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Metal detector excited by frequency-swept signal

Svatoš J., Vedral J., Fexa P.

Metrology and Measurement Systems

2011

Vol. 18, nr 1

57-67

This paper describes the theoretical background of electromagnetic induction from metal objects modelling. The response function of a specific case of object shape - a homogenous sphere from ferromagnetic and nonferromagnetic material is introduced. Experimental data measured by a metal detector excited with a linearly frequency-swept signal are presented. As a testing target various spheres from different materials and sizes were used. These results should lead to better identification of the buried object.