Moisture analyzer

Details Moisture analyzer Moisture analyzer

1983-11-15

1985-12-24

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

G01R 2726

Patent

active

045609233

ABSTRACT:
A moisture analyzing system including an antenna coupled to a frequency-modulated voltage source and arranged to apply an alternating electric field to a material being tested for moisture content. An LC tank circuit is connected in parallel with the antenna and a resistance is connected between the source and the parallel combination of the antenna and the tank circuit. Detecting the level of resonant voltage peak output signals produced across the tank circuit is a measurement circuit which provides therewith a sensing signal indicative of the moisture content of the material being tested. The detection of resonant peak amplitudes produced by frequency sweeping a tank circuit eliminates many unstable variables that interfere with moisture measurements.

REFERENCES:
patent: 3443219 (1969-05-01), Adams
patent: 3723865 (1973-03-01), Batey et al.
patent: 4468610 (1984-09-01), Hanson

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