DOI: https://doi.org/10.15588/1607-3274-2020-1-1

RADIO ENGINEERING SYSTEM IDENTIFICATION OF METALS ON THE BASIS OF EDDY-CURRENT CONVERTERS

A. О. Abramovych, Y. S. Agalidi, V. O. Piddubnyi

Abstract


Context. The task of creating a radio system (RS) for identifying metals in the middle of subgroups of magnetic and nonmagnetic metals based on eddy current devices (ECD) is considered. The object of study is the radio identification system.

Objective. Development of a radio system that allows you to expand the possibilities of ECP by identifying a metal in a subset of non-magnetic (copper, gold, silver, etc.) and magnetic (steel, nickel) materials.

Method. A block diagram of the RS, which uses the processing of ECD signals in the time and spectral regions, is proposed. PC allows to identify the type of metal from which the control object (CO) is made, within the subsets of non-magnetic and magnetic materials, which allows to increase the probability of detecting CO hidden in a dielectric medium, made of non-ferrous, precious or ferrous metals.

The validity of the results obtained from the verification of the technique was tested on a laboratory model of the PC, which consists of an analog eddy current part and a microcontroller with ADC to transfer data to a laptop, which implements the methods of signal processing. The article proposes the hypothesis of an informative parameter and a mathematical model that explains the causes of the signal and its form. The possibility of using RS to solve the problem of metal identification within a subset of non-magnetic and magnetic materials has been experimentally confirmed.

Conclusions. Experimental studies carried out confirmed the efficiency of the proposed RS and the methods for processing the ECP signal, the software that implements it, which allows us to recommend it for the development of devices for identifying the metal from which the test object is made. Prospects for further research are to adapt mathematical and software not only to the base of metal images, but also to create images of complex objects, which will make it possible to identify a hidden metal object and thereby expand its capabilities.


Keywords


Eddy current transducer, metal control objects, metal identification.

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References


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