Arrangement for measuring moisture content

Details Arrangement for measuring moisture content Arrangement for measuring moisture content

1982-12-16

1985-10-08

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 2704

Patent

active

045463115

ABSTRACT:
An arrangement for measuring the moisture content of an aqueous substance by using microwaves produced by a transmitting arrangement formed by a signal source and a transmit aerial connected thereto. A portion of the aqueous substance is disposed in the field of radiation of the transmit aerial, and a receive aerial for receiving the transmitted wave is immersed in the substance. An evaluation arrangement is connected to the receive aerial for measuring a phase change of the wave in the substance. The phase change represents the moisture content of the substance.

REFERENCES:
patent: 2798197 (1957-07-01), Thurston
patent: 4052666 (1977-10-01), Fletcher
Berliner: "Phase Sensitive UHF Moisture Gauge"-Ind. Lab. (USA)-vol. 37, No. 10, Oct. 1971 (translated Zavodskaya Laboratoriya-Oct. 71)-USCL.
Kraszewski: "An Improved MW Method of Moisture Content Measurement and Control", IEEE Transaction on Industrial Electronics & Control Instr.-Nov. 76.

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