2013年第44卷 增刊1 共收錄54篇
1. Accession number:20134616980290
Title:System design and performance analysis on multi-type fruit harvesting robot
Authors:Xiong, Juntao1 ; Ye, Min2 ; Zou, Xiangjun2 ; Peng, Hongxing2 ; Lin, Guichao2 ; Zhu, Mengsi2
Author affiliation:1 School of Information, South China Agricultural University, Guangzhou 510642, China
2 Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Zou, X. (xjzou1@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:230-235
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:According to the requirement of agriculture intelligent development, a multi-type fruit harvesting robot was developed, which could realize the harvesting of single fruit and a string of fruits. The software design and hardware structure of fruit harvesting robot were described. The vision identification and positioning method of litchi and citrus were researched. The behavior control method of manipulator was also researched. The work flow of harvesting robot was expounded. The harvesting experiment of litchi and citrus were designed, and the test results indicated that every modules run well. The harvesting success rate of multi-type fruit harvesting robot for litchi was 80%, and for citrus was 85%. The average execution time of a single harvest cycle for two kinds of fruit was 28 s.
Number of references:16
Main heading:Intelligent robots
Controlled terms:Behavioral research - Fruits - Hardware - Harvesting
Uncontrolled terms:Citrus - Hardware structures - Harvesting robot - Litchi - Performance tests - Software systems
Classification code:605 Small Tools and Hardware - 731.6 Robot Applications - 821.3 Agricultural Methods - 821.4 Agricultural Products - 971 Social Sciences
DOI:10.6041/j.issn.1000-1298.2013.S1.041
Database:Compendex
2. Accession number:20134616980273
Title:Simulation optimization of multilayer manure cleaning system based on discrete element method
Authors:Li, Heng1 ; Li, Tengfei1 ; Gao, Yang1 ; Wang, Hongying1 ; Li, Baoming2
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
2 College of Civil Engineering and Water Resources, China Agricultural University, Beijing 100083, China
Corresponding author:Wang, H. (hongyingw@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:131-137
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to solve the problem existed in using of multilayer manure cleaning system carrying board which were manure accumulated at the end of multilayer manure, high demanding of large height of interlayer spacing in cage system, and poor stability of mechanical scraper, the discrete element analyses software EDEM 2.3 was used to numerically simulate the working process of multilayer manure cleaning system. The effects of the scraper vertical angle X1, the scraper longitudinal angle X2, and the inclination angle of manure carring board X3 on mechanical property of the multilayer manure cleaning scraper were analyzed. The reliability of the simulation model was verified by comparing the performance of virtual scraper and the multilayer manure cleaning scraper equipped in first generation prototype of 9LPT-3. Quadratic orthogonal rotation design with three factors was introduced by the simulation model, the width of manure deposit body after scraping process Y1, the maximum height of manure deposit body in scraping process Y2, and the stability of manure cleaning speed Y3 were selected as the indexes. The result showed that X1, X2 and X3 significantly correlated wih Y1 and Y2 (P<0.0001 and P<0.05 respectively), but didn't correlate with Y3. It could be concluded that the most optimal mechanical property of the multilayer manure cleaning system would be obtained when x1, x2 and x3 were respectively selected as 7°, 35° and 5°.
Number of references:18
Main heading:Manures
Controlled terms:Cleaning - Computer simulation - Deposits - Finite difference method - Mechanical properties - Multilayers - Optimization - Tools
Uncontrolled terms:Cleaning system - Discrete element analysis - Inclination angles - Interlayer spacings - Quadratic orthogonal rotation - Simulation model - Simulation optimization - Working process
Classification code:933.1 Crystalline Solids - 921.6 Numerical Methods - 921.5 Optimization Techniques - 802.3 Chemical Operations - 723.5 Computer Applications - 951 Materials Science - 617 Turbines and Steam Turbines - 605 Small Tools and Hardware - 603 Machine Tools - 532 Metallurgical Furnaces - 452.3 Industrial Wastes - 612 Engines
DOI:10.6041/j.issn.1000-1298.2013.S1.024
Database:Compendex
4. Accession number:20134616980297
Title:Insect pest leaf detection system based on information fusion of image and spectrum
Authors:Xie, Chunyan1 ; Wu, Dake1 ; Wang, Chaoyong1 ; Li, Yan1
Author affiliation:1 College of Engineering and Technology, Southwest University, Chongqing 400716, China
Corresponding author:Wu, D. (keda5@swu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:269-272
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to find out an automatic monitoring method of plant insect pests, non-destructive detection software system with compatibility of PC hardware, Windows XP and Windows 2000 software environment was developed based on the information fusion of image and spectrum, which was programmed by VC and Matlab language. Working principal and process of the system, hardware composition and software system were introduced. The system could collect image and spectral data automatically, process data, predict the damaged degrees (DD) and display the detection results. Finally, the system was used to detect the DD of leaves. The detection results from the experiment showed that the proposed system could be used for non-invasive detection of DD of leaves with high accuracy and reliability.
Number of references:17
Main heading:Plants (botany)
Controlled terms:Computer software - Hardware - Information fusion - MATLAB - Windows operating system
Uncontrolled terms:Automatic monitoring - Detection system - Image - Insect pest - Non-invasive detection - Nondestructive detection - Software environments - Spectrum
Classification code:461.9 Biology - 605 Small Tools and Hardware - 723 Computer Software, Data Handling and Applications - 903.1 Information Sources and Analysis - 921 Mathematics
DOI:10.6041/j.issn.1000-1298.2013.S1.048
Database:Compendex
5. Accession number:20134616980274
Title:Combustion characteristic of bio-tar by HZSM-5 catalytic upgrading
Authors:Jiang, Enchen1 ; Zhao, Chuang1, 2 ; Wang, Mingfeng1 ; Xiong, Leiming1
Author affiliation:1 College of Engineering, South China Agricultural University, Guangzhou 510642, China
2 Guangzhou Devotion Thermal Technology Co., Ltd., Guangzhou 510530, China
Corresponding author:Jiang, E. (ecjiang@scau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:138-142
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Combustion characteristics and kinetics of bio-tar before and after catalytic upgrading were studied on a thermogravimetric apparatus. The results showed that the combustion process was divided into four stages: light organics volatilization, volatilization content combustion, less volatilization content combustion and residue combustion. Weight loss in the first two stages of raw tar was about 75%, whereas that of tar after upgrading was about 90%. With the increasing heating rates, weight loss rate increased heavily along with significantly enhanced combustion stability. According to thermogravimetric curve calculation kinetic parameters, activation energy of upgrading tar was lowered and in agreement with that from TG analysis. The gas from combustion was analyzed by Fourier transform infrared spectroscopy method, which showed the gaseous products generated in three phases of 241-380°C, 380-500°C and 500-600°C.
Number of references:14
Main heading:Combustion
Controlled terms:Activation energy - Enzyme kinetics - Fourier transform infrared spectroscopy - Kinetics - Tar - Thermogravimetric analysis
Uncontrolled terms:Bio-tar - Catalytic upgrading - Combustion characteristics - Combustion stability - Fourier transform infra reds - Thermo-gravimetric experiments - Thermogravimetric apparatus - Thermogravimetric curve
Classification code:931 Classical Physics; Quantum Theory; Relativity - 804 Chemical Products Generally - 801 Chemistry - 931.3 Atomic and Molecular Physics - 524 Solid Fuels - 513 Petroleum Refining - 411 Bituminous Materials - 521.1 Fuel Combustion
DOI:10.6041/j.issn.1000-1298.2013.S1.025
Database:Compendex
8. Accession number:20134616980288
Title:Crop rows detection based on constraint of liner correlation coefficient
Authors:Meng, Qingkuan1 ; Liu, Gang1 ; Zhang, Man1 ; Si, Yongsheng2 ; Li, Mingxuan1
Author affiliation:1 Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing 100083, China
2 College of Information Science and Technology, Agricultural University of Hebei, Baoding 071001, China
Corresponding author:Zhang, M. (cauzm@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:216-223
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To overcome shortages of the existing algorithms for crop rows detection, such as the noise interference and slow processing speed, an algorithm based on constraint of liner correlation coefficient was proposed for crop rows line detection. Firstly, according to the characters of farm land images, ROI area was processed to increase the speed of image processing. Secondly, crop row numbers and edge information were detected by vertical projection method. Finally, an algorithm based on constraint of liner correlation coefficient was adopted to fit the feature points of crop to realize line detection. In order to fit the feature points, the N points were removed, which were the farthest from each side of fit line, until the fitting line met the requirement of liner correlation coefficient r. By comparing with Hough transform and random detection algorithm, the results showed that the proposed algorithm had the advantages of fast detection and strong anti-interference. The results of navigation tracking experiment showed that this navigation system could track the target path accurately and effectively. The maximum lateral deviation was no more than 4 cm and 7 cm at the speed of 0.6 m/s and 1.2 m/s respectively.
Number of references:18
Main heading:Crops
Controlled terms:Algorithms - Computer vision - Feature extraction - Hough transforms - Navigation - Navigation systems - Target tracking
Uncontrolled terms:Anti-interference - Correlation coefficient - Crop rows detection - Detection algorithm - Lateral deviation - Line detection - Noise interference - Vertical projection
Classification code:921.3 Mathematical Transformations - 921 Mathematics - 821.4 Agricultural Products - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television - 434.4 Waterway Navigation
DOI:10.6041/j.issn.1000-1298.2013.S1.039
Database:Compendex
11. Accession number:20134616980281
Title:Beef marbling segmentation based on hyperspectral imaging
Authors:Sun, Xiao1 ; Pang, Bin1 ; Liu, Deying1 ; Chen, Kunjie1
Author affiliation:1 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Chen, K. (kunjiechen@njau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:177-181
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The cross section images of beef rib-eye in spectral region of 400-1000 nm were collected by using a hyperspectral imaging system. With comparative analysis of the spectral curves of the fat regions and the muscle ones of beef rib-eye images, it was found that the reflection intensity of fat regions and muscles areas for beef rib-eye images in different spectral bands were obviously different. Fitting the reflection intensity ratio of the fat regions and muscle regions with the wavelength, it could be concluded that, in the 534 nm band, the difference between the reflection intensity of fat regions and the one of muscle regions was the maximum. The image processings such as median filtering, region growing and Otsu's thresholding etc. were conducted on the original color beef rib-eye images and the 534 nm-band beef rib-eye images for the segmentation of the beef marbling, respectively. The result showed that the higher segmentation accuracy of beef marbling could be obtained by using the 534 nm-band beef rib-eye images compared with the original color beef rib-eye images.
Number of references:19
Main heading:Meats
Controlled terms:Beef - Image segmentation - Median filters - Muscle - Spectroscopy
Uncontrolled terms:Comparative analysis - Cross-section images - Hyperspectral Imaging - Hyperspectral imaging systems - Marbling - Median filtering - Reflection intensity - Segmentation accuracy
Classification code:461.2 Biological Materials and Tissue Engineering - 703.2 Electric Filters - 741.1 Light/Optics - 801 Chemistry - 822.3 Food Products
DOI:10.6041/j.issn.1000-1298.2013.S1.032
Database:Compendex
12. Accession number:20134616980300
Title:System modeling and vibration reduction control for stayed cable-magnetorheological damper
Authors:Feng, Zhimin1 ; Zhang, Xingjun1 ; Zhang, Gang1 ; Hu, Haigang1
Author affiliation:1 Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China
Corresponding author:Feng, Z. (fengzhimin@nbu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:282-287
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:State space model of stayed cable-magnetorheological damper vibration reduction control system was constructed based on Halmiton principle. Taking the main bridge C20 stayed-cable in Ningbo as the research object, the matrix parameters of the state space equations was analyzed and calculated by using the Rayleigh theory. Thus, based on the state space equation and stochastic control system theory, the vibration reduction control algorithm with state variance performance constrain for stayed cable-magnetorheological damper system was analyzed in detail. Simulation results showed that the given vibration reduction control algorithm could guarantee the stability of stayed cable-magnetorheological damper system and receive effective constraint of the system vibration amplitude. The vibration reduction control effect was good.
Number of references:16
Main heading:Cables
Controlled terms:Algorithms - Convergence of numerical methods - Equations of state - State space methods
Uncontrolled terms:Effective constraints - Magneto-rheological dampers - Matrix parameters - State - space models - State space equation - Stayed-cable - System vibrations - Vibration reductions
Classification code:535 Rolling, Forging and Forming - 723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.6 Numerical Methods
DOI:10.6041/j.issn.1000-1298.2013.S1.051
Database:Compendex
13. Accession number:20134616980282
Title:Rapid detection of microorganisms indicators for agricultural products
Authors:Ding, Yun1 ; Yin, Yongguang2
Author affiliation:1 Editorial Department of Journal of Bionic Engineering, Jilin University, Changchun 130022, China
2 College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China
Corresponding author:Ding, Y. (dingyun@jlu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:182-188
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to meet the demand of rapid detection of microorganisms indicators for agricultural products in safety onsite monitoring, an automatic rapid detection system was developed based on computer vision and serial-communication technology. The realized functions of the proposed system included, automatic capture of the images, auto-focus of the system, analysis and processing of images, output the detection results, etc. The system adopted an auto-focus technology based on digital image processing. According to the characteristics of staining images of microorganisms in the agricultural products, rough focusing method combined with accurate focusing method were used to improve the auto-focus efficiency. The average auto-focus time of the system was 10.2 s. By using this detection system, the close to real-time detection results could be obtained (detection time was less than 1 h). Moreover, the system had advantages of easy operation and high automation.
Number of references:17
Main heading:Microorganisms
Controlled terms:Agricultural products - Computer vision - Image processing
Uncontrolled terms:Detection system - Detection time - High automation - On-site monitoring - Rapid detection - Rapid detection systems - Real-time detection - Technology-based
Classification code:461.9 Biology - 741 Light, Optics and Optical Devices - 741.2 Vision - 821.4 Agricultural Products
DOI:10.6041/j.issn.1000-1298.2013.S1.033
Database:Compendex
19. Accession number:20134616980256
Title:Design and experiment of helm-shaped no-tillage precision fertilization planter for corn
Authors:Li, Fuhui1 ; Du, Ruicheng1 ; Diao, Peisong1 ; Zhang, Yinping1 ; Cui, Qiang1 ; Li, Teng1
Author affiliation:1 School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author:Diao, P. (dps2003@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:33-38
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The seeds always collided with the seeds tube and opener during the process of seeding. Due to the combined effect of the collision and machines forward, the landing position of the seed was random, which resulted in lower uniformity. To solve this problem, a helm-shaped no-tillage precision fertilization planter for corn was designed. It was mainly composed of crush straw and seedlings zone cleaning device and helm dipper disk type of dibber. The helm dipper disk type of dibber was integrated by the steering wheel of dibble and dipper disk seeding device. The steering wheel of dibble could take the seeds accurately and the dipper disk seeding device could throw seeds in fixed points, so that the precision sowing was realized. The fertilizer ditch was generated by the crush straw and seedlings zone cleaning device. The fertilization was completed by the outer sheave of fertilizer device. The result of field experiments showed that the average depth of sowing and fertilization were 52.1 mm and 70.5 mm, and the germination rate was improved to 95%. It satisfied the requirements of conservation tillage technology in the experimental area.
Number of references:15
Main heading:Cultivation
Controlled terms:Fertilizers - Soil conservation - Wheels
Uncontrolled terms:Cleaning devices - Conservation tillage - Disk-type - Field experiment - Germination rates - No tillage - Precision fertilizations - Precision sowing
Classification code:601.2 Machine Components - 804 Chemical Products Generally - 821.3 Agricultural Methods
DOI:10.6041/j.issn.1000-1298.2013.S1.007
Database:Compendex
23. Accession number:20134616980257
Title:Parameters optimization of precision seeder with corn whole plastic-film mulching on double ridges in dry land
Authors:Dai, Fei1 ; Zhao, Wuyun1 ; Tang, Xuepeng1 ; Li, Xingrui1
Author affiliation:1 School of Engineering, Gansu Agricultural University, Lanzhou 730070, China
Corresponding author:Zhao, W. (zhaowy@gsau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:39-45
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The corn precision seeder with whole plastic-film mulching on double ridges in dry land was researched independently. The horizontal absolute velocity of hole-former was made zero at seeding time by using cam and crank combination mechanism to control it, which could improve the planting operation process tore film, picked film and dislocated of the soil hole with hole-former. For further study the working performance with the corn precision seeder, the Box-Behnken experimental design with four factors and three levels was performed, parameters such as seeder speed, rotation speed of crank mechanism, rotation speed of cam mechanism and angle of film cutter were selected as independent variables, which would influence dislocation of soil hole rate. The mathematical model was established. The effects of various parameters and their interactions were analyzed as well. The test results showed that effects order of four parameters on dislocation of soil hole rate were as follows: rotation speed of cam mechanism, rotation speed of crank mechanism, seeder speed and angle of film cutter. The optimal working parameters were seeder speed of 0.50 m/s, rotation speed of crank mechanism of 50.2 r/min, rotation speed of cam mechanism of 46.4 r/min and angle of film cutter of 23.6°, then the dislocation of soil hole rate production of 1.221% was obtained. Confirmatory tests showed that the relative error was little.
Number of references:12
Main heading:Soils
Controlled terms:Cams - Mathematical models - Optimization - Seed
Uncontrolled terms:Box-Behnken experimental design - Combination mechanisms - Corn - Independent variables - Parameters optimization - Precision seeder - Response surface method - Working performance
Classification code:483.1 Soils and Soil Mechanics - 601.3 Mechanisms - 821.4 Agricultural Products - 921 Mathematics - 921.5 Optimization Techniques
DOI:10.6041/j.issn.1000-1298.2013.S1.008
Database:Compendex
24. Accession number:20134616980271
Title:Numerical calculation and experiment on pressure fluctuation in axial flow pump
Authors:Yao, Jie1 ; Shi, Weidong1 ; Wu, Suqing1 ; Zhang, Desheng1 ; Wang, Haiyu1 ; Hu, Qixiang1
Author affiliation:1 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Shi, W. (wdshi@ujs.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:119-124
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Considering actual mounting dimension of each pipe section, the steady and unsteady total flow field was calculated based on the excellent hydraulic model of axial flow pump. Fluid domain was discretized with structured mesh and analyzed with standard turbulence model. Pressure fluctuation values of impeller inlet, impeller outlet, middle of the guide vane and guide vane outlet were monitored. It turned out that prediction results were in good agreement with the experimental results. Radial distribution of pressure fluctuation for axial flow pump at different rotation speeds was investigated, and the results showed that the distribution of RMS along the radius also changed when the rotation speed varied. In terms of frequency domain chart, at the inlet of impeller, large amplitude of sub-harmonic emerged in the middle of the passage and near the hub; while at the guide vane outlet, amplitude of sub-harmonic of the monitor point in the middle of passage was relative higher and amplitude of sub-harmonic was relative lower near the hub and passage outer edge.
Number of references:13
Main heading:Fluidized beds
Controlled terms:Axial flow - Harmonic analysis - Hydraulic models - Impellers - Shafts (machine components) - Turbulence models
Uncontrolled terms:Amplitude characteristics - Axial flow pump - Frequency domains - Guide vane outlets - Numerical calculation - Pressure fluctuation - Radial distributions - Spectral characteristics
Classification code:601.2 Machine Components - 631.1 Fluid Flow, General - 632.1 Hydraulics - 802.1 Chemical Plants and Equipment - 921.6 Numerical Methods
DOI:10.6041/j.issn.1000-1298.2013.S1.022
Database:Compendex
29. Accession number:20134616980293
Title:Design of nonlinear motion cutter for litchi harvesting robot
Authors:Luo, Chengyu1 ; Zou, Xiangjun1 ; Ye, Min1 ; Lin, Guichao1 ; Tan, Jianhao1
Author affiliation:1 Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Zou, X. (xjzou1@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:247-252 246
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The curve equation of cutter was established which could determine cutting path and mathematical model. The 3-D model of cutter was constructed. Then, the force condition when the cutter working was analyzed. The law of slip shear motion was discussed. The slip shear angle of cutting edge was deduced. The edge curve of cutter was described. With the construction of slip shear motion equation of the nonlinear motion cutter, slip shear angle of the cutter under dynamic conditions was put forward. Finally, the force and movement of cutter were built in 3-D visual simulation. The harvesting robot prototype installed with the designed cutter was performed in cutting experiments, which could snip the diameter of 1-8 mm for litchi branch. Results of simulation and physical experiments showed the effectiveness of the slip shear model and movement equation of cutter. Its nonlinear motion could meet the cutting composite trajectory requirements of realizing feed movement and rotary-cutting. Meanwhile, this scheme could reduce the feed motor and transmission mechanism in X- and Y-directions and achieve the function of cutting. The maximum cutting force acquired by simulation and physical cutting tests was 600 N. The proposed cutter was suit for the diameter of 1-6 mm and had good performance.
Number of references:29
Main heading:Cutting
Controlled terms:Computer simulation - Cutting tools - Equations of motion - Experiments - Harvesting - Machine design - Mathematical models - Robots
Uncontrolled terms:Cutter design - Harvesting robot - Litchi - Maximum cutting force - Movement equations - Non-linear motions - Physical experiments - Transmission mechanisms
Classification code:921.2 Calculus - 921 Mathematics - 901.3 Engineering Research - 821.3 Agricultural Methods - 731.5 Robotics - 723.5 Computer Applications - 605 Small Tools and Hardware - 604.1 Metal Cutting - 601 Mechanical Design
DOI:10.6041/j.issn.1000-1298.2013.S1.044
Database:Compendex
30. Accession number:20134616980279
Title:Non-destructive detection of water content in fresh pork based on hyperspectral imaging technology
Authors:Liu, Shanmei1, 2 ; Li, Xiaoyu2 ; Zhong, Xiongbin2 ; Wen, Dongdong2 ; Zhao, Zheng2
Author affiliation:1 College of Science, Huazhong Agricultural University, Wuhan 430070, China
2 College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Li, X. (lixiaoyu@mail.hzau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:165-170 164
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to build a robust model for predicting water content in fresh pork based on hyperspectral imaging technology, the influence of sample set partition, spectral preprocessing and wavelengh selection on model prediction result was discussed. The pork sample set was parted by concentration gradient (CG) firstly, and then the reflectance spectra was pre-processed with multiple scattering correlation (MSC), first derivative and autoscale successively. The partial least square regression (PLSR) model was built, which had the best prediction abilities. The water content values were predicted with the cross-validation and prediction correlation coefficients (Rc and Rp) of 0.814 and 0.804, with the root mean square error (RMSECV and RMSEP) values of 0.726% and 0.686%, respectively. The feature wavelengths were identified by using competitive adaptive reweighted algorithm. The proposed PLSR model was again built by using the feature wavelengths, which had remarkable prediction abilities with Rc and Rp of 0.926 and 0.924, with RMSECV and RMSEP of 0.467% and 0.438%, respectively.
Number of references:21
Main heading:Forecasting
Controlled terms:Imaging techniques - Mean square error - Meats - Spectroscopy - Water content
Uncontrolled terms:Concentration gradients - Correlation coefficient - Fresh pork - HyperSpectral - Hyperspectral imaging technologies - Nondestructive detection - Partial least square regression - Root mean square errors
Classification code:921 Mathematics - 822.3 Food Products - 801 Chemistry - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 444 Water Resources
DOI:10.6041/j.issn.1000-1298.2013.S1.030
Database:Compendex
34. Accession number:20134616980264
Title:Effects of different tillage managements on characteristics of soil and crop in annual double cropping areas in northern China
Authors:Zhang, Xiangcai1 ; Li, Hongwen1 ; He, Jin1 ; Wang, Qingjie1 ; Zheng, Zhiqi1 ; Jing, Peng1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:He, J. (hejin@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:77-82 71
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to study the adaptability of different tillage treatments in annual double cropping areas in northern China, four different tillage treatments were set up, including subsoiling, rotary tillage, conventional tillage and no-till. The effects of different tillage treatments on soil water stable aggregates, soil bulk density, soil water content, soil temperature and crop growth were studied. The results showed that, no-till and subsoiling increased the content of soil water stable aggregates with a diameter larger than 0.25 mm at 0-10 cm and 10-30 cm soil layer, respectively. While the results of no-till and conventional tillage was not obvious. The regulating effects in soil bulk density were increased with the increase of the depth of soil layer. Rotary tillage and subsoiling could reduce the content of soil bulk density at 0-10 cm and 10-30 cm soil layer, respectively. The soil bulk density of no-till was the biggest at 0-20 cm soil layer, and there were no significant differences observed among the conventional tillage, rotary tillage and no-tillage under 20 cm soil layer. The preserve soil moisture ability of subsoiling was higher than others. Compared with subsoiling, the soil moisture content of rotary tillage, plowing tillage and no-tillage was reduced by 2.5%, 1.6%, 0.4%, respectively. The range of soil temperature of plowing tillage was the greatest with the change of air temperature, while the range and daily mean soil temperature of no-till was the least. Subsoiling promoted the yield of winter wheat and the growth of crops in the initial stage, while no-till had a better result at a later stage.
Number of references:15
Main heading:Agricultural machinery
Controlled terms:Aggregates - Crops - Cultivation - Soil moisture - Temperature
Uncontrolled terms:Northern China - Soil temperature - Soil water-stable aggregates - Subsoiling tillage - Tillage treatment
Classification code:406 Highway Engineering - 483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.6041/j.issn.1000-1298.2013.S1.015
Database:Compendex
42. Accession number:20134616980262
Title:Analysis of suction height and seed-adding device for suction-vibration precision seeder
Authors:Chen, Jin1 ; Li, Jianhua1 ; Li, Yaoming2 ; Gong, Zhiqiang1
Author affiliation:1 School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
2 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Chen, J. (chenjinjd126@126.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:67-71
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:During the operation of suction-vibration precision seeder, the seeds on the tray were reducing continuously and suction height was declined accordingly. Through the experiments, combining with physical characteristics of rice seeds, the law of quantitative change for these seeds was obtained. A control method of suction height was proposed. Moreover, the quantity and cycle of the seeds-adding device were determined and seeding tests were conducted. The results showed that the seed-suction height control method and the seeds-adding control mode could make the seeds-layer thickness range at 8-18 mm, and the absorbing rate of the seeds-suction could arrive at 94% or more, which was able to meet the requirements of precision seeding seeder.
Number of references:11
Uncontrolled terms:Control methods - Height control - Physical characteristics - Precision seeding - Precision sowing - Quantitative changes - Suction height - Suction-vibration
DOI:10.6041/j.issn.1000-1298.2013.S1.013
Database:Compendex
45. Accession number:20134616980270
Title:Large eddy simulation of unsteady flow in tip region of axial-flow pump
Authors:Li, Yaojun1 ; Shen, Jinfeng1 ; Liu, Zhuqing1 ; Tang, Xuelin1 ; Zhang, Zhimin2
Author affiliation:1 College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
2 China Institute of Water Resources and Hydropower Research, Beijing 100044, China
Corresponding author:Li, Y. (liyaojun@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:113-118
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To discover the characteristic of tip clearance flow, the large eddy simulation (LES) method with sliding mesh technique was used for analyzing the unsteady flow in a low-specific-speed axial-flow pump under five different operating conditions. The tip-leakage vortices and pressure pulsations of near-tip zone on the blades were examined. It was found that the dominant tip-leakage vortex extended to the pressure side of the neighboring blade for all five investigated flow rates. As the flow rate increased from 0.7Qd to 1.2Qd, the angle between the dominant tip-leakage vortex and the blade reduced from 20° to 14°. The results also showed that the amplitude of pressure fluctuation in the near-tip zone on the blades became higher when the flow rate was farer from the design flow rate, especially on the pressure side of the blade. At the 0.7Qd condition, the pressure fluctuation amplitude of the monitoring point PP3 (at the near-tip zone on the pressure side of the blade close to the blade leading edge) was 8.5 times of the one at design flow rate, and the high-frequency pulsation occurred due to tip-leakage vortices. When the flow rate was more than 1.0Qd, the pressure fluctuations of PP3 was dominated by the rotation frequency.
Number of references:14
Main heading:Vortex flow
Controlled terms:Flow rate - Large eddy simulation - Unsteady flow
Uncontrolled terms:Axial flow pump - Different operating conditions - Large Eddy simulation methods - Pressure fluctuation - Rotation frequencies - Sliding mesh technique - Tip clearance - Tip-leakage vortex
Classification code:631 Fluid Flow - 631.1 Fluid Flow, General - 921 Mathematics
DOI:10.6041/j.issn.1000-1298.2013.S1.021
Database:Compendex
54. Accession number:20134616980268
Title:Design of power chassis for low self-propelled orchard sprayer
Authors:Ding, Suming1 ; Fu, Ximin1 ; Xue, Xinyu1 ; Zhou, Liangfu1 ; Lü, Xiaolan1
Author affiliation:1 Nanjing Research Institute of Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
Corresponding author:Ding, S. (dingsuming@caas.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:100-106
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A low self-propelled sprayer for conventional orchard was developed in order to solve the plant protection mechanization. The power distribution unit was designed by theoretical analysis and virtual prototype to realize all working parts running independently. Eight shifts were designed by main and assistant gear-box. The sprayer could switch two-wheel drive to four-wheel drive according to running condition. Its minimum trafficable height was 1600 mm. In the dosage range of 0-400 L, the front wheels crossed obstacles reduced from the 87 mm to the 70 mm, and rear wheel obstacles height was independent of dosage. The minimum turning radius was about 2000 mm. The simulation result by Creo Parametric 2.0 showed the sprayer worked steadily, and the velocity was between 1.5 to 16 km/h. The effects of pesticide volume on centre of gravity and stability were little.
Number of references:19
Main heading:Wheels
Controlled terms:Chassis - Machinery - Orchards
Uncontrolled terms:Centre of gravity - Four-wheel drives - High-trafficability - Orchard sprayers - Power distribution units - Running conditions - Self-propelled - Virtual prototype
Classification code:601 Mechanical Design - 601.2 Machine Components - 663.2 Heavy Duty Motor Vehicle Components - 821.3 Agricultural Methods
DOI:10.6041/j.issn.1000-1298.2013.S1.019
Database:Compendex
58. Accession number:20134616980287
Title:Fusion positioning method based on weighted-confidence for tractor integrated navigation
Authors:Zhu, Zhongxiang1 ; Han, Keli2 ; Song, Zhenghe1 ; Xie, Bin1 ; Mao, Enrong1
Author affiliation:1 Beijing Key Laboratory of Optimized Design for Modern Agricultural Equipment, China Agricultural University, Beijing 100083, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Mao, E. (gxy15@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:210-215 223
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:According to the problem of location failure or large deviation probably generated on account of sensor information loss or abnormal fluctuation when the tractor worked in the complicated field environment, a multi-sensor fusion positioning system based on the weighted-confidence was designed, which composed of global position system and dead reckoning system. The corresponding sub-filter and the global filter were constructed based on the federated Kalman filtering. Then the confidence distance and confidence function of every sensor was defined to compute the confidence coefficient of each sub-filter, which was used as adaptive factor after weighted arithmetic. Finally, the adaptive factors were fused optimally in the global filter to get more accurate position estimates. The computer simulation and field test were carried out to validate the effectiveness and reliability of the designed multi-sensor fusion positioning system.
Number of references:11
Main heading:Navigation systems
Controlled terms:Computer simulation - Navigation - Sensors - Tractors (agricultural) - Tractors (truck)
Uncontrolled terms:Automatic navigation - Dead reckoning system - Global position systems - Integrated navigation - Multi-sensor fusion - Positioning methods - Sensor informations - Weighted-confidence
Classification code:434.4 Waterway Navigation - 663.1 Heavy Duty Motor Vehicles - 716.3 Radio Systems and Equipment - 723.5 Computer Applications - 801 Chemistry
DOI:10.6041/j.issn.1000-1298.2013.S1.038
Database:Compendex
60. Accession number:20134616980285
Title:Wavelet denoising in prediction model of tomato Vitamin C content using NIR spectroscopy
Authors:Li, Tianhua1 ; Shi, Guoying1 ; Wei, Min1 ; Wang, Jianmin2 ; Hou, Jialin1
Author affiliation:1 College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
2 College of Chemistry and Material Science, Shandong Agricultural University, Taian 271018, China
Corresponding author:Hou, J. (jlhou@sdau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:200-204
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:For removing the noise in the spectral data, Matlab 7.0 wavelet toolbox was used to denoise the data. In order to get the best denoising effect, the model evaluation parameters were investigated from the db2 to db9 wavelet respectively in dbN wavelet basis, and the db6 was thought to be the best wavelet according to the investigation result. Using the db6 wavelet, the optimal decomposition layer was five when changed from three to seven. For getting the best denoising method, the signal-to-noise ratio (SNR) and root mean square error (RMSE) were used to evaluate denoising effect in different thresholds, and the hard threshold value of the heuristic denoising method was observed to be the best one. The prediction model was built using the reconstruction spectrum by partial least squares (PLS) method. The correlation coefficient of the proposed model was 0.907. The root mean square error values of calibration and prediction were 0.819 and 0.905. The performance index was 88.3%. The model parameters using wavelet denoising were better than the original signal. It was showed that wavelet denoising was feasible in prediction of tomato vitamin C with NIR spectroscopy.
Number of references:15
Main heading:Wavelet decomposition
Controlled terms:Forecasting - Fruits - Heuristic methods - Infrared devices - Least squares approximations - Mathematical models - Mean square error - Near infrared spectroscopy - Signal to noise ratio
Uncontrolled terms:Near Infrared - Partial least square (PLS) - Tomato - Vitamin C - Wavelet denoising
Classification code:716.1 Information Theory and Signal Processing - 731.1 Control Systems - 741.3 Optical Devices and Systems - 821.4 Agricultural Products - 921 Mathematics
DOI:10.6041/j.issn.1000-1298.2013.S1.036
Database:Compendex
62. Accession number:20134616980253
Title:Automatic delivery mechanism of potted-seedling for vegetable transplanter based on PLC
Authors:Yang, Chuanhua1, 2 ; Fang, Xianfa1 ; Yang, Xuejun1 ; Wang, Chong1 ; Liu, Zhongjun1 ; Sun, Xing1
Author affiliation:1 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
2 School of Mechanical Engineering, Jiamusi University, Jiamusi 154007, China
Corresponding author:Fang, X. (fangxf@caams.org.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:19-23 18
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:An automatic delivery mechanism of potted-seedling for vegetable transplanter based on PLC was designed. The automatic mechanism of taking potted-seedling from pot with non-damaging was designed. The ejector pin driven by high speed servo electric cylinder was used. The potted-seeding was taken from the pot with precise, high speed and non-damaging. The potted-seedling was located and transplanted precisely by the stepping motor which was controlled by the software system of PLC. The casting potted-seedling mechanism synchronously, consisted of the timing belt and gear, was designed, which realized the synchronous movement between the casting potted-seedling unit and the duckbilled-type planting shoe. The problem of non-uniform rotation velocity of duckbilled-type planting shoe driven by ground wheel was solved. The seedling accuracy was increased. At last, the device was designed, which verified the correctness of automatic delivery mechanism.
Number of references:11
Main heading:Vegetables
Controlled terms:Belt drives
Uncontrolled terms:Automatic mechanisms - Delivery mechanism - Duckbilled-type planting shoe - Ground wheels - Potted-seedling - Rotation velocity - Software systems - Synchronous movement
Classification code:602.1 Mechanical Drives - 821.4 Agricultural Products
DOI:10.6041/j.issn.1000-1298.2013.S1.004
Database:Compendex
63. Accession number:20134616980280
Title:Rapid detection model of beef quality based on spectroscopy
Authors:Tian, Xiaoyu1 ; Xu, Yang1 ; Peng, Yankun1 ; Tang, Xiuying1 ; Guo, Hui1 ; Lin, Wan1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Xu, Y. (xuyang@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:171-176
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A beef quality on-line detection and classification models by Vis/NIR reflectance spectroscopy was established. The system parameters were optimized. Signal collection and spectroscopy preprocess were carried out by Vis/NIR reflectance spectroscopy and a handheld probe device. The scanning times were set on condition that system kept proper detection accuracy and stability, which was 10 times in wavelength range of 400-700 nm and 30 times in wavelength range of 700-2000 nm, and acquisition time of 900 ms. Spectra leverage value of beef was calculated to eliminate abnormal samples, and then different data processing methods were used to establish beef quality PLSR models which finally showed the optimal result of beef quality prediction. The results indicated that the PLSR model with SNV processing had better performance, with the correlation coefficient of 0.9068 and root mean square error of 7.1963 N for validation set of beef tenderness, 0.8854 and 2.3628 for L*, 0.8362 and 2.2969 for a*, 0.8453 and 2.1054% for validation set of beef cooking loss, respectively. The correlation coefficient was above 0.8 and the tenderness classification accuracy reached to 93.5%.
Number of references:24
Main heading:Meats
Controlled terms:Beef - Data processing - Image quality - Mean square error - Optimization - Spectroscopy - Wavelength
Uncontrolled terms:Classification accuracy - Classification models - Correlation coefficient - Data processing methods - Model validation - Rapid detection - Reflectance spectroscopy - Root mean square errors
Classification code:921.5 Optimization Techniques - 822.3 Food Products - 801 Chemistry - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 723.2 Data Processing and Image Processing - 711 Electromagnetic Waves
DOI:10.6041/j.issn.1000-1298.2013.S1.031
Database:Compendex
66. Accession number:20134616980267
Title:Motion analysis and experiment on spring-tooth mulching plastic film collector
Authors:Xie, Jianhua1, 2 ; Hou, Shulin1 ; Fu, Yu1 ; Na, Mingjun3 ; Zhang, Huiyou3
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
2 College of Mechanical and Traffic, Xinjiang Agricultural University, Urumqi 830052, China
3 College of Engineering, Northeast Agricultural University, Harbin 150030, China
Corresponding author:Hou, S. (hsl010@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:94-99
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To investigate factors influencing the performance of mulching plastic film collector and determine the optimal working conditions, the theoretical analysis and motion simulation were carried out. By using the soil-bin trolley experiment, the orthogonal experiment with influence factors of machine operating speed, speed ratio (the ratio of spring-tooth axis speed and the speed of machine operating) and the embedded depth of the shovel for lifting film was carried out. Consistent with theoretical analysis, simulative studies demonstrated that the collection ratio of mechanism could reach the optimal when the machine operating speed was 0.7 m/s, the speed ratio was 1.0, and the embedded depth of the shovel for lifting film was 110 mm.
Number of references:16
Main heading:Speed
Controlled terms:Experiments - Optimization - Plastic films - Shovels
Uncontrolled terms:Embedded depth - Machine operating - Motion analysis - Motion simulations - Orthogonal experiment - Speed ratio
Classification code:405.1 Construction Equipment - 817.1 Polymer Products - 901.3 Engineering Research - 921.5 Optimization Techniques - 931.1 Mechanics
DOI:10.6041/j.issn.1000-1298.2013.S1.018
Database:Compendex
68. Accession number:20134616980269
Title:Design and experiment of jet mixing apparatus based on CFD
Authors:Zhou, Liangfu1 ; Fu, Ximin1 ; Xue, Xinyu1 ; Zhou, Lixin1 ; Kong, Wei1 ; Qiu, Wei2
Author affiliation:1 Nanjing Research Institute of Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China
2 College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
Corresponding author:Zhou, L. (zhouliangfu@caas.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:107-112
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The jet mixing apparatus (JMA) is an important part for mixing the water with the pesticide, which has good prospect in large plant protection machinery. The parameter of area ratio, area of nozzle and distance between nozzle and mixing chamber were discussed by theoretical analysis. The standard k-Ε two-equation model was adopted to simulate the interior flow field. Combined with experiment data, the performance characteristics, the effects of structural parameters on the JMA property were discussed. Results showed that the optimum area ratio was related to working pressure, outlet pressure and jet pressure. The distance between nozzle and mixing chamber should be equal to optimum extent of free stream. The maximum relative error and average error of relative pressure at different area ratio were 0.125 and 0.051, respectively. The numerical model and simulation method were validated validate to meet the requirements of engineering. The jet flow decreased when the relative pressure greater than 0.3. The maximum relative pressure was between 0.5 and 0.6 under different available pressures. The optimum area ratio of JMA was between 1.6 and 2.0. The optimum distance between nozzle and mixing chamber was between 2.6 mm and 4.6 mm.
Number of references:14
Main heading:Mixing
Controlled terms:Computational fluid dynamics - Computer simulation - Experiments - Machinery - Nozzles - Numerical models
Uncontrolled terms:Interior flow field - Maximum relative errors - Modeling and Simulation Methods - On-line mixing - Performance characteristics - Plant protection - Structural parameter - Two-equation model
Classification code:601 Mechanical Design - 631.1 Fluid Flow, General - 723.5 Computer Applications - 802.3 Chemical Operations - 901.3 Engineering Research - 921 Mathematics
DOI:10.6041/j.issn.1000-1298.2013.S1.020
Database:Compendex
69. Accession number:20134616980272
Title:Effect of different tongue angels on unsteady flow in centrifugal pump
Authors:Shi, Weidong1 ; Xu, Yandong1 ; Li, Wei1 ; Zhang, Hua1 ; Hu, Yinghai2
Author affiliation:1 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
2 The Eleventh Design and Res. Inst. of Information Industry and Electronic Technology Eng. Co., Ltd., Suzhou 215011, China
Corresponding author:Shi, W. (wdshi@ujs.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:125-130
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to study the impact of different tongue angels on the rotor-stator interaction, the internal flow of the centrifugal pump with three different tongue angels was simulated numerically by simulation of full flow field. The pump performance, internal flow characteristics, pressure pulsation characteristics and the radial force characteristic were obtained. Compared with the experiment results of pump performance, PIV test results and CFD computations, the proposed numerical methods had higher accuracy. The results showed that when tongue angel increased from 23° to 33° gradually, the head showed an increasing tendency and the high efficiency zone was widened. The maximum efficiency point was toward to the large discharge. The internal low was improved and the turbulent kinetic energy distribution was uniform with tongue angel of 33°. When tongue angel was 23°, the amplitude of the pressure fluctuation and the radial force on the impeller were significantly greater than the other two types of volute for different operating conditions. Under the low flow rate, the radial force pointed to positive Y-axis with the decreasing of tongue angels, while under the design flow rate and large flow rate, the radial force on the impeller was distributed symmetrically. Therefore, the pressure fluctuation near tongue could effectively be improved and the radial force on the impeller reduced with the increasing of tongue angels.
Number of references:13
Main heading:Computational fluid dynamics
Controlled terms:Centrifugal pumps - Computer simulation - Flow rate - Impellers - Kinetics
Uncontrolled terms:Different operating conditions - Internal flow characteristics - Pressure fluctuation - Pressure pulsation - Radial forces - Rotor-stator interactions - Tongue angel - Turbulent kinetic energy distribution
Classification code:601.2 Machine Components - 618.2 Pumps - 631 Fluid Flow - 723.5 Computer Applications - 931 Classical Physics; Quantum Theory; Relativity
DOI:10.6041/j.issn.1000-1298.2013.S1.023
Database:Compendex
72. Accession number:20134616980252
Title:Research on disk conveying device and positioning control system for transplanter
Authors:Wu, Jianmin1 ; Yan, Hua1 ; Jin, Xin2, 3 ; Guo, Yuhui1 ; Chen, Ke2 ; Dong, Zhe2, 4
Author affiliation:1 The Modern Agricultural Equipment Co., Ltd., Beijing 100083, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
3 College of Engineering, China Agricultural University, Beijing 100083, China
4 College of Engineering, Shenyang Agricultural University, Shenyang 110866, China
Corresponding author:Wu, J. (wujm@caams.org.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:14-18
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A kind of transplanting seedling disc conveying device and positioning control system were developed for automatic disk conveying and accurate position of pot seedling transplanter. The moving speed and distance of seedling disc could be adjusted according to the disc size, which was driven by gas-liquid damping cylinder. The PLC was used as control core and the touch screen was used as human-machine interface. Experimental results showed that the influence caused by the cylinder response lag and machining error could be eliminated by setting the compensation value. The positioning control error was less than 1 mm, which met requirements of high-speed automatic transplanting machine.
Number of references:11
Main heading:Cylinders (shapes)
Controlled terms:Error compensation - Human computer interaction
Uncontrolled terms:Human Machine Interface - Machining error - Moving speed - Position controlling - Positioning control - Positioning control system - Pot seedling transplanters - Transplanting machine
Classification code:408.2 Structural Members and Shapes - 461.4 Ergonomics and Human Factors Engineering - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
DOI:10.6041/j.issn.1000-1298.2013.S1.003
Database:Compendex
73. Accession number:20134616980284
Title:Surface defect detection and classification system for cherry tomatoes
Authors:Du, Yongzhong1 ; Ping, Xueliang1 ; He, Jiawei1
Author affiliation:1 School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China
Corresponding author:Ping, X. (ping@jiangnan.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:194-199
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A system with functions of surface defect detection and classification for cherry tomatoes based on machine vision was proposed. The system integrated image acquisition, image processing, image recognition and robotic palletizing, which could achieve image filtering, binarization, edge detection and location identification. An edge-detection algorithm was proposed based on fractional differential and Sobel operator. The effectiveness of the proposed algorithm was tested by comparing the sorting results of seven different algorithms on the same parcel of cherry tomatoes. Experimental results showed that the algorithm could effectively detect defects and classify the cherry tomatoes. The comprehensive classification accuracy was 98.4% with a good application prospect.
Number of references:26
Main heading:Fruits
Controlled terms:Algorithms - Computer vision - Defects - Edge detection - Image processing
Uncontrolled terms:Application prospect - Cherry tomatoes - Classification accuracy - Classification system - Fractional differential - Image filtering - Location identification - Surface defect detections
Classification code:951 Materials Science - 921 Mathematics - 821.4 Agricultural Products - 741.2 Vision - 741 Light, Optics and Optical Devices - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television - 423 Non Mechanical Properties and Tests of Building Materials
DOI:10.6041/j.issn.1000-1298.2013.S1.035
Database:Compendex
74. Accession number:20134616980289
Title:Modeling and simulation of rice paddy field virtual scene
Authors:Yuan, Yanwei1 ; Li, Shujun1 ; Wu, Haihua1 ; Dong, Xin1 ; Zhang, Junning1 ; Wang, Ke1
Author affiliation:1 State Key Laboratory of Soil-Plant-Machine System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Li, S. (lisj@caams.org.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:224-229
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To reduce the limitation of the season and place for transplanter automatically driving, the virtual test scene model of rice paddy field was studied. The fractal based rice paddy field terrain and water wave generation methods were studied. The information of terrain and topography in rice paddy field were studied with digital maps. With Multigen Creator, 3-D scene with rice seedlings, ridge belts, drains and other information were generated. Fractal based water wave simulation method was used to simulate dynamic effects on water wave while transplanter was driving in paddy field. According to the position error between crop rows and transplanter model, the transplanter model was driving along rice seedlings rows in virtual scene.
Number of references:12
Main heading:Water waves
Controlled terms:Fractals - Landforms - Virtual reality
Uncontrolled terms:Model and simulation - Multigen creator - Position errors - Rice paddy - Simulation - Terrain Modeling - Wave generation - Wave simulations
Classification code:471.4 Seawater, Tides and Waves - 481.1 Geology - 723 Computer Software, Data Handling and Applications - 921 Mathematics
DOI:10.6041/j.issn.1000-1298.2013.S1.040
Database:Compendex
76. Accession number:20134616980301
Title:Preliminary tests and mechanical property test-bed of soil for lunar surface sampler
Authors:Zhao, Zhenjia1 ; Zou, Meng1 ; Zhang, Rongrong1 ; Wei, Cangang1 ; Yu, Yongjun1
Author affiliation:1 Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
Corresponding author:Zou, M. (zoumeng@jlu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:288-291
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:An experimental apparatus was designed to analyze the mechanics parameter of shovel and excavationof the lunar soil. The test bed was consisted of two parts: shovel device and excavating device, which could realize linear shovel movement and rotational excavating movement. The shovel test with this experimental apparatus proved that shovel speed had very little effect on the force of shovel while different compaction status of lunar soil and angle of shovel affected a lot of force of shovel. In the excavation experiment, with the increasing of revolving speed, the peak torque would also increase. The experiment initially confirmed the parameters of properties of soil mechanics of sampling machine on the surface layer. It could supply significant reference to the study of mechanical property of the interactions between the sampler and lunar soil.
Number of references:13
Main heading:Soil testing
Controlled terms:Equipment testing - Excavation - Experiments - Mechanical properties - Moon - Shovels - Soil mechanics - Soils
Uncontrolled terms:Experimental apparatus - Lunar soil - Lunar surface - Sampler - Surface layers
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 951 Materials Science - 901.3 Engineering Research - 502.1 Mine and Quarry Operations - 483.1 Soils and Soil Mechanics - 405.1 Construction Equipment - 657.2 Extraterrestrial Physics and Stellar Phenomena
DOI:10.6041/j.issn.1000-1298.2013.S1.052
Database:Compendex
86. Accession number:20134616980296
Title:Structure design and simulation analysis of weeding robot
Authors:Sun, Yanxia1 ; Chen, Yong1 ; Jin, Xiaojun1 ; Wang, Yan1
Author affiliation:1 College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
Corresponding author:Chen, Y. (chenyongjsnj@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:264-268
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A weeding robot that could work on intra-row weeding and inter-row weeding simultaneously was proposed to improve weeding efficiency. The robot adopted suspension structure for the optimization of field adaptability. Physical prototype of the robot was developed and manufactured. According to the obstacle-crossing analysis, the suspension structure was of good adjusting function. The obstacle navigation characteristic of weeding robot was simulated by ADAMS. Its ability of crossing obstructions in convex, concave and oblique lands was researched and simulated. The results showed that the robot could move on these three typical lands with excellent adaptability.
Number of references:12
Main heading:Robots
Controlled terms:Structural optimization
Uncontrolled terms:Inter-row weed - Intra-row weed - Simulation - Suspension structure - Weeding robots
Classification code:731.5 Robotics - 921.5 Optimization Techniques
DOI:10.6041/j.issn.1000-1298.2013.S1.047
Database:Compendex
92. Accession number:20134616980258
Title:Design and experiment on type 2BYM-12 folding and dynamic anti-blocking no-till planter
Authors:Yang, Zidong1 ; Liu, Ningning1 ; Geng, Duanyang1 ; Chai, Shan1 ; Ma, Mingjian1 ; Du, Ruicheng1
Author affiliation:1 School of Agricultural and Food Engineering, Shandong University of Technology, Zibo 255049, China
Corresponding author:Du, R. (drc@sdut.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:46-50
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:For the mechanization system of maize-wheat production in the north China plain, a basic planting specification was optimized which met the requirements of agricultural mechanized farming. The type 2BYM-12 folding and dynamic anti-blocking no-till maize planter had functions of seedling zone cleaning, dynamic anti-blocking, intelligent stepless adjustment to plant spacing, automatic testing farming quality and quantity of large scale precision seeder, adjustment to sowing depth, copying work and so on. Lightweight technology and hydraulic folding technology were adopted beneficial to agricultural machine field transfer and operation. Based on power matching calculation and load calculation, the type 2BYM-12 no-till planter was analyzed with finite element method. The calculation indicated that the stress distribution of no-till planter was similar to the actual situation, and satisfied the design requirements.
Number of references:13
Main heading:Agricultural machinery
Controlled terms:Agriculture - Automatic testing - Finite element method - Hydraulic machinery - Stress concentration
Uncontrolled terms:Agricultural machine - Field experiment - Lightweight technology - Load calculation - No-till - No-till planters - North China Plain - Stepless adjustment
Classification code:921.6 Numerical Methods - 821.1 Agricultural Machinery and Equipment - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 632.2 Hydraulic Equipment and Machinery - 423 Non Mechanical Properties and Tests of Building Materials - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties
DOI:10.6041/j.issn.1000-1298.2013.S1.009
Database:Compendex
96. Accession number:20134616980303
Title:Binding characteristics of cuticle and prism layer of cyclina sinensis
Authors:Ma, Yunhai1 ; Liu, Yucheng1 ; Peng, Jie1 ; Tong, Jin1 ; Wang, Zhiqin1 ; Gao, Xijun2
Author affiliation:1 Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
2 Engineering Training Center, Jilin University, Changchun 130022, China
Corresponding author:Ma, Y. (myh@jlu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:297-300 287
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to study the binding characteristics of cuticle and prism layer of Cyclina sinensis and apply it to improve the anti-corrosion performance of agricultural machinery, type-JSM-6700F scanning electron microscope and the revetest scratch tester of CSM instruments Revetest Xpress Plus were used to observe the surface microstructure and binding characteristics of cuticle and prism layer of Cyclina sinensis, respectively. The results showed that the binding characteristics of cuticle and prism layer was better when the spherical particles size of the back of Cyclina sinensis cuticle layer and the bore diameter of the prism layer surface were in the same range. The scratches of different parts of Cyclina sinensis cuticle surface existed a certain difference. The fluctuations of friction coefficient were large when horizontal scored and they were small when longitudinal scored. The results indicated that the binding characteristics of cuticle and prism layer was relatively better, especially the binding characteristics of cuticle and prism layer of Cyclina sinensis abdomen.
Number of references:11
Main heading:Prisms
Controlled terms:Agricultural machinery - Scanning electron microscopy
Uncontrolled terms:Anticorrosion performance - Binding characteristics - Cuticle layer - Cyclina sinensis - Friction coefficients - Spherical particle - Surface microstructures
Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 821.1 Agricultural Machinery and Equipment
DOI:10.6041/j.issn.1000-1298.2013.S1.054
Database:Compendex
97. Accession number:20134616980266
Title:Optimization of PID parameters for electro-hydraulic variable rate fertilization system based on genetic algorithm
Authors:Liang, Chunying1, 2 ; Lü, Peng2 ; Ji, Jianwei1 ; Wang, Xi3
Author affiliation:1 College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110161, China
2 College of Information Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China
3 College of Engineering, Heilongjiang Bayi Agricultural University, Daqing 163319, China
Corresponding author:Ji, J. (jianweiji7879@hotmail.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:89-93 88
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Aim to the problems of complicated adjustment of PID parameter, time-consuming and strongly empirical in variable rate fertilization system, genetic algorithm PID (GA-PID) tuning method was proposed to implement flexible parameter adjustment. By using Matlab/Simulink simulation, the square wave response of traditional PID and GA-PID system were compared. The results showed that GA-PID control strategy was superior to the conventional PID in response speed, overshoots, and setting time. System steady performance experiment was carried out at variable rate fertilization test bench. The results showed that GA-PID control algorithm of variable rate fertilization system was very accurate, the static error was small, and speed range linearity as good. GA-PID retrenched the process of parameter tuning and optimized the parameter tuning results.
Number of references:13
Main heading:Genetic algorithms
Controlled terms:Control systems - Optimization - Three term control systems
Uncontrolled terms:Control strategies - Electro-hydraulics - Matlab/Simulink simulation - Parameter adjustments - Parameter optimization - Square-wave response - Steady performance - Variable rate fertilization
Classification code:723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 921 Mathematics - 921.5 Optimization Techniques
DOI:10.6041/j.issn.1000-1298.2013.S1.017
Database:Compendex
98. Accession number:20134616980283
Title:Fast discrimination of adulterated Fenyangwang wine based on near infrared spectroscopy
Authors:Yang, Guoqiang1 ; Zhang, Shujuan2 ; Zhao, Yanru2
Author affiliation:1 Network Center, Shanxi Agricultural University, Taigu 030801, China
2 College of Engineering, Shanxi Agricultural University, Taigu 030801, China
Corresponding author:Zhang, S. (zsjuan@263.net)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:189-193
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to fast discriminate adulterated Fenyangwang wine, taking Fenyangwang wine with 53%vol of alcohol concentration as example, BP neural network and least squares support vector machine (LS-SVM) discriminant analysis models were established based on near infrared spectroscopy combined with chemometric methods. The spectra of 180 and 120 adulterated Fenyangwang wine samples were collected. Savitzky-Golay (SG) convolution smoothing was used to pre-treat the spectral data. Seven and eleven principal component factors were extracted respectively by using principal component analysis (PCA). Then, BP neural network and LS-SVM were used in discriminant analysis of unknown samples. Results showed that the accuracy of SG-PCA-BP neural network was up to 100%. The accuracy values of SG-PCA-LS-SVM models for two experimental groups were 84.4% and 83.3%, respectively.
Number of references:12
Main heading:Principal component analysis
Controlled terms:Discriminant analysis - Near infrared spectroscopy - Neural networks - Support vector machines - Wine
Uncontrolled terms:Adulteration - Alcohol concentrations - BP neural networks - Discriminant analysis model - Experimental groups - Least squares support vector machines - LS-SVM - Principal Components
Classification code:723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 801 Chemistry - 822.3 Food Products - 922 Statistical Methods - 922.2 Mathematical Statistics
DOI:10.6041/j.issn.1000-1298.2013.S1.034
Database:Compendex
100. Accession number:20134616980291
Title:Spatial locating method of apple fruits based on laser vision system
Authors:Feng, Juan1, 2 ; Zeng, Lihua1, 3 ; Liu, Gang1 ; Ma, Xiaodan1 ; Pang, Shujie4 ; Zhou, Wei1
Author affiliation:1 Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing 100083, China
2 College of Information Science and Technology, Agricultural University of Hebei, Baoding 071001, China
3 Mechanical and Electronic Engineering College, Agricultural University of Hebei, Baoding 071000, China
4 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Liu, G. (pac@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:236-239
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to guide robot arm to be close to apple target accurately, and avoid complex stereo matching of machine vision, a fruit locating method based on laser vision system was presented. According to the features of the system structure, scanning and motion controlling, a coordinate system of laser vision system was established, which was used to represent 3-D spatial information of target. Three different kinds of coordinate systems were transformed for offering directional data to robot arm, which separately belonged to image, laser vision system and robot arm. The grabbing experiment in orchard showed that the accurate grabbing ratio of robot arm was 100% while recognition index RRC was more than 90%.
Number of references:10
Main heading:Computer vision
Controlled terms:Fruits - Robotic arms - Stereo vision
Uncontrolled terms:Apple - Co-ordinate transformation - Laser vision - Robot arms - Spatial location
Classification code:723.5 Computer Applications - 731.5 Robotics - 821.4 Agricultural Products
DOI:10.6041/j.issn.1000-1298.2013.S1.042
Database:Compendex
01. Accession number:20134616980259
Title:Design and experiment of type 9BQS-3.0 pneumatic scarifying and sowing compound operation machine
Authors:Luo, Jinhai1 ; Sun, Jiamin2 ; Yang, Li1 ; Wang, Zhenhua1 ; Li, Wenguang1 ; Dong, Zhongyi1
Author affiliation:1 Huhhot Branch, Chinese Academy of Agricultural Mechanization Sciences, Huhhot 010010, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Luo, J. (richard2008ljh@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:51-55 66
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The basic structure and work principal of the type 9BQS-3.0 pneumatic scarifying and sowing compound operation machine were introduced. The general structure, shallow scarifying device, press roller and metering device were designed and computed. The experiment results indicated that the seeder had good performance and reasonable structure. The soil broken rate was 94.5%. The bulking intensity of shallow scarifying layer was 63%. The seed broken ratio of elymus dahuricus was 1.2%. The seeder could perform the compound operation of scarifying, furrowing, seeding, covering soil and flatting simultaneously.
Number of references:10
Main heading:Experiments
Controlled terms:Design - Pneumatics
Uncontrolled terms:Basic structure - Compound operation - Furrow openers - General structures - Metering devices - Pasture - Press rollers - Shallow scarification
Classification code:408 Structural Design - 632.3 Pneumatics - 901.3 Engineering Research
DOI:10.6041/j.issn.1000-1298.2013.S1.010
Database:Compendex
102. Accession number:20134616980277
Title:Effects of liquid hot water pretreatment on rice straw-wood composites
Authors:Luo, Peng1 ; Yang, Chuanmin1 ; Yang, Changliang1 ; Wang, Jiazheng1 ; Zhong, Silin1 ; Zhao, Denghui1
Author affiliation:1 School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China
Corresponding author:Yang, C. (ychmin@tjcu.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:156-158 142
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Rice straw, whose outer surface is covered by silica, has relative higher ash content. 100% pure rice straw panel board manufactured with conventional low cost urea formaldehyde (UF) was featured by low strength, poor dimensional stability and high resin requirement. This work employed liquid hot water to pretreat rice straw, with pretreatment temperature of 160°C and 170°C and residence time of 2 min, 4 min and 6 min. The pretreated rice straw was mixed with wood particle at the ratio of 1:1 by using UF to produce rice straw-wood composite with 0.75 g/cm3 density. The hot press temperature and pressure were 150°C and 3.5 MPa, respectively. The resin application level was 12%. The experimental results indicated that the panel board made with rice straw pretreated under 160°C for 6 min and 170°C for 4 min and 6 min met the requirement of China national standard for particleboard GB/T 4897-2003.
Number of references:9
Main heading:Liquids
Controlled terms:Composite materials - Resins - Water - Wood products
Uncontrolled terms:Application level - Hot-press temperature - Liquid hot water - Liquid hot water pretreatment - National standard - Pretreatment temperature - Rice straws - Urea formaldehyde
Classification code:951 Materials Science - 931.2 Physical Properties of Gases, Liquids and Solids - 815.1.1 Organic Polymers - 811.2 Wood and Wood Products - 811 Cellulose, Paper and Wood Products - 444 Water Resources - 415 Metals, Plastics, Wood and Other Structural Materials
DOI:10.6041/j.issn.1000-1298.2013.S1.028
Database:Compendex
103. Accession number:20134616980302
Title:Investigation of noise mechanism based on owl wing
Authors:Ge, Changjiang1 ; Ge, Meichen2 ; Liang, Ping1 ; Zhang, Zhihui1 ; Ren, Luquan1
Author affiliation:1 Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
2 Institute of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
Corresponding author:Ge, C. (mygongbo@gmail.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:292-296
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A bionic airfoil based on a silent-fight long-eared owl wing was built by using root mean square. The flow structure around the owl wing and the related source were revealed. The unsteady flow showed that a leading-edge boundary layer was separated, and later a bubble was formed due to instability. Furthermore, a vortex detached from the bubble, drifted downstream, and immediately broke down later. A turbulent boundary layer was reattached on the upper surface. A similar evolution occurred on the lower surface, but the vortex drifted further downstream. The corresponding far-field directivities suggested dipole noise and the maximum intensity was at the trailing edge. It suggested that the scattering noise was dominant. In the spectrum, the noise was mainly concentrated in the mid frequency and the tonal characteristics also agreed with the flow structure. The noise of the bionic airfoil started to drop significantly around 1 kHz, and the similar trend was also gained for the natural owl wing with decrease above 2 kHz.
Number of references:12
Main heading:Birds
Controlled terms:Airfoils - Biomimetics - Bionics - Flow structure - Scattering - Unsteady flow - Vortex flow
Uncontrolled terms:Engineering bionics - Leading-edge boundary layers - Maximum intensities - Mid-frequencies - Noise mechanisms - Root Mean Square - Scattering noise - Turbulent boundary layers
Classification code:461 Bioengineering and Biology - 631.1 Fluid Flow, General - 652.1 Aircraft, General - 711 Electromagnetic Waves - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 822 Food Technology
DOI:10.6041/j.issn.1000-1298.2013.S1.053
Database:Compendex
107. Accession number:20134616980276
Title:Energy consumption test and process optimization for circular mold briquetting machine
Authors:Duan, Jian1 ; Chen, Shuren1 ; Yao, Yong2 ; Jiang, Xiaoxia1
Author affiliation:1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China
2 Jiangsu Yuantong Machinery Co., Ltd., Zhenjiang 212325, China
Corresponding author:Chen, S. (srchen@ujs.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:149-155
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Compression modeling tests were performed by taking a 9JYK-2000A circular mold briquetting machine as testing apparatus and rice straw as the raw material. According to the experimental result, the effect rules of craft parameters on the energy consumption per ton solid biofuel of straw briquetting machine were analyzed, and the optimal parameter combination was obtained. Based on the Design-Expert 8.0.6 regression analysis method and response surface method, a mathematical model was established by taking fuel consumption per ton as response, to analyze the influence of the four factors, named the moisture content, operation temperature, clearances between rolls and die and the spindle speed. The result indicated that when the raw material had the moisture content of (23.92±3)%, operation temperature of 84.5°C, the gap of roll-die of 2.47 mm and the spindle speed of 160.8 r/min, the relax density mean was 1.023 g/cm3, and the energy consumption per ton was 27.10 kW·h/t. The order of contribution rate of every experiment factor on target index was obtained as follows: spindle speed, moisture content, clearances between rolls and die, operation temperature. The relative error between the calculated values and experimental values was 4.50%, which proved that the regression model equations could be used to predict the fuel consumption per ton of circular mold briquetting machine.
Number of references:20
Main heading:Briquetting
Controlled terms:Energy utilization - Experiments - Mathematical models - Moisture determination - Molds - Optimization - Process control - Regression analysis
Uncontrolled terms:Calculated values - Compression model - Experimental values - Operation temperature - Optimal parameter combinations - Regression analysis methods - Response surface method - Testing apparatus
Classification code:944.2 Moisture Measurements - 922.2 Mathematical Statistics - 921.5 Optimization Techniques - 921 Mathematics - 901.3 Engineering Research - 816.2 Plants and Machinery for Plastics and Other Polymers - 731 Automatic Control Principles and Applications - 525.3 Energy Utilization - 524 Solid Fuels
DOI:10.6041/j.issn.1000-1298.2013.S1.027
Database:Compendex
109. Accession number:20134616980263
Title:Effects of seed pre-soaking on sowing performance by pneumatic precision metering device for rapeseed
Authors:Liao, Yitao1 ; Huang, Haidong1 ; Li, Xu1 ; Yu, Jiajia1 ; Yan, Qiuyan1 ; Liao, Qingxi1
Author affiliation:1 College of Engineering, Huazhong Agricultural University, Wuhan 430070, China
Corresponding author:Liao, Q. (liaoqx@mail.hzau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:72-76
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Metering performances in a pneumatic seeder of rapeseed processed with different pre-soaking methods, including pre-soaking in warm water, cold water and without pre-soaking, were investigated to estimate whether sowing mechanization could be applied into the seeds qualified to agronomic requirement of pre-soaking. The results indicated that mechanical and physical properties of rapeseed had obvious change after soaking, which could be characterized by softened seed coat and increased 1000-grain weight and plumpness. Additionally, residual modulus degraded by 40%, the cracking load decreased by 10% and the cracking deformation aggrandized by 20%. When the rotational speed of seeder was slower than 36 r/min, the sowing-performance as the quality of feed index for the three kinds of seed were more than 95%, while the miss index were less than 4%. Although the mechanical properties appeared degraded, the seeder never destructed the appearance and germinating ability of seeds. The results of the research concluded that rapeseed under pre-soaking would suitable for sowing mechanization with the pneumatic metering technology employed both positive and negative pressure.
Number of references:15
Main heading:Oilseeds
Controlled terms:Cracks - Machinery - Mechanical properties - Mechanization - Physical properties - Pneumatics
Uncontrolled terms:Mechanical and physical properties - Precision metering - Rapeseed - Soaking - Sowing performance
Classification code:421 Strength of Building Materials; Mechanical Properties - 601 Mechanical Design - 632.3 Pneumatics - 821.4 Agricultural Products - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
DOI:10.6041/j.issn.1000-1298.2013.S1.014
Database:Compendex
111. Accession number:20134616980299
Title:Oestrus detection and prediction in dairy cows based on neural networks
Authors:Tian, Fuyang1 ; Wang, Ranran1 ; Liu, Mochen1 ; Wang, Zhen1 ; Li, Fade1 ; Wang, Zhonghua2
Author affiliation:1 College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China
2 College of Animal Science and Technology, Shandong Agricultural University, Taian 271018, China
Corresponding author:Li, F. (lifade@sdau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:277-281
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:It is important to detect cow oestrus in time and accurately. According to the characteristics of increasing activity, shorter repose time and increasing animal heat during cow oestrus, vibrational sensor and temperature sensor were used to detect the above parameters. LVQ neural network model was built, which taking walking steps, repose time and animal heat as input, and behavior characteristics as output. The results showed that, with the proposed algorithm, the correct detection rate was up to 100%, and prediction rate for oestrus was more than 70%.
Number of references:15
Main heading:Neural networks
Controlled terms:Animals - Error detection
Uncontrolled terms:Behavior characteristic - Dairy cow - Detection rates - LVQ neural network - Oestrus - Prediction rate - Walking steps
Classification code:822 Food Technology - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 814 Leather and Tanning - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 471 Marine Science and Oceanography - 461.1 Biomedical Engineering - 461 Bioengineering and Biology
DOI:10.6041/j.issn.1000-1298.2013.S1.050
Database:Compendex
114. Accession number:20134616980295
Title:On-line detection of apple surface defect based on image processing method
Authors:Zhao, Juan1 ; Peng, Yankun1 ; Dhakal, Sagar1 ; Zhang, Leilei1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:Peng, Y. (ypeng@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:260-263
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:A machine vision system for detecting bruise on apple surface was developed. The system was consisted of single-channel transfer unit, image acquisition unit and classification unit. A CCD camera with a 635 nm filter and two plane mirrors were used to acquire the image of overall surface of apple sample. The system was designed to rotate apple at three different positions in the conveyor running, acquiring nine images of same apple. Digital image processing method was used to analyze sample defects. Ratio between black pixels and all pixels was calculated and compared with a fit value to judge the bruise area. The detection accuracy of the system for sample was 92.5%.
Number of references:15
Main heading:Fruits
Controlled terms:Computer vision - Image processing - Pixels - Surface defects
Uncontrolled terms:Apple - Detection accuracy - Digital image - Image processing - methods - Machine vision systems - On-line detection - Plane mirrors - Single-channel
Classification code:421 Strength of Building Materials; Mechanical Properties - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 741.2 Vision - 821.4 Agricultural Products - 951 Materials Science
DOI:10.6041/j.issn.1000-1298.2013.S1.046
Database:Compendex
115. Accession number:20134616980251
Title:Design and experiment of full-row-pick-up and single-dropping seedling transplanter
Authors:Yan, Xiaoyue1 ; Hu, Jianping1 ; Wu, Fuhua1 ; Miao, Xiaohua1 ; He, Junyi1
Author affiliation:1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Hu, J. (hujp@ujs.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:7-13
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:To improve the automation and efficiency of plug seedling transplanter, a full-row-pick-up and single-dropping seedling transplanter was designed based on the type-PVHR2 semi-automatic transplanter with rotary seedling-received cup device. The seedling pick-up end-effector system performed the removal of total number of seedlings in a row and dropped them individually into their cups. The rotary-lifting mechanism was used to help the end-effector to move down to pick the seedlings from the tray upwards, rotate at 90° to drop the seedlings into the cups, and reverse at 90° to the upside of tray. With the principle of fully picking the row seedlings and dropping them one-by-one in mind, seedling pick-up unit driven cam contours were designed to open and close the pick-up units. Based on the transplanting requirements, motion matching and timing control of the mechanism and the cams were carried out to ensure proper coordination in the transplanter. Automatic transplanting experiments for the 72-hole plug cucumber seedlings with the age of 28 d showed that the designed mechanism was reliable with a success pick-up rate of 95% at pick-up speed of 3600 seedlings/h, pick-up embedded depth of 27 mm, and pick-up angle of 10°.
Number of references:18
Main heading:Pickups
Controlled terms:Design - Experiments
Uncontrolled terms:Embedded depth - End-effector systems - Full-row-pick-up - Plug seedling - Semi-automatics - Single-dropping - Timing control - Transplanter
Classification code:408 Structural Design - 752.3.1 Sound Reproduction Equipment - 901.3 Engineering Research
DOI:10.6041/j.issn.1000-1298.2013.S1.002
Database:Compendex
117. Accession number:20134616980294
Title:Color model analysis and recognition for parts of citrus based on exploratory data analysis
Authors:Peng, Hongxing1, 2 ; Zou, Xiangjun1 ; Guo, Aixia1 ; Xiong, Juntao1 ; Chen, Yan1
Author affiliation:1 Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
2 School of Information, South China Agricultural University, Guangzhou 510642, China
Corresponding author:Zou, X. (xjzou1@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:253-259 235
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Aiming at the characteristics of various parts of mature citrus, uncertainty and variability of light and environment, various parts of citrus image data had been conducted to exploratory data analysis and identify. The characteristics of exploratory data analysis method and the principle of citrus recognition based on color channel were analyzed. The flow chart of exploratory data analysis of citrus image data was provided. The acquired citrus images were divided into three different lighting conditions: front-lighting, normal light and backlighting. The image data of citrus fruits, stems and leaves were collected. According to the image data, the sorted box-plot on color component for all parts of citrus based on six kinds of color space were designed. With data analysis about the graphics of box-plot, a vision model of recognition of different parts of citrus was given based on I2 color component of I1I2I3 color space. When the threshold value of I2 was 0.3, the branches, the leaves and the grass in complex background could be removed and thus citrus fruits and their background could be segregated. Finally, 300 differently illuminated citrus images were collected in natural circumstance as test objects, all rip citrus fruits were effectively recognized based on the vision model of I2 color feature, and the citrus fruits recognition ratio was 98.4%. Also the situation was confirmed that the fruit stems and leaves could not be distinguished only relying on color feature because of their similarity color.
Number of references:15
Main heading:Uncertainty analysis
Controlled terms:Citrus fruits - Color - Color codes - Color image processing - Image classification - Lighting
Uncontrolled terms:Citrus - Color modeling - Complex background - Exploratory data analysis - Lighting conditions - Recognition - Recognition ratio - Uncertainty and variability
Classification code:706.2 Electric Power Lines and Equipment - 707 Illuminating Engineering - 716 Telecommunication; Radar, Radio and Television - 741.1 Light/Optics - 821.4 Agricultural Products - 922.1 Probability Theory
DOI:10.6041/j.issn.1000-1298.2013.S1.045
Database:Compendex
121. Accession number:20134616980278
Title:Non-invasive detection to TVC and color of chilled pork based on Vis/NIR spectroscopy
Authors:Zhang, Leilei1 ; Peng, Yankun1 ; Liu, Yuanyuan1, 2 ; Zhao, Juan1 ; Guo, Hui1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
2 College of Mechanic and Electrical Engineering, Tarim University, Alar 843300, China
Corresponding author:Peng, Y. (ypeng@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:159-164
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Vis/NIR spectroscopy was used to detect TVC and color of chilled pork rapidly and non-invasively. Vis/NIR scattering image in the range of 400 nm to 1100 nm were collected from 54 chilled pork samples. The scattering profiles were fitted accurately by four-parameter Gompertz function. The TVC and color L* prediction models were built with support vector machines (SVM) regression. The regression coefficient (Rv) of combination α, β, θ, δ and combination α, β, δ were 0.937 and 0.935, and the standard error of prediction (SEP) were 0.600 lg CFU/g and 0.702 lg CFU/g, respectively. For color L*, the prediction model based on combination β and δ could give satisfactory results with Rv of 0.930 and SEP of 1.515. The results demonstrated that Vis/NIR spectroscopy combined with SVM was precise and potential for valid, rapid, non-invasive detection of chilled pork.
Number of references:16
Main heading:Support vector machines
Controlled terms:Color - Mathematical models - Meats - Scattering
Uncontrolled terms:Chilled pork - Non-invasive detection - Regression coefficient - Scattering profiles - Standard error of prediction - Support vector machines regression - Total viable counts - Vis/NIR spectroscopy
Classification code:723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 822.3 Food Products - 921 Mathematics
DOI:10.6041/j.issn.1000-1298.2013.S1.029
Database:Compendex
130. Accession number:20134616980261
Title:Finite element analysis and experiment on anti-blocking device based on support cutting
Authors:Lu, Caiyun1 ; He, Jin1 ; Li, Hongwen1 ; Wang, Qingjie1 ; Zhang, Xiangcai1 ; Liu, Jun'an1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
Corresponding author:He, J. (hejin@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:61-66
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:When planted in one year two crop area of China, it is important to reduce energy consumption and improve planting performance, and ensure the anti-blocking performance as well. When the support cutting was carried out, the cutting force needed became smaller because some of it was got from external force. Taking support cutting device-floated support anti-blocking device as research object, the static strength finite element analysis of key components blade and support plate was conducted with ANSYS software. The load of blade came from resistance of cutting straw and soil, and the load of support plate came from holding power of straw and soil. On the basis of established finite element model, a series of stress figures were obtained after calculation. The result indicated that the stress of blade mainly focused on x>0 area of right hole heart, and the area from hole heart to turning place. The maximum of equivalent stress was 2151.2 Pa. The stress of support plate mainly focused on arc plate area and flat plate area closed to the arc plate side. The maximum of equivalent stress was 3.77×105 Pa. The field experiment showed that the machine had a good working performance and deformation was not found on the blade and support plate.
Number of references:14
Main heading:Finite element method
Controlled terms:Energy utilization
Uncontrolled terms:Anti-blocking device - Equivalent stress - Field experiment - No-till planters - Reduce energy consumption - Research object - Static strength - Working performance
Classification code:525.3 Energy Utilization - 921.6 Numerical Methods
DOI:10.6041/j.issn.1000-1298.2013.S1.012
Database:Compendex
131. Accession number:20134616980275
Title:Exergy analysis on gas production from biomass gasification
Authors:Wang, Liqun1 ; Chen, Zhaosheng1
Author affiliation:1 School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
Corresponding author:Wang, L. (thulq2000@163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:143-148
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Biomass gasification was performed on a fluidized bed reactor with steam as gasifying agent. Two-stage gasification processes in a fluidized bed were adopted. This research aimed to determine the effects of reaction temperature and steam-to-biomass ratio (u) on exergy distribution, chemical exergy, physical exergy and exergy efficiency of the product gas, and residual ratio and exergy efficiency of the unreacted carbon, etc. Over the ranges of the test conditions used, chemical exergy varied from 10832.13 kJ/kg to 16510.54 kJ/kg, physical exergy ranged between 685.05 kJ/kg and 1 146.71 kJ/kg chemical exergy/physical exergy ratio varied from 13.5 to 17.7, and exergy efficiency of product gas ranged between 35.52% and 60.78%. The results showed that the top two contributions of gas component to exergy value were H2 and CO. With the increase of reaction temperature, chemical exergy, physical exergy and exergy efficiency of the product gas increased, whilst chemical exergy/physical exergy ratio, and residual ratio and exergy efficiency of the unreacted carbon decreased correspondingly. The exergy value and efficiency of the product gas first increased and then decreased with the increase in u. An optimal value of u should be chosen between 1.2 and 1.6.
Number of references:17
Main heading:Exergy
Controlled terms:Biomass - Carbon - Efficiency - Fluid catalytic cracking - Fluidized beds - Gases - Gasification
Uncontrolled terms:Biomass Gasification - Exergy Analysis - Exergy efficiencies - Fluidized bed reactors - Gasification process - Gasifying agents - Reaction temperature - Residual ratios
Classification code:525.1 Energy Resources and Renewable Energy Issues - 641.1 Thermodynamics - 802 Chemical Apparatus and Plants; Unit Operations; Unit Processes - 804 Chemical Products Generally - 913.1 Production Engineering - 931.2 Physical Properties of Gases, Liquids and Solids
DOI:10.6041/j.issn.1000-1298.2013.S1.026
Database:Compendex
137. Accession number:20134616980255
Title:Analysis of influencing factors on force of picking plug seedlings and pressure resistance of plug seedlings
Authors:Miao, Xiaohua1 ; Mao, Hanping1 ; Han, Lühua1 ; Sun, Hui1 ; Yang, Xuejun2 ; Huang, Hua2
Author affiliation:1 Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang 212013, China
2 State Key Laboratory of Soil-Plant-Machine System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
Corresponding author:Mao, H. (maohp@ujs.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:27-32
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The core of automatic transplanter is automatically and efficiently picking seedlings. Besides the mechanical structural factors, many other factors, like mechanical properties of seedlings, would affect the successful transplanting rate. Taking cucumber plug seedlings as object, the experiments of clipping and picking seedlings for measuring the picking seedlings force, and gripping seedlings for measuring pressure resistance of seedlings were carried out. The orthogonal experimental design was used to analyze the effect of filling amount, substrate composition, and moisture content on the force of picking seedlings and pressure resistance of seedlings. The experiment results showed that the above three factors all had significant effect on force of picking seedlings and pressure resistance of seedlings. The order from high to low was: filling amount, substrate composition and moisture content for force of picking seedlings, and moisture content, substrate composition and filling amount for pressure resistance of seedlings. The optimum working conditions were as follows: substrate for each cell of 33.5 cm3, substrate composition with peat, vermiculitel and perlitel (volume ratio of 3:1:1), and moisture content of 65%. These optimum working conditions were accordance with results of comprehensive score obtained by experiment on picking seedling machine.
Number of references:15
Main heading:Pressure effects
Controlled terms:Experiments - Filling - Mechanical properties - Moisture determination - Substrates
Uncontrolled terms:High-to-low - Optimum working conditions - Orthogonal experimental design - Plug seedling - Pressure resistance - Structural factor - Substrate composition - Volume ratio
Classification code:461 Bioengineering and Biology - 691.2 Materials Handling Methods - 801 Chemistry - 901.3 Engineering Research - 931.1 Mechanics - 944.2 Moisture Measurements
DOI:10.6041/j.issn.1000-1298.2013.S1.006
Database:Compendex
139. Accession number:20134616980265
Title:Design and experiment of sliding-knife-type disc opener
Authors:Zhuang, Jian1, 2 ; Jia, Honglei2 ; Ma, Yunhai1, 2 ; Li, Yang1, 2 ; Di, Yingkai1, 2
Author affiliation:1 Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China
2 College of Biological and Agricultural Engineering, Jilin University, Changchun 130025, China
Corresponding author:Jia, H. (jiahl@vip.163.com)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:83-88
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Sliding-knife-type disc opener was designed with combination structure characteristic of disc opener and slide-knife opener. The diameter, gap contour curve and quantity of sliding-knife-type disc opener were determined by calculation. The interaction of sliding-knife-type disc opener and soil were simulated by LS-DYNA module of ANSYS. The results of field trials showed that sliding-knife-type disc opener had excellent buried and broken stubble abilities.
Number of references:14
Main heading:Cultivation
Controlled terms:Soil conservation
Uncontrolled terms:Conservation tillage - Corn - Disc opener - No tillage - Sliding-knife-type gap
Classification code:821.3 Agricultural Methods
DOI:10.6041/j.issn.1000-1298.2013.S1.016
Database:Compendex
144. Accession number:20134616980286
Title:Detection of decay and disease pear jujube based on hyperspectral imaging technology
Authors:Wang, Bin1 ; Xue, Jianxin1 ; Zhang, Shujuan1
Author affiliation:1 College of Engineering, Shanxi Agricultural University, Taigu 030801, China
Corresponding author:Zhang, S. (zsujuan@263.net)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:205-209
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:The classified feasibility of pear jujube with normal, rot and disease defect fruit by using hyperspectral imaging technology was analyzed. A best mathematical model was established by treating first derivative as the best pre-processing which was compared with other different kinds of proceeding methods. The stepwise discriminant analysis and least square support vector machines (LS-SVM) were applied to build the full-wave band, approximation coefficients and principal components models, respectively. The results indicated that the stepwise discriminant analysis model was more suitable for classifying the three different kinds of pear jujube samples. The average correct recognition rate was 99.12%.
Number of references:15
Main heading:Fruits
Controlled terms:Classification (of information) - Decay (organic) - Discriminant analysis - Imaging techniques - Mathematical models - Spectroscopy - Support vector machines
Uncontrolled terms:Approximation coefficients - First derivative - HyperSpectral - Hyperspectral imaging technologies - Least square support vector machines - Pear jujube - Principal Components - Stepwise discriminant analysis
Classification code:922 Statistical Methods - 921 Mathematics - 821.4 Agricultural Products - 801.2 Biochemistry - 801 Chemistry - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 723 Computer Software, Data Handling and Applications - 716.1 Information Theory and Signal Processing
DOI:10.6041/j.issn.1000-1298.2013.S1.037
Database:Compendex
146. Accession number:20134616980260
Title:Monitoring system of pneumatic no-tillage sower based on PIC single-chip microcomputer control
Authors:Wang, Zhenhua1, 2 ; Li, Wenguang2 ; Zhai, Gaixia2 ; Li, Zhijie2 ; Zhang, Xin2 ; Wang, Decheng1
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Huhhot Branch, Chinese Academy of Agricultural Mechanization Sciences, Huhhot 010010, China
Corresponding author:Wang, D. (wdc@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:56-60
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:Aim at avoiding seed missing and enhancing working quality of sower, based on the PIC single-chip microcomputer control technology, a monitoring system was designed and applied to monitor the pneumatic no-tillage sower's performance. The general structure and system circuit of the pneumatic sower monitoring system were designed, and the correlation parameters were set. The fan rotational speed, walking speed, planting area, and material level of pneumatic seeder were monitored real-timely by using the monitoring system. The experimental results showed that the pneumatic sower monitoring system had high precision measurement accuracy. It could complete real-time monitoring of working process.
Number of references:10
Main heading:Pneumatics
Controlled terms:Computers - Microcomputers - Monitoring - Sensors
Uncontrolled terms:Correlation parameters - General structures - High-precision measurement - Monitoring system - No-tillage seeders - Real time monitoring - Rotational speed - Single chip microcomputers
Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 801 Chemistry - 723 Computer Software, Data Handling and Applications - 722.4 Digital Computers and Systems - 722 Computer Systems and Equipment - 632.3 Pneumatics
DOI:10.6041/j.issn.1000-1298.2013.S1.011
Database:Compendex
151. Accession number:20134616980292
Title:Design and target extraction of intelligent grape bagging robot
Authors:Zhang, Kai1 ; Zhao, Lining1 ; Sun, Zhe1 ; Geng, Changxing1 ; Li, Wei1
Author affiliation:1 Beijing Modern Agricultural Equipment Optimize Design Laboratory, China Agricultural University, Beijing 100083, China
Corresponding author:Li, W. (liww@cau.edu.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:240-246
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:In order to improve the intelligent level of grape bagging and reduce the amount of human labor, a robot system for grape bagging was developed. The hardware structure of robot system was designed based on cylindrical coordinate. A method was proposed in order to get target feature extraction and recognition method by genetic algorithm. Compared with the proposed algorithm, the segmentation method using morphology algorithm and BP neural network under the HSI color space needed more time. The result of experiments showed that when the velocity of platform was 0.3 m/s, the recognition rate for grape was up to 95% and the average time-consuming was about 136 ms. The grape bagging robot success rate was 85% and the average time-consuming for a cluster of grapes was 39.6 s.
Number of references:17
Main heading:Machine design
Controlled terms:Algorithms - Computer vision - Intelligent control - Intelligent robots - Neural networks
Uncontrolled terms:BP neural networks - Cylindrical coordinates - Hardware structures - Intelligent level - Morphology algorithms - Segmentation methods - Structure design - Target feature extraction
Classification code:601 Mechanical Design - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 731.6 Robot Applications - 921 Mathematics
DOI:10.6041/j.issn.1000-1298.2013.S1.043
Database:Compendex
152. Accession number:20134616980250
Title:Analysis and parameter optimization for vegetable plug seedling pick-up mechanism
Authors:Jin, Xin1 ; Li, Shujun2 ; Yang, Xuejun3 ; Sun, Xing3 ; Yan, Hua3 ; Wu, Jianmin3
Author affiliation:1 College of Engineering, China Agricultural University, Beijing 100083, China
2 Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China
3 The Modern Agricultural Equipment Co., Ltd., Beijing 100083, China
Corresponding author:Li, S. (lisj@caams.org.cn)
Source title:Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
Abbreviated source title:Nongye Jixie Xuebao
Volume:44
Issue:SUPPL.1
Issue date:October 1, 2013
Publication year:2013
Pages:1-6 13
Language:Chinese
ISSN:10001298
CODEN:NUYCA3
Document type:Journal article (JA)
Publisher:Chinese Society of Agricultural Machinery, No. 1 Beishatan Deshengmen Wai, Beijing, 100083, China
Abstract:During the vegetable transplanting for the existing vegetable semi-automatic transplanter, the plug seedlings picking and feeding are nearly dependent on manual work, so the work efficiency is very low. Aiming at this problem, a vegetable plug seedling automatic pick-up mechanism was designed. The motion and dynamic mathematical model were established. Moreover, the influences over the mechanism motion and dynamic characteristic by some important parameters were analyzed by using the parametric models. The design of optimization objective for automatic picking vegetable plug seedlings was proposed. And then, the range of mechanism parameter which met the requirements of the motion trajectory for plug seedling picking was obtained. In addition, the dynamic analysis for the pick-up mechanism was carried out based on the range. Meanwhile, taking the minimal force wave of mechanism bearing as optimization objective, the optimal parameter combination of pick-up mechanism was obtained. With these parameters, the plug seedling pick-up mechanism processed better the motion trajectory and better dynamic performance which met the demands of seedling picking.
Number of references:12
Main heading:Pickups
Controlled terms:Dynamics - Optimization - Vegetables
Uncontrolled terms:Dynamic characteristics - Dynamic mathematical model - Mechanism-parameters - Motion characteristics - Motion trajectories - Optimal parameter combinations - Parameter optimization - Plug seedling
Classification code:752.3.1 Sound Reproduction Equipment - 821.4 Agricultural Products - 921.5 Optimization Techniques - 931.1 Mechanics
DOI:10.6041/j.issn.1000-1298.2013.S1.001
Database:Compendex
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