Lift-off compensation of eddy current probes by translating with

Details Lift-off compensation of eddy current probes by translating with Lift-off compensation of eddy current probes by translating with

1983-01-11

1986-10-28

Karlsen, Ernest F.

Electricity: measuring and testing

Magnetic

With compensation for test variable

324233, G01N 2772, G01R 3312

Patent

active

046201521

ABSTRACT:
This invention relates to a method and apparatus for compensating the output signal of a reflection type eddy current probe so as to minimize the change in the phase shift of the probe output signal that otherwise would occur as a result of a change in the spacing of the probe from the surface of the metal sample being inspected or investigated.

REFERENCES:
patent: 2980849 (1969-04-01), Datt et al.
patent: 3197693 (1965-07-01), Libby
patent: 3358225 (1967-12-01), Peugeot
patent: 3496458 (1970-02-01), Bromley
patent: 4322683 (1982-03-01), Vieira et al.

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