Grain monitor

Details Grain monitor Grain monitor

1997-08-26

1999-02-16

Melius, Terry Lee

Crop threshing or separating

Means responsive to a sensed condition

Moisture

56 102B, 56DIG15, A01F 1200

Patent

active

058713972

ABSTRACT:
A microwave grain monitor determines grain density and moisture content without measuring the phase shift of the measurement signal in passing through the grain. A set of grain coefficients is determined and stored in a non-volatile memory. A microwave measurement signal is transmitted through the grain and the ambient temperature is sensed. The grain density and moisture content are determined from the attenuation of the measurement signal in passing through the grain, the sensed temperature and the set of grain coefficients.

REFERENCES:
patent: 5092819 (1992-03-01), Schroeder et al.
patent: 5106339 (1992-04-01), Braun et al.
patent: 5480354 (1996-01-01), Sadjadi
patent: 5685772 (1997-11-01), Andersen et al.
patent: 5716272 (1998-02-01), Nelson
Microwave Monitoring Moisture Content in Grain-Further Considerations; International Microwave Power Institute, 1988; vol. 23 No. 4, 1988; pp. 236-246.
Use of a Density-Independent Function and Microwave Measurement System for Grain Moisture Measurement; 1988 Am. Society of Agricultural Eng.; vol. 31(6); Nov.-Dec., 1988.
Microwave Moisture Measurement of Grains; IEEE Transactions on Instrumentation and Measurement, vol. 41, No. 1, Feb. 1992; pp. 111-115.
Density-Independent Microwave Measurement of Moisture Content in Static and Flowing Grain; 1993 Am. Society of Agricultural Engineers, vol. 36(3) May-Jun.; pp. 827-835.
Microwave Sensors for Process Control Part I: Transmission Sensors; Ray J. King, KDC Technology Corp.; Sensors, Sep. 1992; pp. 68-74.

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