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Eddy current probe with foil sensor mounted on flexible probe tip and method of use

United States Patent

September 11, 2001
View the Complete Patent at the US Patent & Trademark Office
A pair of copper coils are embedded in the foil strip. A first coil of the pair generates an electromagnetic field that induces eddy currents on the surface, and the second coil carries a current influenced by the eddy currents on the surface. The currents in the second coil are analyzed to obtain information on the surface eddy currents. An eddy current probe has a metal housing having a tip that is covered by a flexible conductive foil strip. The foil strip is mounted on a deformable nose at the probe tip so that the strip and coils will conform to the surface to which they are applied.
Viertl; John R. M. (Niskayuna, NY), Lee; Martin K. (Niskayuna, NY)
General Electric Company (Schenectady, NY)
09/ 468,845
December 22, 1999
This invention was made with Government support under Contract No. DE-FC21-95MC-31176 awarded by the Department of Energy. The Government has certain rights in this invention.