Position detection system for use with agricultural and construc

Details Position detection system for use with agricultural and construc Position detection system for use with agricultural and construc

1988-03-21

1990-06-26

Rosenberger, Richard A.

Optics: measuring and testing

By polarized light examination

With light attenuation

356 4, 356152, G01B 1100

Patent

active

049366785

ABSTRACT:
An apparatus for detecting the relative position of a remote object, such as a vehicle, upon a construction or agricultural site in cartesian, polar or other coordinates. A laser light beam is scanned in a circular path from a selected reference point at the site through a generally horizontal plane above the site. A pair of photo detectors which are spaced a selected distance are mounted to the remote object in the plane of the scanning beam. The beam is scanned at a constant velocity and the time of its alignment along a reference radial, and its interception with each of the two spaced photo detectors is detected and used to compute the position of the remote object.

REFERENCES:
patent: 4268167 (1981-05-01), Alderman
patent: 4277170 (1981-07-01), Miles
patent: 4818107 (1989-04-01), Ono et al.
patent: 4820041 (1989-04-01), Davidson et al.

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