Eddy current probe, incorporating multi-bracelets of different p

Details Eddy current probe, incorporating multi-bracelets of different p Eddy current probe, incorporating multi-bracelets of different p

1990-06-08

1991-09-17

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

324225, 324232, G01N 2790, G01R 3312

Patent

active

050498177

ABSTRACT:
Eddy current probes for detecting internal defects in a ferromagnetic tube are disclosed. The probe uses a plurality of eddy current measuring means, each being operated at a different operating point on the impedance diagram. By operating more than one such eddy current measuring means simutaneously, noises by, for example, permeability variation of a ferromagnetic material and internal magnetic deposit, can be made less influential.

REFERENCES:
patent: 2124579 (1938-07-01), Knerr et al.
patent: 4808924 (1989-02-01), Cecco et al.
patent: 4808927 (1989-02-01), Cecco et al.
patent: 4855677 (1989-08-01), Clark, Jr. et al.

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