Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1986-11-12
1989-04-11
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
33293, 33294, 33296, 172 45, 180168, 342 53, 342 54, 356141, 356152, 356399, 364456, 36442407, G01C 320, G01C 1506, G01B 1126, E02F 376
Patent
active
048200417
ABSTRACT:
A position sensing apparatus and method useful for surveying, marking, and grading implement sensing and control is disclosed. The position sensing apparatus includes two laser reference stations, each of which projects a laser beam that periodically sweeps in a plane across the area to be surveyed. Each time a laser beam strikes the opposite reference station, a radio timing signal is broadcast by that reference station. The position sensing apparatus also includes a portable sensing station that comprises a laser beam receiver, a radio reciever, and a programmed computer. The planar position of the portable sensing station relative to the reference stations is computed by a triangulation technique based on the relative timing of detection of the laser beams by the laser beam receiver and the reception of the radio timing signals by the radio receiver. Elevation is determined according to the height at which one of the laser beams strikes the laser beam receiver.
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Davidson Richard W.
Fletcher John W.
Agtek Development Co., Inc.
Buczinski Stephen C.
Wallace Linda J.
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