Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1981-05-08
1983-09-06
Buczinski, S. C.
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
33288, 356155, G01B 1126, G01B 5255
Patent
active
044026030
ABSTRACT:
Apparatus and method are disclosed by which toe is measured relative to a vehicle centerline or a nonsteerable wheel rolling direction for all four wheels on a vehicle having a pair of front steerable wheels and a pair of rear nonsteerable wheels. An alignment head is placed on one of the front wheels and another alignment head is placed on one of the rear wheels, both wheels being on the same side of the vehicle. The alignment heads project a beam pattern across the vehicle at the front and the rear. Reflectors are mounted on the other wheels at the front and the rear to intercept and reflect the beams back toward detectors included in the alignment heads. A beam pattern is also projected rearwardly along the length of the vehicle chassis from the alignment head mounted on the front wheel. A rear wheel mounted reflector intercepts the rearwardly projected beam pattern and reflects it back toward a detector in the front wheel mounted alignment head. Structure is provided on each of the rear wheels which provides an optical path which may be directed toward points at the front wheels which are equidistant from a center point between the front wheel pair. Measurements of total toe for each wheel pair and of individual toe for each wheel are obtained through use of the disclosed structure and process.
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Buczinski S. C.
FMC Corporation
Megley R.B.
Stanley H. M.
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