Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1988-11-18
1991-07-30
Snow, Walter E.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324232, 324240, G01N 2782, G01N 2772, G01R 3312
Patent
active
050362771
ABSTRACT:
A method and apparatus is provided for electromagnetically testing an elongate object such as a wire rope for cross-sectional area variations. The elongate object is magnetized over adjacent sections in opposing directions along a longitudinal axis of the elongate object. Variations in axial magnetic flux, which have been observed to be coincident with variations in the cross-sectional area of an elongate object, are measured by a plurality of non-inductive transducers. The transducers are interconnected to produce a composite signal. The composite signal is compared to a reference signal.
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Crucible Societe Anonyme
Snow Walter E.
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