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Optical Monitoring of Weld PenetrationRobotic welding controlled by reliable, relatively-noise-free optoelectronic unit. Bounding off meniscus of pool of molten metal, laser beam impinges on position-sensitive photodetector. Beam diameter adjusted for width of weld. Optical filters screen out light from arc. Made from small, low-cost components and utilizing optical fibers to conduct signals, system immune to electromagnetic interference common in industrial environments. Aimed for automatic welders, robot welders in particular and also adaptable to other types of welding, including tungsten/inert-gas, laser, and electron-beam techniques.
Document ID
19860000187
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Maram, J.
(Rockwell International Corp.)
Date Acquired
August 12, 2013
Publication Date
June 1, 1986
Publication Information
Publication: NASA Tech Briefs
Volume: 10
Issue: 2
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MFS-29107
Accession Number
86B10187
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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