Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1996-03-04
1998-11-17
Allen, Stephane B.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250226, 250 221, 250224, 47 17, G01J 104, G01J 142, G01J 508, G01J 350
Patent
active
058379975
ABSTRACT:
An optical proximity sensor generates information indicative of a distance to an object in a field and in some embodiments also generates information indicative of a spectral reflectance characteristic of the object. The information indicative of the spectral reflectance characteristic can be used to determine whether the object in the field is a living plant or another object such as soil. Light emitted from the optical sensor for reflection off the object is modulated so that reflected light from the optical sensor can be discriminated from reflected ambient sunlight. The optical sensor is scanned over the field to map objects in the field and/or to determine the location of rows of crop plants. A sensor in accordance with the present invention has many uses in agriculture including spraying, cultivation and vehicle guidance.
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Beck James L.
Kinter Malcolm L.
Allen Stephane B.
Patchen, Inc.
Wallace T. Lester
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