초록 ▼

A wheel alignment system uses head units attached to each of the four wheels. The front head units contain photodetector arrays which view across the front of the vehicle and to the rear. The rear units carry photodetector arrays which look forward. Each photodetector array views a target on one of

A wheel alignment system uses head units attached to each of the four wheels. The front head units contain photodetector arrays which view across the front of the vehicle and to the rear. The rear units carry photodetector arrays which look forward. Each photodetector array views a target on one of the other head units. A microcomputer in each head unit determines an angular value based upon the position of the target image on the photodetector array. The angle values determined by the microcomputers of the individual head units are supplied to a master computer in a main console which determines individual toe angles with respect to a tread centerline for either the front two wheels or for all four wheels. The master computer controls a display at the main console, as well as a remote display to guide the mechanic in making alignment adjustments.

대표청구항 ▼

A system for measuring an angular relationship of a wheel of a vehicle, the apparatus comprising: a head unit; positioning means for positioning the head unit in a predetermined relationship to a vehicle wheel; a target for providing a target image; means for mounting the target in a predetermined r

A system for measuring an angular relationship of a wheel of a vehicle, the apparatus comprising: a head unit; positioning means for positioning the head unit in a predetermined relationship to a vehicle wheel; a target for providing a target image; means for mounting the target in a predetermined relationship to another wheel of the vehicle; image sensor means carried by the head unit for producing pixel signals representative of picture elements of a two-dimensional field of view of the image sensor means, the image sensor means being carried by the head unit and positioned so that a position of the target image of the target within the field of view of the image sensor means is dependent upon angular position of the wheel to which the head unit is mounted; and means for deriving an angular relationship of the wheel based upon the pixel signals.