Online quality monitoring of perforated steel strips using an automated visual inspection (AVI) system

This study presents an automated visual inspection (AVI) system to monitor dimensional quality during a steel strip perforation process. In the considered process (razor blade perforation) several dimensional quality parameters (e.g. pitch, strip width, centrality, slot width, ...) are estimated on...

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Bibliographic Details
Published in2011 IEEE International Conference on Quality and Reliability pp. 575 - 579
Main Authors Younes, M. A., Darwish, S., El-Sayed, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2011
Subjects
Adaptive optics
AVI systems
Blades
Inspection
Integrated optics
Machine vision
on line quality monitoring
Optical variables measurement
strip perforation
Strips
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Summary:This study presents an automated visual inspection (AVI) system to monitor dimensional quality during a steel strip perforation process. In the considered process (razor blade perforation) several dimensional quality parameters (e.g. pitch, strip width, centrality, slot width, ...) are estimated on line with strip speeds up to 30m/min. The dimensions are estimated accurately by applying sub-pixel edge detection techniques on gray intensity images. Telecentric lens and high shutter speed monochrome camera are used. Effect of strip speed and shutter speed on both measurement accuracy and repeatability has been investigated. A maximum error in the order of 2μm was recorded after eliminating zero shifts. Repeatability better than ±1.5μm (at 99% confidence level) is readily achievable on all estimated dimensions at a speed of 30m/min.
ISBN:9781457706264
1457706261
DOI:10.1109/ICQR.2011.6031605