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Proceedings Paper

Novel low-cost vision-sensing technology with controllable of exposal time for welding
Author(s): Wenzeng Zhang; Bin Wang; Nian Chen; Yipeng Cao
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Paper Abstract

In the process of robot Welding, position of welding seam and welding pool shape is detected by CCD camera for quality control and seam tracking in real-time. It is difficult to always get a clear welding image in some welding methods, such as TIG welding. A novel idea that the exposal time of CCD camera is automatically controlled by arc voltage or arc luminance is proposed to get clear welding image. A set of special device and circuits are added to a common industrial CCD camera in order to flexibly control the CCD to start or close exposal by control of the internal clearing signal of the accumulated charge. Two special vision sensors according to the idea are developed. Their exposal grabbing can be triggered respectively by the arc voltage and the variety of the arc luminance. Two prototypes have been designed and manufactured. Experiments show that they can stably grab clear welding images at appointed moment, which is a basic for the feedback control of automatic welding.

Paper Details

Date Published: 14 February 2005
PDF: 11 pages
Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005); doi: 10.1117/12.574001
Show Author Affiliations
Wenzeng Zhang, Tsinghua Univ. (China)
Bin Wang, Tsinghua Univ. (China)
Nian Chen, Tsinghua Univ. (China)
Yipeng Cao, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 5634:
Advanced Sensor Systems and Applications II
Yun-Jiang Rao; Osuk Y. Kwon; Gang-Ding Peng, Editor(s)

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