Automatic Visual Inspection System of Gas Valve’s External Taper Thread Based on Image Domain

The failure of the gas valve’s external screw taper thread is a very serious problem which may result in accidents. Routine inspection on the threads are thus necessary. The efficiency of traditional manual testing methods can not meet the production requirements. An automatic visual inspection syst...

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Bibliographic Details
Published inApplied Mechanics and Materials Vol. 37-38; pp. 207 - 212
Main Authors Zhang, Xu, Zhang, Xue Сhang, Lou, Ying Hou, Chen, Jun Hua
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.11.2010
Subjects
Visual Inspection
External Taper Thread
Image Domain
Gas Valve
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Summary:The failure of the gas valve’s external screw taper thread is a very serious problem which may result in accidents. Routine inspection on the threads are thus necessary. The efficiency of traditional manual testing methods can not meet the production requirements. An automatic visual inspection system for gas valve’s exteranl screw taper thread was presented in the paper. The system consists of a high-performance 200 megapixels CCD camera, a LED backlight and a holder of gas valve. Through image acquisition, image processing, edge detection and feature dimension measurement, the system can effectively measure the parameters of taper thread such as angle of thread, depth of thread, taper angle of thread on image domain. It can meet the testing requirements of the external screw taper thread and has wide application perspective.
Bibliography:Selected, peer-reviewed papers from the International Conference on Engineering Design and Optimization (ICEDO 2010), 28-30 October 2010, Ningbo, P. R. China
ISBN:0878492224
9780878492220
ISSN:1660-9336
1662-7482
1662-7482
DOI:10.4028/www.scientific.net/AMM.37-38.207