Tyre laser speckle non-destructive testing instrument, basing on laser shearing speckle interferometry, is used to inspect the phase change in front of the beam wave and relevant strips of interferometric speckle field after laser irradiation.In particular to the inspection of tyre product line or offline swelling inspection, the instrument adopts precise phase shift technique for measuring the deformation displacement derivative of the tyre surface, and the inspection result is not affected by the rigid motion of tyre.
The laser beam expander of the testing instrument irradiates the tyre at a fan angle, after pressurizing and loading, the image of the speckle stripe is acquired for comparing, so as to judge the swelling of tyre.
