Apparatus for determining dynamic gaps between a proximity probe and a conductive target material
First Claim
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1. An apparatus for determining a dynamic gaps between a proximity probe and a conductive target material, said apparatus comprising in combination:
- means for establishing dynamic voltage signals correlative to dynamic gaps between a proximity probe and a conductive target material;
sampling means for digitizing said established dynamic voltage signals into digital voltage signals;
a digital multiplier for multiplying each said digital voltage signal by a digital sine signal and a digital cosine signal;
means for accumulating values of each multiply in a memory, and means for processing each multiply for obtaining complex voltage representations correlative to dynamic gaps between said proximity probe and a conductive target material.
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Abstract
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 automatic material identification and calibration method, a material insensitive method, an inductive ratio method and advanced sensing characteristics.
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Citations
5 Claims
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1. An apparatus for determining a dynamic gaps between a proximity probe and a conductive target material, said apparatus comprising in combination:
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means for establishing dynamic voltage signals correlative to dynamic gaps between a proximity probe and a conductive target material;
sampling means for digitizing said established dynamic voltage signals into digital voltage signals;
a digital multiplier for multiplying each said digital voltage signal by a digital sine signal and a digital cosine signal;
means for accumulating values of each multiply in a memory, and means for processing each multiply for obtaining complex voltage representations correlative to dynamic gaps between said proximity probe and a conductive target material. - View Dependent Claims (2, 3, 4, 5)
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Specification