3 May 2016 Improved feedback amplifier for electromagnetic induction sensors
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Abstract
A method using feedback is presented that reduces several measurement errors inherent in electromagnetic induction sensors. Errors associated with coupling between receive coils and errors associated with operating near magnetic soils will both be reduced. The method uses feedback that is directly injected into the receive coils and does not require secondary coils. A simple circuit is introduced to perform the feedback and is optimized to reduce the errors and make the circuit stable. Experimental results are presented to show the effectiveness of the feedback.
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Waymond R. Scott, Waymond R. Scott, } "Improved feedback amplifier for electromagnetic induction sensors", Proc. SPIE 9823, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXI, 982303 (3 May 2016); doi: 10.1117/12.2224199; https://doi.org/10.1117/12.2224199
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