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Apparatus and method for detecting flaws in conductive material

United States Patent

5,986,452
November 16, 1999
View the Complete Patent at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
The present invention is an improved sensing unit for detecting flaws in conductive material wherein the sensing coil is positioned away from a datum of either the datum point, the datum orientation, or a combination thereof. Position of the sensing coil away from a datum increases sensitivity for detecting flaws having a characteristic volume less than about 1 mm.sup.3, and further permits detection of subsurface flaws. Use of multiple sensing coils permits quantification of flaw area or volume.
Hockey; Ronald L. (Richland, WA), Riechers; Douglas M. (Richland, WA)
Battelle Memorial Institute (Richland, WA)
08/ 982,704
December 2, 1997
This invention was made with Government support under Contract DE-AC06-76RLO 1830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.