G - Physics – 01 – N
Patent
G - Physics
01
N
324/50
G01N 27/90 (2006.01)
Patent
CA 1284180
Electronically Scanned Eddy Current Flaw Inspection Abstract Method and apparatus for performing eddy current flaw inspection on workpiece material such as steel bar stock. A drive mechanism propels a workpiece longitu- dinally along a workpiece path. An array of electro- magnetic transmitter coils is disposed about the workpiece path. An electromagnetic source energizes the transmitter coils under control of multiplexing circuitry. The multiplexing circuitry and source actuate respective transmitter coils in a predetermined iterative sequence. This sequential actuation induces eddy currents in the workpiece at a succession of locations extending iteratively about the workpiece circumference. Circuitry coupled to multiple, differentially wound sensing coils detects variations in eddy currents produced in the workpiece and utilizes these detected variations to produce flaw indicating signals.
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Abramczyk Richard F.
Aron Steven J. Jr.
Harris Richard M.
Toth James M.
Abramczyk Richard F.
Aron Steven J. Jr.
Harris Richard M.
Ltv Steel Company Inc.
Ridout & Maybee Llp
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