Laser weld fault detection system

Details Laser weld fault detection system Laser weld fault detection system

1990-08-16

1992-06-09

Lall, Parshotam S.

Boots, shoes, and leggings

364552, 21913001, G01N 2914, B23K 2600

Patent

active

051213397

ABSTRACT:
An on-line, non-destructive method and apparatus monitors a welding process and detects faulty welds by analyzing the average frequency of the airborne radiation emitted from a weld during the welding process. A sequence of measured average frequency values corresponding to sequential blocks of time during the weld are individually compared to a predetermined frequency threshold value. Overall weld integrity is discerned by comparing the number of average frequency values exceeding the threshold value to the number of average frequency values not exceeding the threshold value.

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