An integrated visual system for solder inspection

Author

Odawara, Gotaro ; Kurokawa, Tsutomu ; Tamiya, Yutaka ; Fuji, Tatsuya

Author_Institution

Dept. of Precision Eng., Tokyo Univ., Japan

fYear

1988

Firstpage

663

Abstract

A technique is described for real-time solder joint inspection for printed wiring boards. It uses reflection on the specular solder surface projected by a straight-shaped light source (a straight fluorescent tube). For image processing, modified Hough transformation is adopted to approximate the image of the fluorescent tube reflected on a solder joint to a straight line. These processes are performed on special-purpose hardware to achieve video-rate processing. Experimental results have demonstrated sufficient detection capability

Keywords

circuit analysis computing; computer vision; computerised pattern recognition; computerised picture processing; fault location; inspection; printed circuit testing; production testing; computer vision; fault location; image processing; integrated visual system; modified Hough transformation; pattern recognition; printed wiring boards; production testing; real-time solder joint inspection; reflection; specular solder surface; straight fluorescent tube; straight-shaped light source; Charge coupled devices; Charge-coupled image sensors; Fluorescence; Hardware; Inspection; Light sources; Lighting; Optical reflection; Soldering; Visual system;

fLanguage

English

Publisher

ieee

Conference_Titel

Pattern Recognition, 1988., 9th International Conference on

Conference_Location

Rome

Print_ISBN

0-8186-0878-1

Type

conf

DOI

10.1109/ICPR.1988.28321

Filename

28321