Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1991-05-06
1993-08-17
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324238, 324240, G01N 2790
Patent
active
052372715
ABSTRACT:
A method for improving eddy current flaw detection by simultaneously exciting a select plurality of eddy current probe elements with a multiplicity of select frequencies in a simultaneous parallel or serial manner to form a corresponding multiplicity of direct and/or differential images which can be processed together for improved eddy current image resolution. Select eddy current probe elements when driven at select multiple frequencies further provide a capability for simultaneous flaw detection and characterization by dual resolution scanning. Dual flaw resolution is accomplished by first locating a flaw using low resolution frequencies; and thereupon, switching to higher resolution frequencies to characterize the flaw.
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Edmonds Warren S.
General Electric Company
McDaniel James R.
Strecker Gerard R.
Webb II Paul R.
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