Infrared sensor for arc welding

Details Infrared sensor for arc welding Infrared sensor for arc welding

1982-04-26

1984-11-20

Shaw, C. C.

Electric heating

Metal heating

By arc

21912434, 21913021, B23K 910

Patent

active

044840594

ABSTRACT:
An infrared detector is provided with spectral filtering means for direct observation of the arc region during electric arc welding operations. The filter permits direct observation of the weld pool by suppressing almost all of the infrared radiation produced by the arc itself. Were this not the case, the electrical signal output from the infrared detector is totally obscured by the intense infrared radiation from the arc and would thus not permit sufficiently high resolution infrared measurements to be made on the weld pool and the work piece.

REFERENCES:
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patent: 3666949 (1972-05-01), DeFalco et al.
patent: 4280137 (1981-07-01), Ashida et al.
patent: 4302655 (1981-11-01), Edling
patent: 4316075 (1982-02-01), Isoya et al.
patent: 4316076 (1982-02-01), Balfanz
"Development of Weld Pool Imaging Techniques for the Adaptive Control of Gas Tungsten Arc Welding", S. Hanumanth Rao, Thesis Presented to The Ohio State University, 1981.

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