Grading implement elevation controller with tracking station and reference laser beam
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United States of America Patent
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Jun 30, 1998
Grant Date -
N/A
app pub date -
Jun 5, 1996
filing date -
Jun 5, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control system is disclosed that controls the position of a grading implement of a construction machine according to a site plan. The control system has three basic components: a stationary tracking station, a computer connected to the tracking station, and an implement controller attached to the construction machine. The tracking station measures a distance and an azimuth (horizontal) angle to a remote target located on the construction machine and communicates that position information to the computer. The computer consults a stored site plan to determine what elevation is desired at that position and calculates a corresponding zenith (vertical) angle, and communicates the desired zenith angle to the tracking station. The tracking station in turn positions a zenith-reference laser beam at the desired zenith angle. The implement controller senses the zenith-reference laser beam and adjusts the grading implement relative to the zenith-reference laser beam until its desired position is obtained.
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Cited Art Landscape
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