Rationing signals from eddy current transducer for faithful comparison
Journal Title: Вісник Тернопільського національного технічного університету - Year 2017, Vol 86, Issue 2
Abstract
The problem of detecting metal objects in different environments has always been important. Optimal for dichotomous distinction metals are impulsive VLF metal type. Transmitting antenna of the metal detector emits primary electromagnetic field which adopted the receiving antenna configured to the absence of metal objects between transmitting and receiving antennas at the receiver input signal was minimal. In modern metal detectors identify the type of metal is by providing informative signal to background interfering factor. Now use the amplitude, phase and frequency domain signal processing. Permittivity and magnetic permeability for nonferrous and ferrous metals are different, resulting in different amplitude of the signal at the input of the receiving antenna. Therefore, for correct comparison of signals other than the method of distinguishing threshold required for the normalization of their amplitude. Also investigated environment scanning antenna by hand, and it requires normalization of the received signal in duration. The solution to this problem and is devoted this article
Authors and Affiliations
Anton Abramovych, Volodymyr Piddubnyi
Keywords
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