Fixture for use in microwave grain moisture measurement

Details Fixture for use in microwave grain moisture measurement Fixture for use in microwave grain moisture measurement

1996-05-10

1998-02-03

Brown, Glenn W.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

73 73, G01N 2204

Patent

active

057148872

ABSTRACT:
A fixture for use in the microwave measurement of the moisture content of grain comprises a hollow support member, an antenna support assembly supporting antennas for transmitting and receiving microwaves, and a sample scoop. The support member, antenna support assembly and scoop are made of a low dielectric plastic material which has negligible effect on the microwaves. The antenna support assembly includes a cylindrical sleeve with two support stubs extending radially outwardly from the sleeve. The support member has two recesses in its top surface for receiving the stubs so as to position the antenna support assembly and the antennas relative to the support member. The sleeve has an inside diameter slightly greater than the outside diameter of the scoop so that the scoop may be inserted into the sleeve and rest on the same supporting surface as the support member. The arrangement is such that when the scoop is loaded with a sample of grain and inserted through the sleeve, the center of the grain sample is substantially aligned with the antennas.

REFERENCES:
patent: 3360721 (1967-12-01), Pullman
patent: 4066951 (1978-01-01), Wang
patent: 4716360 (1987-12-01), Pakulis

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