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稻谷干燥含水率在線檢測裝置設(shè)計(jì)與試驗(yàn)
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    摘要:

    為了解決稻谷的形狀,、厚度,、密度、溫度波動以及內(nèi)部水分分布不均等因素影響含水率測量的問題,實(shí)現(xiàn)單粒稻谷水分在線精確測量,,研究了稻谷干燥水分在線檢測技術(shù)及裝置。利用多路復(fù)選測量方案與解析計(jì)算相結(jié)合的方法,解決了稻谷含水率測量非線性問題。將動態(tài)過程中的轉(zhuǎn)換電壓時序曲線圖峰高作為含水率在23.5%以下時的測量屬性,;當(dāng)含水率在23.5%以上時,測量屬性采用時序曲線峰面積,。分別在夏季高溫,、高濕、大水分域和冬季低溫,、高粉塵作業(yè)條件下現(xiàn)場在線應(yīng)用,,驗(yàn)證了檢測技術(shù)和裝置的可靠性和實(shí)用性,在線檢測誤差在±0.5%范

    Abstract:

    圍內(nèi),。In paddy drying process, the moisture content measurement is disturbed by the shape, thickness, density and temperature fluctuation of paddy, the ununiformity of interior moisture content distribution and etc. In order to get an accurate moisture content of the test single kernel paddy drying process, a kind of on-line moisture content metering technology and device was developed. Based on multi-channel reelection circuit and analytical calculation, the non-linear problem of moisture content metering in drying process was resolved. The curves of voltage transferred from the resistance of paddy with different moisture contents to the time sequence, were obtained in dynamic process. And from them, it is concluded that the height of wave peak can be the measurement property when moisture content is less than 23.5%, and the curve boundary area can be measurement property when it is more than 23.5%. That is very helpful to promote detection accuracy. The reliability and practicality of the detecting technology and device was validated in different working conditions: the state of high temperature and high humidity in summer, and the state of low temperature, high dust and wide moisture distribution range in winter. The on-line measurement error is less than ±0.5%. 

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李長友.稻谷干燥含水率在線檢測裝置設(shè)計(jì)與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(3):56-59.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(3):56-59.

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