G - Physics – 01 – N
Patent
G - Physics
01
N
340/124.4
G01N 21/84 (2006.01) A01C 7/10 (2006.01) G01V 8/20 (2006.01) G06M 1/10 (2006.01) G06M 7/00 (2006.01)
Patent
CA 1242015
ARTICLE OR SEED COUNTER Abstract of the Disclosure 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.
490254
Dharia Vijay M.
Friend Kenneth D.
Borden Ladner Gervais Llp
Deere & Company
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