Eddy current apparatus including a probe arm pivoted for movemen

Details Eddy current apparatus including a probe arm pivoted for movemen Eddy current apparatus including a probe arm pivoted for movemen

1980-08-26

1984-04-03

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetic sensor within material

324262, G01N 2790

Patent

active

044410786

ABSTRACT:
Apparatus and method for detecting, by means of eddy currents, faults in a metal plate with at least one bore, comprising a differential probe constituted by two coils connected electrically to an apparatus for producing and processing signals and an apparatus for moving the probe in the bore in translation and in rotation. The probe is constituted by a probe body in which a movable element is mounted, supporting the two coils and capable of moving under the action of centrifugal force so as to be applied to the inner wall of a tube inserted in the bore. The invention particularly applies to the testing of a steam generator tube sheet.

REFERENCES:
patent: 2684464 (1954-07-01), Hastings et al.
patent: 3035353 (1962-05-01), Hovemeyer et al.
patent: 3529236 (1970-09-01), Proctor
patent: 3593122 (1971-07-01), Barton et al.
patent: 3831084 (1974-08-01), Scalese et al.
patent: 3835374 (1974-09-01), Frost
patent: 4105972 (1978-08-01), Smith
patent: 4285242 (1981-08-01), Braithwaite
patent: 4304134 (1981-12-01), Rouse et al.

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