Automatic measurement system of tire tread length based on image processing

YANG Kai; CHEN Xiang-guang; JIN Huai-ping

doi:10.3788/OPE.20152313.0497

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Automatic measurement system of tire tread length based on image processing

更新时间：2020-08-13

- Automatic measurement system of tire tread length based on image processing
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 497-503(2015)
- 作者机构：
  
  北京理工大学化工与环境学院北京,100081
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0497
  CLC： TH821.3;TP391.4
- Received：20 March 2015，
  
  Revised：07 April 2015，
  
  Published：14 November 2015
- 稿件说明：
移动端阅览
杨凯, 陈祥光, 金怀平. 基于图像处理的轮胎胎面自动测长系统[J]. 光学精密工程, 2015,23(10z): 497-503

YANG Kai, CHEN Xiang-guang, JIN Huai-ping. Automatic measurement system of tire tread length based on image processing[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 497-503
杨凯, 陈祥光, 金怀平. 基于图像处理的轮胎胎面自动测长系统[J]. 光学精密工程, 2015,23(10z): 497-503 DOI： 10.3788/OPE.20152313.0497.

YANG Kai, CHEN Xiang-guang, JIN Huai-ping. Automatic measurement system of tire tread length based on image processing[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 497-503 DOI： 10.3788/OPE.20152313.0497.

摘要

为了实现对轮胎胎面长度的在线自动测量

研究了生产过程中采用的图像处理及测量算法

建立了基于图像处理的轮胎胎面测长系统。为了避免现场光源的影响

分别采用了中值滤波、灰度拉伸等方法对图像进行预处理

并采用大津(OSTU)算法对图像进行二值化处理。采用线性拟合的算法对像平面的轮胎边缘进行拟合

建立像平面的轮胎边缘直线方程。针对现场标定给安装带不便

系统预制了多个基准样本点

采用多元线性回归的方法确定坐标变换参数。通过已确定的坐标变换得出物理坐标系中胎面首尾边缘直线的方程

进而计算出胎面的长度。实验结果表明

对于多种规格的胎面进行多次测量

其测量系统的精度 2 mm

3值在1.1 mm以内。该测量系统能够满足生产工艺的测量要求

可实现胎面长度的在线自动测量

并具有安装测试方便、运行稳定等特点。

Abstract

To measure the tire tread length on-line automatically

a length measurement system was established for the tire tread

and image processing and measuring algorithms used in productive process were investigated. For the purpose of removing the influence of light in a real field

several methods such as median filtering

gray stretching

etc

were used to preprocess the image

and the OSTU algorithm was used to accomplish the image binary process. The edge of the tire tread is straight line

so linear fitting algorithm was used to fit the linear equation in the image plane. To avoid the inconvenience in installation caused by calibration on the site

a couple of measurement reference points were reserved. The coordinate transformation parameters were obtained using the multiple linear regression method. The line equation of the tread head and the tread tail in the physical coordinate system were determined by the coordinate transformation. Therefore

the length of tire tread could be calculated. Experimental results indicate that the precision of the measuring system proposed in this paper is less than or equal to 2 mm for multiple measurement of various tire treads

and the 3 value is less than 1.1 mm. Although the tire tread is elastomeric

the measuring system can satisfy the production requirement. The system is characterized by convenient installation and testing

system stable operation

etc

关键词

Keywords

references

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