Eddy current test system including a member of high permeability

Details Eddy current test system including a member of high permeability Eddy current test system including a member of high permeability

1986-07-01

1987-04-21

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324233, G01N 2782

Patent

active

046599908

ABSTRACT:
An eddy current testing system is disclosed in which a pair of thin one-layer windings are disposed against a pair of thin plates of high permeability magnetic material, about aligned openings in the plates through which a wire is passed, pits and inclusions in the wire being detected by comparing signals corresponding to the electrical impedances on the two windings. The plates of high permeability magnetic material operate to concentrate magnetic flux in small regions of the wire, to obtain a high resolution.

REFERENCES:
patent: 2999977 (1961-09-01), Brown
patent: 3786672 (1974-01-01), Gaerttner
patent: 3840802 (1974-10-01), Anthony
patent: 3872379 (1975-03-01), Brooks et al.
patent: 4002967 (1977-01-01), Fennell
patent: 4075591 (1978-02-01), Haas
patent: 4204159 (1980-05-01), Savian et al.
patent: 4486731 (1984-12-01), Westcott

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