High rate seed sensor

Details High rate seed sensor High rate seed sensor

G - Physics

01

N

340/124.1

G01N 21/85 (2006.01) A01C 7/10 (2006.01) G06M 1/10 (2006.01) H03K 5/1534 (2006.01)

Patent

CA 1243373

Abstract A circuit is provided for a seed sensor which includes a light source and a light responsive element respectively positioned along a path of travel of seeds for producing a momentary change in signal level from the light responsive element in response to a momentary change of level of light incident thereupon from the light source due to the passage of one or more seeds therebetween. In accordance with the invention the circuit comprises a pulse-producing circuit responsive to the change in signal level from the light responsive element for producing a discrete pulse signal in response to each change in the direction of the change in signal level. Predetermined ones of the discrete pulse signals are selected for counting.

489909

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