Plural frequency multi-phase transducer arrangement for detectin

Details Plural frequency multi-phase transducer arrangement for detectin Plural frequency multi-phase transducer arrangement for detectin

1975-04-30

1976-07-27

Corcoran, Robert J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3312

Patent

active

039719820

ABSTRACT:
Improved apparatus for detecting and locating defects in metal bodies of the type in which the body under test is difficult to keep centered in which a multi-phase transducer coil induces currents in the body which are detected by a secondary transducer coil providing fault and position information. In the preferred embodiment two different frequencies are induced with one frequency used to compensate the other for variations with respect to a central location within the confines of the secondary coil.

REFERENCES:
patent: 2065118 (1936-12-01), Davis, Jr.

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