| 摘要 |
This is a new tyre testing process. Examination takes place before and after alteration in tyre pressure. Using coherent radiation, an interferogram of the tyre surface is produced. This is converted into a moduluo-2 image, which is then processed to a grey-scale picture. By comparison with this image, existing tyre defect information is derived. The tyre, on the vehicle, is driven onto a set of live rollers. A test head is advanced to a set distance from the tyre, to register the interferogram. A first segment is scanned for defects. The tyre is turned through a further segment by the rollers. Segments are scanned until the entire surface has been examined. Also claimed is a tyre testing unit for the purpose described. |
