Study of the moisture content of soybeans based on dielectric property of soybean
Yidan Bao · Journal of Zhejiang University Agriculture and Life Sciences · 2005
A method of measuring the moisture content of soybean making use of its dielectric properties was introduced, and the necessary equipment was developed, which was composed of signal generator, pressure transducer, cylindric measuring capacitance, electronic tube millivoltmeter, oscilloscope, etc. The relationship between dielectric properties and moisture content of soybean under conditions of different stimulant signal frequencies was investigated. The results showed that at 1 kHz, the relationship curve of the moisture content and equivalent capacitance value of soybean was the most desirable. By way of regression, a power-exponent function was established. Pairing comparison experiment indicated that the precision of this method was satisfactory.