Fatigue Crack Length Real Time Measurement Method Based on Camera Automatically Tracking and Positioning

被引：9

作者：

Gao, Hongli ^{[1
]}

Shen, Shanshan ^{[1
]}

Yun, Yan ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Key Lab E&M, Minist Educ, Hangzhou 310014, Zhejiang, Peoples R China

来源：

MECHANICAL AND ELECTRONICS ENGINEERING III, PTS 1-5 | 2012年 / 130-134卷

关键词：

Fatigue crack; On-line Measurement; Image processing; Camera automatically tracking; IMAGE MEASUREMENT SYSTEM;

D O I：

10.4028/www.scientific.net/AMM.130-134.3111

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fatigue crack propagation test is a very important testing way to study the metallic engineering material fatigue fracture characteristics by on-line measuring crack length under the cyclically varying loads. Crack length has been obtained through crack image capture, image processing and image analysis. In order to improve the crack measurement precision when the fatigue crack keeps growing, a new crack length real time measurement method based on the image processing and camera automatically tracking techniques was presented in this paper. This method includes the crack image processing algorithms and camera tracking and positioning movement control. The crack length measurement errors based on the camera tracking and fixed camera are respectively 0.076mm and 0.148mm. The experiment results show the proposed method has greatly improved the crack length measuring precision with the ordinary optical device.

引用

页码：3111 / 3118

页数：8

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