Eddy current detector for detecting an object with offset compen

Details Eddy current detector for detecting an object with offset compen Eddy current detector for detecting an object with offset compen

1991-04-23

1992-09-01

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

324166, 32420712, 32420725, 324225, 328 5, 328167, 329349, 364565, 36457101, 364572, G01P 349, G01P 3489, H03D 104, H03H 1700

Patent

active

051442310

ABSTRACT:
An RF oscillator induces eddy currents to be measured in an object. An eddy current probe senses alterations, such as teeth on a disc, for example, in the object which are represented as eddy current signals sensed by an eddy current probe. The present invention separates alteration current signals from offset currents in the eddy current signal to aid in discriminating levels in the alteration current signals. The alteration currents are separated from the offset currents by AC coupling with a high pass filter or separated by a microprocessor as part of a data processing detection routine.

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