Beam/seam alignment control for electron beam welding

Details Beam/seam alignment control for electron beam welding Beam/seam alignment control for electron beam welding

1978-08-24

1980-01-08

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 93, H06N 718

Patent

active

041830555

ABSTRACT:
This invention relates to a dynamic beam/seam alignment control system for electron beam welds utilizing video apparatus. The system includes automatic control of workpiece illumination, near infrared illumination of the workpiece to limit the range of illumination and camera sensitivity adjustment, curve fitting of seam position data to obtain an accurate measure of beam/seam alignment, and automatic beam detection and calculation of the threshold beam level from the peak beam level of the preceding video line to locate the beam or seam edges.

REFERENCES:
patent: 3301949 (1967-01-01), Ullery
patent: 3532807 (1970-10-01), Webb
patent: 4001497 (1977-01-01), Bosworth
patent: 4021840 (1977-03-01), Ellsworth
patent: 4062046 (1977-12-01), Pratt

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