Eddy current probe having four active elements arranged in a qua

Details Eddy current probe having four active elements arranged in a qua Eddy current probe having four active elements arranged in a qua

1997-12-23

2000-01-25

Snow, Walter E.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324241, 324243, G01R 3312, G01N 2772

Patent

active

060182423

ABSTRACT:
An eddy current probe for the nondestructive testing of electrically conductive material parts comprises four identical active elements (10a, 10b, 10c, 10d), at lease in pairs, whose centers are arranged in accordance with a square or a quadrilateral, whose diagonals intersect at right angles and have an intersection point located in the center of one of them. The major axes (18a, 18b, 18c, 18d) of said elements are oriented perpendicular to the plane of the square or intersect at the same point on the normal to the center of the square. The active elements are generally windings. Preferably, opposite windings (10a, 10c and 10b, 10d) of the square are connected pairwise in series, so as to produce magnetic fields, which are summated according to the diagonals of the square and the two pairs are connected to one another according to a differential arrangement or circuit.

REFERENCES:
patent: 4107605 (1978-08-01), Hudgell

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