Eddy current sensor for non-destructive testing the quality of e

Details Eddy current sensor for non-destructive testing the quality of e Eddy current sensor for non-destructive testing the quality of e

1976-02-06

1977-11-29

Corcoran, Robert J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

209 81R, G01R 3312

Patent

active

040607607

ABSTRACT:
An eddy current sensor for non-destructive testing the quality of electrically conductive through-hole plating in printed circuit boards in which a magnetic probe member is provided with a device for moving the probe enveloping its exciting winding and two opposing measuring windings which are magnetically coupled with the exciting winding. These exciting and two opposing measuring windings are rigidly connected so that the exciting winding is positioned between the measuring windings with gaps provided to insert a printed circuit board to be tested. The magnetic probe member is inserted into the hole with the help of the device for moving the probe.

REFERENCES:
patent: 2985300 (1961-05-01), Boehm et al.
patent: 3718855 (1973-02-01), Rogel et al.
patent: 3825822 (1974-07-01), Forster
patent: 3840802 (1974-10-01), Anthony

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