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基于PLC的變量施肥控制系統(tǒng)設(shè)計(jì)與試驗(yàn)
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    摘要:

    提出了一個(gè)以PLC為主機(jī)，集成光學(xué)傳感器和控制裝置的變量施肥控制系統(tǒng)。根據(jù)實(shí)時(shí)監(jiān)測(cè)的作物光譜信息和施肥機(jī)具的實(shí)際前進(jìn)速度調(diào)節(jié)施肥量。系統(tǒng)采用無損測(cè)試技術(shù)和模糊控制算法，通過歸一化植被差異指數(shù)測(cè)量?jī)x實(shí)時(shí)獲取歸一化植被差異指數(shù)，結(jié)合施肥機(jī)具行進(jìn)速度調(diào)節(jié)執(zhí)行機(jī)構(gòu)中的電磁閥，實(shí)現(xiàn)實(shí)時(shí)變量施肥。

    Abstract:

    A real-time control system of the automatic variable rate fertilizer applicator was presented. The control system takes PLC as the mainframe, and integrates with the optical sensor and automatic control equipment. The quantity of fertilizer was adjusted with the tractor speed and the crop spectrum data by real-time measuring. The technology of non-destructive test and the fuzzy control algorithm was adopted in the system. According to the speed of the tractor and the real-time value of NDVI (normalized difference vegetative index) from NDVI equipment, the real time variable rate fertilizer was realized via opening or closing the electromagnetic valves of the system.

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邵利敏,王秀,牛曉穎,錢東平.基于PLC的變量施肥控制系統(tǒng)設(shè)計(jì)與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2007,38(11):84-87.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(11):84-87.

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