| 摘要 |
A method of checking the structural integrity of a radial tyre 1 comprises heating the surface of the region of the tyre to be examined by applying an external source of continuous low intensity energy having an harmonically modulated intensity, viewing the heated area with a thermal imaging camera 7 to detect emitted thermal infra-red radiation at points across the surface, comparing the emitted thermal radiation with the applied low intensity energy to provide a thermal picture on display unit 9 of the tyre surface and determining discontinuities in the thermal picture obtained such that voids or other defects in the structure are found. <IMAGE> |
