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EC-5土壤水分傳感器溫度影響機理及補償方法研究
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Temperature Effect Mechanism and Compensation Method of EC-5 Soil Moisture Sensor
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    摘要:

    針對EC-5傳感器溫度實驗中出現(xiàn)的兩種截然不同現(xiàn)象,根據(jù)溫度對土壤介電常數(shù)和電導率影響的機理分析,建立土壤水分傳感器測試結果隨溫度變化的理論模型。通過對模型的仿真分析發(fā)現(xiàn),EC-5傳感器測得的土壤水分含量隨溫度變化的趨勢與土壤電導率密切相關。利用最小二乘支持向量機對傳感器的溫度實驗數(shù)據(jù)建立補償函數(shù)并提出相應補償算法,有效地抵消了溫度變化造成的傳感器測試誤差。

    Abstract:

    Aiming at the two distinct phenomena appeared in the EC-5 sensor temperature experiment, a theoretical model on variation of soil moisture content with temperature was established according to the influence of temperature on soil permittivity and electrical conductivity. The simulation based on the model shows that the variation tendency of soil moisture content with temperature measured by the EC-5 sensor is closely related to the soil electrical conductivity. Using least squares support vector machine, the sensor temperature compensation function was built and corresponding compensation algorithm was proposed. The results of the experiment indicate that the sensor measurement errors caused by temperature are effectively offset.

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張榮標,劉駿,張磊,余功江. EC-5土壤水分傳感器溫度影響機理及補償方法研究[J].農業(yè)機械學報,2010,41(9):168-172.Temperature Effect Mechanism and Compensation Method of EC-5 Soil Moisture Sensor[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(9):168-172.

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