| 摘要 |
FOR MEASURING THE TREAD DEPTH OF THE TYRE OF A MOTOR VEHICLE BY MEANS OF A MEASURING HEAD CONTAINING A LASER (67), THE LASER MEASURING HEAD IS POSITIONED RELATIVE TO THE TYRE OF THE MOTOR VEHICLE IN SUCH A WAY, THAT A REFERENCE SURFACE OR PLANE ADOPTS A WELL-DEFINED POSITION WITH RESPECT TO THE TYRE. THE LASER BEAM (66) OF THE LASER (67) IS DIRECTED THROUGH THE REFERENCE SURFACE (68) AT AN ANGLE (ALPHA) TO THE BOTTOM (64) OF THE TYRE TREAD, WHEREBY A LIGHT SPOT (78) IS GENERATED ON THIS BOTTOM (64) OF THE TYRE TREAD. THE POSITION (E) OF THE LIGHT SPOT (78) IS OBSERVED BY AN IMAGE RESOLVING SENSOR (82). THEREFROM, A MEASURE (T) OF THE DEPTH OF THE TYRE TREAD IS GAINED. (FIG. 5)
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