Measurement head for welding machines

Details Measurement head for welding machines Measurement head for welding machines

1984-03-23

1986-01-28

Shaw, Clifford C.

Electric heating

Metal heating

By arc

250202, 250553, 356 4, 356376, B23K 910

Patent

active

045673470

ABSTRACT:
A measurement head in an arc welding machine modulates the light intensity of a laser light beam with a modulating signal of 50 KHz or higher, and radiates the laser light beam onto an object to be measured while changing the direction of laser beam emission in one plane. A light receiving unit in the measurement head changes its direction of detecting a reflected beam in the same plane. Angles at which the light beams are emitted and detected are detected at the time a modulated signal component is detected from an output from the light receiving unit. The position of a bright spot produced on the surface by the radiated laser light beam is computed from the detected angles based on the principle of triangulation.

REFERENCES:
patent: 4146327 (1979-03-01), Harris
patent: 4146926 (1979-03-01), Clerget et al.
patent: 4266875 (1981-05-01), Bodlaj
patent: 4402608 (1983-09-01), DiMatteo et al.
patent: 4479717 (1984-10-01), Cornillault
patent: 4493968 (1985-01-01), Brown
patent: 4494868 (1985-01-01), Lambeth

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