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Systems and Methods for Detection of Dielectric Change in Material and Structure

Abstract: 

Methods and systems are described for efficiently detecting an object. The system includes at least one electrode for measuring a displacement current. The at least one electrode is coupled to a floating ground configuration provided by an op-amp, where the inverting node of the op-amp is coupled to electrode and the non-inverting node is coupled to a signal generator. The system may include a single capacitance sensor for detecting an object. Systems may include a plurality of capacitance sensors in an array configuration for detecting an object.

Patent Number: 
7,288,945
Date Of Issue: 
10/30/2007
Inventors: 

Robert E. Martinez; Stephen A. Cerwin; Todd H. Goyen