Patent ID: 9279784
Filing Date: 2016-03-08
CPC Classification: G01N,G01R

Claim Text:
1. A system for measuring an eddy-current sensor response, the system comprising: a reference transformer having a primary winding and a secondary winding, wherein the secondary winding is configured to be connected in series with a sense element of the eddy-current sensor; a source for providing a drive signal to the primary winding; an impedance analyzer configured to measure a first transimpedance of the series connected secondary winding and the sense element while the primary winding is excited by the source, and further configured to measure a second transimpedance of the series connected secondary winding and sense element while a drive winding of the sensor is excited; and a processor configured to compute a calibrated transimpedance measurement using the first transimpedance and the second transimpedance.