Tyre shape detecting device and tyre shape detecting method

Abstract

The invention discloses a tyre shape detecting device, which can acquire a clear picture of linear light irradiated on the surface of a tyre by picking up the picture of the linear light with quite high pickup speed under the condition of not enhancing the intensity of the linear light during shape detection of a light-section method based on an image of the picture of the linear light irradiated on the surface of the tyre. The device is provided with a light projection device (10) and a camera (20), wherein in order to form light-section lines on a single beam line Ls on the surface of the tyre (1), the light projection device (10) connects a plurality of linear light rays into a row for irradiation in the direction different from the detection height direction (Z-axis direction) of the light-section lines, or condenses the light in the length direction of the linear light to irradiate one linear light ray; and the camera (20) picks up the image of the linear light connected into one row in a single beam line shape to be irradiated to the surface of the tyre (1) in the normal reflection direction of respective main rays of a plurality of sheet light rays relative to the surface of the tyre (1) or in the normal reflection direction of a main ray of one condensed linear light ray relative to the surface of the tyre (1).

Description

Technical field [0001] The present invention relates to a tire shape detection device and a tire shape detection method for detecting the surface shape of the tire by capturing an image of linear light irradiated on the surface of a relatively rotating tire and performing shape detection by a photo-cutting method based on the captured image. Background technique [0002] The tire has a structure made of laminated rubber, chemical fiber, steel wire and other materials. If there is an uneven part in the laminated structure, the part with relatively weak pressure resistance during inflation will be called bulge. The bulge (convex), or the depression (recess) called pit or low pressure area. Tires with such shape defects such as pits or low-pressure areas need to be removed from the delivery object through inspection due to safety issues or poor appearance. [0003] Conventionally, in the inspection of tire shape defects, a contact or non-contact point measuring sensor detects the sur...

AI Technical Summary

Problems solved by technology

However, if imaging is performed at a high imaging rate of 4,000 frames per second, a clear image of linear light cannot be obtained according to the technique disclosed in Patent Document 1.

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