Method and apparatus for the optical measurement of an angle bet

Details Method and apparatus for the optical measurement of an angle bet Method and apparatus for the optical measurement of an angle bet

1991-12-09

1993-05-04

Hellner, Mark

Optics: measuring and testing

Angle measuring or angular axial alignment

With photodetection remote from measured angle

356141, G01B 1126

Patent

active

052086470

ABSTRACT:
In a method and apparatus for the optical measurement of an angle between the positions of components relative to each other, such as the wheels of a motor vehicle, a light beam is directed along a first side of the angle to be measured towards the apex thereof and from there is transmitted at intervals of time which each correspond to a full 360.degree. rotation for a first signal registration step at a first moment in time. A second light beam is directed along the second side of the angle to the apex thereof and from there is transmitted, relative to the respective first moment in time, with a time difference corresponding to the angle between the first and second light beams, for a second signal registration operation, at a second moment in time. The magnitude of the angle is calculated from the interval between the two signal registration operations.

REFERENCES:
patent: 3574466 (1971-04-01), Peters
patent: 3992106 (1976-11-01), Auerbach
patent: 4029415 (1977-06-01), Johnson
patent: 4820041 (1989-04-01), Davidson et al.
patent: 4874238 (1989-10-01), Ochi et al.
patent: 4889997 (1989-12-01), Tomiolo

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