Electricity: measuring and testing – Magnetic – Calibration
Patent
1990-04-17
1991-05-28
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Calibration
73 1R, G01R 3500
Patent
active
050197754
ABSTRACT:
A system for photoinductive imaging for flaw detection of materials and for calibrating eddy-current probes includes positioning an eddy-current probe adjacent to a specimen to be analyzed or to be used as a calibration fixture. A source of thermal energy is modulated and focused to a localized area on the specimen. Thermal energy is then scanned across at least a portion of the detection area of the eddy-probe. The resulting signal from the eddy-current probe is recorded and can depict either thermal-influenced components of the specimen or the response pattern of the eddy-current probe. The record can therefore be used to image flaws or physical holes or shapes of the specimen or calibrate the eddy-current probe.
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Moulder John C.
Rose James H.
Iowa State University & Research Foundation, Inc.
Snow Walter E.
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