Measurement head for welding machines

Details Measurement head for welding machines Measurement head for welding machines

G - Physics

01

B

340/136, 354/25,

G01B 11/24 (2006.01) B23K 11/10 (2006.01) G01S 17/46 (2006.01)

Patent

CA 1202117

- 17 - ABSTRACT OF THE DISCLOSURE 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.

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