Method and apparatus for phase sensitive detection of eddy current measurements

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United States of America Patent

PATENT NO 8680852
APP PUB NO 20100327860A1
SERIAL NO

12866536

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Abstract

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A method of detecting defects using eddy currents is disclosed. The method comprises:

    exciting eddy currents in a test material using an eddy current probe driven by a drive signal;detecting induced eddy currents in the test material;converting the detected signal into integer values using an analog to digital converter; andadding or subtracting the generated integer values to or from each of two accumulators, or taking no action, so that one accumulator produces a value proportional to one component of the detected signal and the other produces a value proportional to another component of the detected signal and using these values to detect the presence of a defect.

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Patent Owner(s)

Patent OwnerAddress
GE INSPECTION TECHNOLOGIES LTD240 THE VILLAGE BUTTERFIELD LUTON BEDFORDSHIRE LU2 8DL

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Daly, Alan Luton, GB 1 8
Hansen, John Harpenden, GB 22 168
Mayes, Ian Christopher Ampthill, GB 6 43
Qiao, Xiaoyu Hatfield, GB 10 45

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