A novel internal thread defect auto-inspection system

被引：42

作者：

Perng, Der-Baau ^{[1
]}

Chen, Ssu-Han ^{[1
]}

Chang, Yuan-Shuo ^{[1
]}

机构：

[1] Natl Chiao Tung Univ, Dept Ind Engn & Management, Hsinchu 30010, Taiwan

来源：

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2010年 / 47卷 / 5-8期

关键词：

Internal thread; Rigid industrial endoscope; Machine vision; Directional texture; Fourier-based image restoration scheme; AUTOMATED SURFACE INSPECTION; LEADING-EDGE REGION; TURBINE BLADE; AEROSPACE; HOLES; ROWS;

D O I：

10.1007/s00170-009-2211-8

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper describes a novel optical thread plug gauge (OTPG) for internal thread inspection using machine vision. The OTPG is composed of a rigid industrial endoscope, a charge-coupled device camera, and a two degree-of-freedom motion control unit. A sequence of partial wall images of an internal thread are retrieved and reconstructed into a 2D unwrapped image. Then, a digital image processing and classification procedure is used to normalize, segment, and determine the quality of the internal thread. The proposed OTPG provides an orientation-free and convenient method for detecting defects such as scratches, collapses, and flaws in an internal thread.

引用

页码：731 / 743

页数：13

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