Apparatus and method for calibrating vehicle wheel alignment ins

Details Apparatus and method for calibrating vehicle wheel alignment ins Apparatus and method for calibrating vehicle wheel alignment ins

1995-05-24

1997-01-28

Trammell, James P.

Boots, shoes, and leggings

3320318, G01C 2500

Patent

active

055983588

ABSTRACT:
Apparatus and method for calibrating vehicle wheel alignment instruments includes a pan constructed of stamped and formed sheet steel, into which has been welded two cylinders. Bearings are mounted into each end of the cylinders and rotatably carry shafts onto which wheel alignment sensors are mounted during the process of calibration. The pan rests on a pair of bases with stepped cams, such that the pan can be tilted to the left or right a known amount. The pan can be flipped left to right about its longitudinal axis or end to end about its narrow (transverse) axis. A long shaft is provided which can be set into notches in the ends of the pan. A calibration procedure is performed during which the wheel alignment sensors are mounted to the various shafts, the shafts are rotated to two positions 180 degrees apart, and the pan is flipped and tilted, such that the average position occupied by the transducers of the wheel alignment sensors is as if the sensors were perfectly mounted at the four corners of a perfect rectangle. Measurements stored during this procedure are averaged to produce high quality calibration data.

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patent: 5018853 (1991-05-01), Hechel et al.
patent: 5046032 (1991-09-01), Alussick et al.
patent: 5519488 (1996-05-01), Date, Jr. et al.

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