Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1992-08-04
1993-12-07
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
3320312, 3320315, 3320318, 33288, 33DIG21, 356152, G01C 308, G01B 1126, G01B 524
Patent
active
052687317
ABSTRACT:
The present invention relates to a wheel alignment measuring apparatus which measures the toe-in length or angle and camber angle of each tire (17) of a car.
The wheel alignment measuring apparatus can be used to measure the distances to various points on the surface of the tire (17) by means of the light of a predetermined wavelength emitted from the light-emitting means (4) and to determine the toe-in angle or length and camber angle of the tire (17) based on the measured distances. In other words, such measurement can be done without any contact with the tire (17) under inspection, thus it is possible to prevent any trouble which would occur when such measurement is done in contact with the tire, such as error caused by the oscillation or the like of the tire (17).
Also, with the wheel alignment measuring apparatus according to the present invention, it is possible to effectively correct any error of measurement caused by any irregularities on the tire (17), thereby attaining a higher accuracy of measurement since the calculating means (6) incorporated appropriately calculates the distances to various points on the tire surface from the data obtained based on the time taken for the light emitted toward various points on the entire circumference of each tire (17) at many short time intervals to return, as reflected, to the light-emitting means (photo-detecting means).
REFERENCES:
patent: 4863266 (1989-09-01), Masuko et al.
patent: 4899218 (1990-02-01), Waldecker et al.
patent: 5111585 (1992-05-01), Kawashima et al.
Fuchiwaki Motoaki
Kaya Toshiyuki
Buczinski Stephen C.
Chuo Electronic Measurement Co., Ltd.
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