Method for detecting sensor or target slip during vehicle alignment measurement

摘要

A method and apparatus for detecting, for wheel assemblies on opposite ends of an axle during an alignment angle measurement or inspection process, relative movement or slip between the alignment angle sensor or optical target and the wheel assembly upon which it is mounted. Changes in measurements of invariant characteristics of the solid axle or an associated wheel assembly are observed by an alignment measurement or inspection system as indications of movement or slip between at least one of the alignment angle sensors or optical targets and the associated wheel assembly. Upon detection of a change a measurement of an invariant characteristic, an operator is alerted by the alignment measurement or inspection system to the presence of movement or slip of one or both of the alignment angle sensors or optical targets associated with the wheel assemblies of the axle.

主权项

1. A method for detecting relative movement between alignment angle sensors or optical targets and the vehicle wheel assemblies on opposite ends of an axle on which the respective alignment angle sensors or optical targets are mounted, comprising:
monitoring with the alignment angle sensors or optical targets, at least one measurement of an invariant characteristic associated with the axle and wheel assemblies; responsive to a detected change in said at least one measurement, generating an indication of detected relative movement between at least one of said alignment angle sensors or optical targets and said associated vehicle wheel assemblies.