Grain loss monitor

Details Grain loss monitor Grain loss monitor

G - Physics

01

F

73/164, 130/19,

G01F 1/20 (2006.01) A01D 75/00 (2006.01) G01F 1/86 (2006.01)

Patent

CA 1080843

ABSTRACT OF THE INVENTION A percentage of the grain lost is sampled constantly by sensors at locations across the rear of the sieve of a com- bine and the sound of the grain kernels striking the sensors is picked up by a microphone, amplified, filtered and fed to a ratio computing device which calculates the total grain loss from the sampling and displays same on a meter. A further sensor samples grain passing through the rear portion of a straw walker of a combine as this bears a direct relation- ship to the quantity of grain passing over the end of the walker. It can therefore be used to calculate the grain loss over the end of the walker. Once again the sound of the grain kernels striking the sensor is picked up by a microphone, amplified, filtered and fed to a ratio computing device which calculates the grain loss over the end of the walker and displays same on the meter. A switching device enables the total of the grain losses to be calculated from the two sensors by means of a summation device to which both sensor signals are connected. This switching device also enables the operator to weed out the grain loss over the sieve or the grain loss over the walker thus enabling him to determine where adjustments are required.

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