Tire damage detection system and tire damage detection program

Patent metadata

Field	Value
Publication number	US-11331964-B2
Application number	US-201917057951-A
Country	US
Kind code	B2
Filing date	Apr 24, 2019
Priority date	May 25, 2018
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

A tire damage detection system ( 10 ) is provided with an image data acquisition unit ( 120 ) which acquires image data including a rim wheel and a tire side part of a tire assembled to the rim wheel, a rim information acquisition unit ( 130 ) which acquires rim information including a radial size of the rim wheel associated with the tire, an damage detection unit ( 140 ) which detects an damage portion of the tire side part on the basis of the image data and detects a size of the damage portion with reference to a diameter of the rim wheel based on the rim information, and an output unit ( 150 ) which outputs information on the damage portion detected by the damage detection unit ( 140 ).

First claim

The invention claimed is:

1. A tire damage detection system, comprising:
an image data acquisition unit for acquiring image data including a rim wheel and a tire side part of a tire assembled to the rim wheel;
a rim information acquisition unit for acquiring rim information including a radial size of the rim wheel associated with the tire;
a damage detection unit for detecting a damage portion of the tire side part based on the image data, and for detecting a size of the damage portion with reference to a diameter of the rim wheel based on the rim information; and
an output unit for outputting information on the damage portion detected by the damage detection unit.

2. The tire damage detection system according to claim 1 , wherein the damage detection unit detects a crack in the tire side part as the damage portion on a basis of whether or not a damage candidate included in the image data is in a region darker than a periphery and in a shape more elongated than a predetermined shape.

3. The tire damage detection system according to claim 2 , wherein the damage detection unit detects a width of the crack located within a predetermined range from a grounding portion where the tire is grounded to a road surface.

4. The tire damage detection system according to claim 3 , wherein the output unit outputs a position, length and the width of the crack.

5. The tire damage detection system according to claim 4 , wherein the rim information acquisition unit acquires the rim information including a radial size of a rim flange portion of the rim wheel, and the damage detection unit detects the size of the damage portion based on the diameter of the rim wheel including the rim flange portion.

6. The tire damage detection system according to claim 2 , wherein the rim information acquisition unit acquires the rim information including a radial size of a rim flange portion of the rim wheel, and the damage detection unit detects the size of the damage portion based on the diameter of the rim wheel including the rim flange portion.

7. The tire damage detection system according to claim 3 , wherein the rim information acquisition unit acquires the rim information including a radial size of a rim flange portion of the rim wheel, and the damage detection unit detects the size of the damage portion based on the diameter of the rim wheel including the rim flange portion.

8. The tire damage detection system according to claim 1 , wherein the rim information acquisition unit acquires the rim information including a radial size of a rim flange portion of the rim wheel, and the damage detection unit detects the size of the damage portion based on the diameter of the rim wheel including the rim flange portion.

9. A tire damage detection program for causing a computer to execute:
an image data acquisition processing for acquiring image data including a rim wheel and a tire side part of a tire assembled to the rim wheel;
a rim information acquiring process for acquiring rim information of the rim wheel associated with the tire;
a damage detection process for detecting a damage portion of the tire side part based on the image data, and for detecting a size of the damage portion with reference to a diameter of the rim wheel based on the rim information; and
an output processing for outputting information on the damage portion detected by the damage detection processing.

Assignees

• Bridgestone Corp

Inventors

• Mori Teppei

Classifications

• G06T7/0004

  Industrial image inspection · CPC title

• G06T2207/30108

  Industrial image inspection · CPC title

• B60C13/00 Primary

  Tyre sidewalls; Protecting, decorating, marking, or the like, thereof (B60C17/08 takes precedence; tyre shoulders B60C11/01; removable tyre sidewall trim rings B60B7/01) · CPC title

• B60C2200/065

  for construction vehicles · CPC title

• G01B11/30

  for measuring roughness or irregularity of surfaces · CPC title