| 摘要 |
PURPOSE:To obtain a method and device for measuring of moisture which permits the temp. compensation of the true moisture content by sample temp. and produces less errors for grains of high temps. during drying with heat power by measuring the electric resistances of an object to be measured at the time t1 and t2 after a specified time from the point when said object is sandwiched, obtaining moisture signals without temp. compensation, and operating the difference between the temp. in the stage of loading the object into an electrode part and the temp. in the electrode part. CONSTITUTION:A transfer switch 8A is closed at the time t1 after the time DELTAt upon starting of a timer, and the signal from an electrode part 1 is subjected to processing such as linearization and is made to an input to an A/D converting part 5, by which A/D conversion is started. The converted digital signal thereof is read with a processor 6 and data D1 is obtained. Further at the time t2, the signal from the electrode is read and D2 is obtained. Signals M1, M2 without temp. correction are obtained directly from the data D1, D2 or by operating the same. The electrode temp. signal from a detecting part 3 is inputted to the part 5, the output whereof is read with the processor 6, whereby electrode temp. data To is obtained. The processor 6 operates the equation T2=To+K(M1-M2) by using the data M1, M2, To and a constant K. The moisture M corrected of temp. is calculated from the operating equation M=M2-alpha(T2- 20) by using the sample temp. T2, the signal M2 and the coefft. of temp. correction (0.1%/1 deg.C). alpha is a constant. |
