Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Calibration
Patent
1992-04-27
1993-10-26
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Calibration
324643, G01R 2704
Patent
active
052569780
ABSTRACT:
A device and method for measuring the moisture content of a sample using microwaves is provided. The device includes a power supply for outputting an electrical current, a microwave oscillator electrically connected to the power supply for outputting a microwave signal, and a waveguide placed between the microwave oscillator and the sample. The waveguide has a predetermined length and is constructed from copper. A microwave detector outputs a voltage signal which is related to the intensity of the microwave energy reflected by moisture in the sample. A voltmeter displays a reading of the voltage signal output by the microwave detector. The length of the waveguide is selected to maximize the voltage reading of the voltmeter for a given sample. An enclosure houses the power supply, the microwave oscillator, the waveguide and the microwave detector, and is provided with an opening at which the waveguide is mounted. A sheet of microwave transmissive material covers the opening.
REFERENCES:
patent: 3644826 (1972-02-01), Cormetet, Jr.
patent: 4013950 (1977-03-01), Falls
patent: 4156843 (1979-05-01), Strandberg, Jr. et al.
patent: 4361801 (1982-11-01), Meyer et al.
patent: 4364008 (1982-12-01), Jacques
patent: 4399403 (1983-08-01), Stranberg
patent: 4485284 (1984-11-01), Pakulis
patent: 4727311 (1988-02-01), Walker
patent: 5001433 (1991-03-01), Osaki
Rzepecka, et al., "Monitoring of Concrete Curing Process by Microwave Terminal Measurements", IEEE Trans. on Indust. Elect. and Control Instru., vol. 19, No. 4, Nov., 1972.
Solis Jose M.
Wieder Kenneth A.
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