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基于電容法的稻谷含水率檢測
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國家自然科學基金面上項目(30971698);湖南科技學院“電路與系統(tǒng)”重點建設(shè)學科資助項目


Moisture Content Detection of Paddy Rice Based on Capacitance Approach
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    摘要:

    為快速準確測量稻谷含水率，設(shè)計了一種單一平面電容傳感器探頭,，并應用電容數(shù)字轉(zhuǎn)換芯片AD7150設(shè)計轉(zhuǎn)換電路,。傳感器探頭將稻谷含水率轉(zhuǎn)換成電容,，轉(zhuǎn)換電路將電容模擬量轉(zhuǎn)換成數(shù)字量,，經(jīng)單片機處理后獲得稻谷含水率,。對傳感器進行了標定試驗和溫度特性試驗,，結(jié)果表明稻谷含水率在8%~23%的范圍里,，含水率預測誤差為±0.8%,；溫度在12~33℃范圍內(nèi)，稻谷含水率為12.86%時,，溫度漂移量為0.2%/℃,。

    Abstract:

    In order to quickly detect rice moisture content, a uniplanar capacitor probe was designed. A corresponding converting circuit was also designed for getting digital value of capacitance. The rice moisture content was converted into capacitance and digital value in turn by the capacitor probe and converting circuit. Finally, the rice moisture content was obtained by using single chip. After the calibration experiments and temperature characteristics experiments, the results showed that prediction error of moisture content was within ±0.8% at the range of rice moisture content of 8%~23%. With the temperature of 12~33℃ and rice moisture content of 12.86%, the temperature shift value was 0.2%/℃.

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劉志壯,呂貴勇.基于電容法的稻谷含水率檢測[J].農(nóng)業(yè)機械學報,2013,44(7):179-182. Liu Zhizhuang, Lü Guiyong. Moisture Content Detection of Paddy Rice Based on Capacitance Approach[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(7):179-182.

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  • 在線發(fā)布日期: 2013-06-20
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