Automatic Control of Arc Welding (Report II) : Optical Sensing of Joint Configuration
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A new method has been developed, in which an optical sensor was utilized for sensing and monitoring the joint configuration during arc welding. This method is characterized by using the light which is emitted from the welding arc. Using this sensing method, the position of the electrode in space relative to the joint axis and the joint preparation (the groove width and depth, etc.) can be sensed in the arcing zone during the welding process. Sensing resolution can be very fine provided that an optical system is properly chosen. Sensing ability depends on the welding condition, such as arc voltage and arc current. This dependency was investigated experimentally and the sensing ability index was obtained from the experimental results following the special formula described later. This index can give the universal data for the design of the joint configuration sensor of this type.
- Transactions of JWRI
Transactions of JWRI 2(1), 87-101, 1973-02