Electricity: measuring and testing – Determining nonelectric properties by measuring electric...
Reexamination Certificate
2005-12-27
2005-12-27
Le, N. (Department: 2858)
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
C324S691000
Reexamination Certificate
active
06979991
ABSTRACT:
A method and apparatus are provided for inspecting a coated substrate such as a multi-layer coating on a substrate of a turbine airfoil. At each of a number of locations along the airfoil a number of frequencies of alternating current are passed through the airfoil. At least one impedance parameter is measured. The measured impedance parameters are utilized to determine a condition of the coating.
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Bose Sudhangshu
Burns Steven M.
Bachman & LaPointe P.C.
Benson Walter
Le N.
United Technologies Corporation
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