Method and installation for selective detection of defects in a

Details Method and installation for selective detection of defects in a Method and installation for selective detection of defects in a

1985-04-03

1987-05-19

Birmiel, Howard A.

Measuring and testing

Vibration

By mechanical waves

73637, 73638, 73640, G01N 2904

Patent

active

046657347

ABSTRACT:
For selective detection of microscopic defects in a workpiece to be checked presenting at least one macroscopic discontinuity of known nature, upon relative motion in respect to such workpiece according to a given check line, detecting the times when such check line meets a discontinuity, and searching for any possible defects in the workpiece intermittently for time intervals defined in reference to said times. This applies in particular to inspection of weld seams of welded tubes.

REFERENCES:
patent: 3346807 (1967-10-01), Wood et al.
patent: 3543566 (1970-12-01), Sulmart
patent: 3732726 (1973-05-01), Ferber
patent: 3926040 (1975-12-01), Cowell
patent: 4006359 (1977-02-01), Sullins et al.
patent: 4289033 (1981-09-01), Prause et al.
patent: 4506549 (1985-03-01), Thane
patent: 4523468 (1985-06-01), Derkacs et al.

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