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Analysis of an electromagnetic induction detector for real-time location of buried objects

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4 Author(s)
Das, Y. ; Defence Res. Establ. Suffield, Medicine Hat, Alta., Canada ; Mcfee, John E. ; Toews, J. ; Stuart, G.C.

Spatial response characteristics of an electromagnetic induction sensor as it passes over a metallic object are investigated using a simple analytical technique. In this low-frequency technique, one replaces a metallic object with equivalent electric and magnetic dipoles and then applies the principles of reciprocity to obtain the induced EMF in a sensor coil. Analysis is carried out for a sensor employing rectangular coils, and the object set is confined to a sphere and a prolate spheroid. The simple approach, which is illustrated with both numerical and experimental data, is found to be adequate to understand the effect on the response characteristics of parameters such as object depth, orientation, aspect ratio, and material properties

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:28 ,  Issue: 3 )

Date of Publication:

May 1990

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