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Proceedings Paper

Automatic inspection system for stain and dent default in switch manufacturing
Author(s): Joan Marti; Toni Verdu; Joan Batlle
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Paper 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.

Paper Details

Date Published: 27 March 1995
PDF: 8 pages
Proc. SPIE 2423, Machine Vision Applications in Industrial Inspection III, (27 March 1995); doi: 10.1117/12.205500
Show Author Affiliations
Joan Marti, Univ. de Girona (Spain)
Toni Verdu, Univ. de Girona (Spain)
Joan Batlle, Univ. de Girona (Spain)


Published in SPIE Proceedings Vol. 2423:
Machine Vision Applications in Industrial Inspection III
Frederick Y. Wu; Stephen S. Wilson, Editor(s)

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