Eddy current device for inspecting a component having a flexible

Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material

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324232, 324262, 336200, G01N 2782, G01R 3312, H01F 2102

Patent

active

053152344

ABSTRACT:
An eddy current device for inspecting a component includes an eddy current array circuit having respective pluralities of drive and sense elements and having an active face for positioning on a surface of the component during the inspection operation. A backing is disposed on a face of the eddy current array circuit opposite to the active face for concentrating an electromagnetic flux from the eddy current array circuit into the component when each of the plurality of drive elements is being energized. A mechanical arrangement is provided for supporting and deploying the backing and the array circuit to substantially conform with the surface portion under inspection and to cause each of the pluralities of drive and sense elements to be maintained at their respective substantially constant distances from the inspection surface during scanning, preferably at a controlled rate of scan.

REFERENCES:
patent: 2622125 (1952-12-01), Bender
patent: 4543528 (1985-09-01), Baraona
patent: 4593245 (1986-06-01), Viertl et al.
patent: 4668912 (1987-05-01), Junker
patent: 4719422 (1988-01-01), deWalle et al.
patent: 5023549 (1991-06-01), Dau et al.
patent: 5047719 (1991-09-01), Johnson et al.
S. Oaten and J. Bertelle, "Robot Controlled Inspection of Roto-Symmetrical Parts", 1992 ASNT Spring Conference, NDE-The Vehicle to the Future, pp. 117-119.
Patent Abstracts of Japan, vol. 16, No. 52(E-1164) 10 Feb. 1992 & JP-A-32 54 103 (Kawasaki) 13 Nov. 1991, Abstract.
Database WPI, Week 9002, Derwent Publications Ltd., London, GB; AN 90-008592 & DE-A-39 19 976 (Nippon Antenna) 28 Dec. 1989, Abstract.

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