Combined thermoelectric and eddy-current method and apparatus fo

Details Combined thermoelectric and eddy-current method and apparatus fo Combined thermoelectric and eddy-current method and apparatus fo

1993-06-09

1995-07-04

Wieder, Kenneth A.

Electricity: measuring and testing

Magnetic

Plural tests

324226, 324237, 324238, 324240, 324242, G01N 2790

Patent

active

054303761

ABSTRACT:
A microcomputer or PC based non-destructive coated-object testing system and method combines thermoelectrically measured surface coating thickness data with flaw/crack depth data determined from eddy current measurements of the surface of the object to locate and selectively identify faults or cracks which penetrate the surface coating. The microcomputer controls scanning of eddy-current and thermoelectric probes over the object surface and stores measured data along with surface coordinate information to provide a color-keyed graphics display of surface conditions for visual analysis.

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