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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%. 