Patent ID: 9638606
Date: 2017-05-02
CPC Classifications: G01B,G01M

Claim:
1. A tire shape inspection method that inspects a shape of a tread face formed of protruding blocks having contact faces formed at top portions of the protruding blocks and recessed grooves arranged between the protruding blocks by detecting height data of the tread face, the method comprising: a contact face acquisition step of acquiring height changes of the contact faces by removing height data outside of a prescribed height range from the detected height data of the tread face, the prescribed height range including an average value of the detected height data; a height change interpolation step of interpolating the section of the height data removed in the contact face acquisition step by using heights in the prescribed height range in the height changes of the contact faces acquired in the contact face acquisition step, and acquiring the interpolated height changes of the contact faces; and a runout value acquisition step of acquiring, as a runout value indicating the shape of the tread face, the difference between the maximum value and the minimum value in the interpolated height changes of the contact faces.