Article or seed counter

Boots – shoes – and leggings

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Details

364564, 250221, 2502221, 2502222, 377 6, G01N 2100, G01N 2185, G01V 904

Patent

active

046352155

ABSTRACT:
A sensor for counting articles, such as seeds, moving through a conduit includes an array of infrared LEDs generating a uniform diffuse beam of radiation which entirely illuminates a cross sectional volume of the conduit. The beam is detected by a planar photo diode which extends across the opposite side of the conduit. A pair of mirrors extend along opposite sides of the conduit between the array and the photo diodes. Slits narrow the beam and limit the amount of radiation which can impinge upon the photo diode. The signal from the photo diode is integrated by a signal processing unit so that the sensor can count a plurality of seeds in a group of seeds which simultaneously pass through the beam. The signal processing unit automatically compensates for changes in the steady state photo-diode output and for changes in seed size.

REFERENCES:
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patent: 3900718 (1975-08-01), Seward
patent: 3927400 (1975-12-01), Knepler
patent: 3965340 (1976-06-01), Renner et al.
patent: 4021117 (1977-05-01), Gohde et al.
patent: 4225930 (1980-09-01), Steffen
patent: 4333096 (1982-06-01), Jenkins et al.
patent: 4491241 (1985-01-01), Knepler et al.
patent: 4528680 (1985-07-01), Archambeault
patent: 4555624 (1985-11-01), Steffen

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