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TECHNICAL PAPERS

Precision Sensing of Arc Length in GTAW Based on Arc Light Spectrum

[+] Author and Article Information
P. J. Li, Y. M. Zhang

Welding Research and Development Laboratory, Center for Robotics and Manufacturing Systems and Department of Electrical Engineering, University of Kentucky, Lexington, KY 40506-0108

J. Manuf. Sci. Eng 123(1), 62-65 (Feb 01, 2000) (4 pages) doi:10.1115/1.1349719 History: Received February 01, 1999; Revised February 01, 2000
Copyright © 2001 by ASME
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References

Figures

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Effect of base metal in spectral distribution
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Arc voltage versus arc length
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Arc light sensor output versus arc length, without optical filter, spectral range of the arc light sensor 450 nm to 1100 nm, peak response 880 nm
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Filtered arc light sensor output versus arc length. Half-width: 15 nm, wavelength: 696.5 nm.
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Arc length control experiment under step disturbance

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