Non-contact sensor, system and method with particular...

Details Non-contact sensor, system and method with particular... Non-contact sensor, system and method with particular...

G - Physics

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G01B 11/14 (2006.01) G01B 11/24 (2006.01) G01C 3/00 (2006.01) G01C 5/00 (2006.01) G01C 7/04 (2006.01)

Patent

CA 1181944

Abstract of the Disclosure Electro-optical apparatus, system and method for measuring distance to a relatively moving surface, such as distance to a road surface from a vehicle frame of reference passing thereover. The apparatus includes a light transmitter for projecting a rec- tangular beam vertically downwardly onto the road surface. A rotating scanner includes a circumferential array of facets for sequentially receiving the image diffusely reflected from the road surface and reflecting such image through a rectangular reticle onto a photo- detector. Reference beams are sequentially reflected by the road image-reflecting scanner facets onto a reference detector. Distance to the road surface is then determined as a function of the angle of incidence of the road image onto the scanner by comparing the time of incidence of the road image to the times of occurrence of the reference reflections on the reference detector.

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