| 摘要 |
<p>A vehicle wheel alignment measurement system comprises four infra red emitter-detector units (11) fixed by clamps (15) to the vehicle wheels. Each unit (11) comprises a beacon (18) and a rotatable detector (20) coaxial with the beacon (18) and driven by controlled motor means (21,22). Angular rotation of the detector (20) is sensed (23,24) and signals from the four units (11) are analysed by a signal processing computer (26) to give absolute position and relative angular measurements of the four wheels. <IMAGE></p> |
