A digital eddy current proximity system including a digital impedance measuring device for digitally measuring the proximity probes impedance correlative to displacement motion and position of a metallic target object being monitored. The system further including a cable-length calibration method, an...http://www.google.fr/patents/US6765395?utm_source=gb-gplus-shareBrevet US6765395 - Method for measuring a gap between a proximity probe and a conductive target material
Method for measuring a gap between a proximity probe and a conductive target ...
