Inspection Method And Apparatus For Uneven Marks On Tire
First Claim
1. A method for inspecting three-dimensional forms of one or more marks formed with unevenness on a surface of a tire, which comprises a step of measuring heights of unevenness inclusive of these marks on each area element in a predetermined tire surface region to acquire data of unevenness distribution, a step of specifying a tire surface portion corresponding to a mark model for the respective mark in the tire surface region from data of three-dimensional form of a previously prepared mark model as a mark template and the acquired data of the unevenness distribution, a step of determining a coincidence between the data of the unevenness distribution and the data of the three-dimensional form of the mark model in the specified tire surface portion on the respective mark to judge an acceptance of the three-dimensional form of the respective mark based on the coincidence.
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Accused Products
Abstract
There are provided an inspection method of tire uneven marks capable of judging defect of three-dimensional form of the mark in a higher reliability without depending on a brightness distribution image of unevenness, and an inspection apparatus of tire uneven marks. The inspection method of tire uneven marks comprises a step of measuring heights of unevenness inclusive of marks to be inspected with respect to each area element in a predetermined tire surface region to acquire unevenness distribution data, a step of specifying a tire surface portion corresponding to a mark model in the tire surface region from data of three-dimensional form of a mark model previously prepared as a template of the each mark and the above acquired unevenness distribution data, and a step of determining a coincidence between the unevenness distribution data of the specified tire surface portion with respect to the each mark and data of three-dimensional form of the mark model to judge an acceptance of the three-dimensional form of the mark based on the coincidence.
32 Citations
8 Claims
- 1. A method for inspecting three-dimensional forms of one or more marks formed with unevenness on a surface of a tire, which comprises a step of measuring heights of unevenness inclusive of these marks on each area element in a predetermined tire surface region to acquire data of unevenness distribution, a step of specifying a tire surface portion corresponding to a mark model for the respective mark in the tire surface region from data of three-dimensional form of a previously prepared mark model as a mark template and the acquired data of the unevenness distribution, a step of determining a coincidence between the data of the unevenness distribution and the data of the three-dimensional form of the mark model in the specified tire surface portion on the respective mark to judge an acceptance of the three-dimensional form of the respective mark based on the coincidence.
Specification