Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1984-06-27
1987-06-16
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324238, 324237, 324262, 336 84C, G01N 2790, G01N 2782, G01R 3312
Patent
active
046738797
ABSTRACT:
Method and apparatus for scanning a generally cylindrical workpiece for flaws. A cylindrical metallic sleeve is rotatably supported about a workpiece path of travel. Two differentially wound energization coils surround the sleeve near two apertures in the sleeve. The coils are energized with a high frequency signal that induces eddy currents in the workpiece. The apertures periodically disrupt the eddy current inducing magnetic fields and enhances signals from the coils indicative of the presence of flaws in the workpiece.
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Abramczyk Richard F.
Harris Richard M.
Toth James M.
Valek David A.
Edmonds Warren S.
Eisenzopf Reinhard J.
Rupublic Steel Corporation
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