Eddy current converter for non-destructive testing of electrical

Details Eddy current converter for non-destructive testing of electrical Eddy current converter for non-destructive testing of electrical

1976-01-27

1978-02-07

Corcoran, Robert J.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324237, G01R 3312

Patent

active

040728951

ABSTRACT:
The proposed eddy current converter for non-destructive testing of electrically conductive coating in holes of printed circuit boards comprises a cylindrical frame enveloped by an exciting winding and a measuring winding and inserted into a hole of a printed circuit board being tested. The coils of the exciting and measuring windings extend along the generatrices of the cylindrical frame.
With the use of the proposed converter, the testing accuracy is independent of the parameters of respective contact areas of a hole being tested. The converter of the present invention is sensitive to the most undesired flaws like transversely extending cracks.

REFERENCES:
patent: 2844787 (1958-07-01), McCann
patent: 3495166 (1970-02-01), Lorenzi et al.
patent: 3840802 (1974-10-01), Anthony

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