Automatic inspection system for stain and dent default in switch manufacturing

Joan Marti; Toni Verdu; Joan Batlle

doi:10.1117/12.205500

27 March 1995 Automatic inspection system for stain and dent default in switch manufacturing

Joan Marti, Toni Verdu, Joan Batlle

Proceedings Volume 2423, Machine Vision Applications in Industrial Inspection III; (1995) https://doi.org/10.1117/12.205500
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

Quality control in switch manufacturing requires both an electrical test and full analysis of switch's plastic surface to mount. This paper describes an automatic system for stain and dent fault-detection for the plastic surface of switches during its manufacturing. Two different images of every switch are used: in the former, the switch is illuminated with fuzzy and uniform white light intended to magnify the visual effects of the stain; in the latter, a known striped pattern is projected on the switch so that a dent or a bump at the plastic surface will result in a modified pattern that would easily be detected by the system. The inspection unit is designed to operate as a real-time and low-cost system. So, a single inspection unit takes and processes both pictures. Furthermore, another operation is performed for unfaulty parts that pass the inspection test: they are properly oriented for further assembling processes based on their serigraphied symbols. Some improvements could be made to the system at the expense of low-cost constraints that involve better accuracy and provide with more robustness in few specific cases.

Citation Download Citation

Joan Marti, Toni Verdu, and Joan Batlle "Automatic inspection system for stain and dent default in switch manufacturing", Proc. SPIE 2423, Machine Vision Applications in Industrial Inspection III, (27 March 1995); https://doi.org/10.1117/12.205500

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