Title:
METHOD FOR MEASURING ROTATIONAL-DIRECTION MAIN GROOVE DEPTH OF TIRE, AND DEVICE FOR MEASURING ROTATIONAL-DIRECTION MAIN GROOVE DEPTH USING METHOD
Document Type and Number:
WIPO Patent Application WO/2024/089917
Kind Code:
A1
Abstract:
[Problem] To provide a device that measures the depth of a rotational-direction main groove (circumferential main groove) of a tire that has been removed from a vehicle, the main groove being formed in the tread surface of the tire. [Solution] Line laser light is projected onto at least two different sites on a tread surface, and respective images of the line laser light are acquired. Light sectioning line coordinates, which are coordinates of the image of the line laser light, are detected with respect to each of the captured images. The depth of a groove formed in the tread surface is calculated on the basis of the triangulation method from the respective light sectioning line coordinates. Grooves, for which the rotational direction coordinates of the calculated groove depth match, are each deemed to be a rotational direction main groove, and the groove depth thereof is determined to be the depth of the respective rotational direction main groove.
Inventors:
TANAKA FUMITOSHI (JP)
KATSUMURA KAZUSHIGE (JP)
KAZAMA MASATOSHI (JP)
KATSUMURA KAZUSHIGE (JP)
KAZAMA MASATOSHI (JP)
Application Number:
PCT/JP2023/016781
Publication Date:
May 02, 2024
Filing Date:
April 27, 2023
Export Citation:
Assignee:
CHUOKAISAN CO LTD (JP)
International Classes:
G01B11/22; G01B11/25
Domestic Patent References:
| WO2020202632A1 | 2020-10-08 |
Foreign References:
| JP2016001165A | 2016-01-07 | |||
| JP2002277409A | 2002-09-25 | |||
| JPH0743325B2 | 1995-05-15 | |||
| JP2018054356A | 2018-04-05 |
Attorney, Agent or Firm:
One ip Patent Firm (JP)
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