High speed bulk grain moisture measurement apparatus

Details High speed bulk grain moisture measurement apparatus High speed bulk grain moisture measurement apparatus

1980-01-30

1982-04-20

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2704

Patent

active

043261639

ABSTRACT:
Apparatus for high speed continuous monitoring of the moisture content of grain and the like is disclosed. The apparatus includes a transmitter that transmits signals having two separate frequencies through the grain that is being monitored. A receiver having an antenna placed opposite the antenna of the transmitter picks up the transmitted signals after they pass through the grain. The output of the receiver is coupled to a frequency separator which separates the signals. The two single frequency signals from the frequency separator are applied to separate inputs of a differential detector. The output, if any, from the differential detector is a measure of the moisture content of the grain.

REFERENCES:
patent: 3155898 (1964-11-01), Chope
patent: 3249865 (1966-05-01), Hanken
patent: 3255411 (1966-06-01), Norwich
patent: 3265967 (1966-08-01), Heald

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