A subsection method to evaluate width of irregular crack

WANG Zhong-yu; LI Meng; GE Le-yi

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A subsection method to evaluate width of irregular crack

更新时间：2026-07-07

- A subsection method to evaluate width of irregular crack
- Vol. 23, Issue 3, (2008)
- 作者机构：
  
  北京航空航天大学仪器科学与光电工程学院精密光机电一体化技术教育部重点实验室,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2008
- 稿件说明：
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WANG Zhong-yu, LI Meng, GE Le-yi. A subsection method to evaluate width of irregular crack[J]. 2008, 23(3).
DOI：

WANG Zhong-yu, LI Meng, GE Le-yi. A subsection method to evaluate width of irregular crack[J]. 2008, 23(3). DOI：

摘要

针对表面裂纹边缘轮廓的不规则特性

提出了一种分段宽度评定方法.利用计算机数字图像处理的方法

在获得表面图像后

对该图像沿纵向进行分段

分别对每段的裂纹宽度用Ferret算法进行评定.为了比较不同的分段方法的优劣

提出有用信息利用率的概念

从几种分段方法中选出一种最优的方法进行分段评定

最后得出该裂纹宽度的定量评定.经过实例验证

用此方法可以定量评定裂纹的宽度

评定的结果可以为机械结构表面检测提供有效依据

该方法也可应用于一般不规则图形几何尺寸的定量评定.

Abstract

In consideration of the irregular outline of surface crack

a subsection method for width evaluation was proposed.Based on digital image processing

the surface image was acquired and then was divided into several lengthways subsections

the width of each of which was respectively evaluated by Ferret algorithm.For comparative evaluation of diverse sectioning methods

a conception of useful information ratio was put forward for choosing among them an optimal method

by which the quantitative evaluation of crack width was obtained.Experimental data indicate that by using the method proposed in this paper

the width of surface crack can be quantitatively evaluated.The result can provide effective criterion for mechanism surface inspection

and moreover

this method can also be employed in quantitative evaluation for geometric dimensions of irregular graphics.

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