"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 10, 2018

contents of issue      DOI  10.30898/1684-1719.2018.10.19     full text in Russian (pdf)  

Differential measurements in electric field tomography: proof of concept using computer simulation

 

A. V. Korjenevsky, Yu. V. Gulyaev, E. V. Korjenevskaya

Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Mokhovaya 11-7, Moscow 125009, Russia

 

The paper is received on October 16, 2018

 

Abstract. Electric Field Tomography (EFT) is a method of electromagnetic quasistatic tomography enabling contactless obtaining of information about the spatial distribution of the electrical properties of the object under study, probing it with a variable electric field. The problem with the implementation of EFT is the extraction of the useful signal (phase shift) related with Maxwell-Wagner relaxation in the object under study from the total measured change in the phase of the signal. The largest contribution to the measurement error in the unipolar EFT systems proposed earlier is made by the variations in the electrical capacitance of the measuring electrodes and the object under study relative to the common circuit of the system. The objective of this work is to demonstrate the feasibility of EFT system with differential excitation and field detection, which can significantly reduce the effect of such errors and other interference on the measurement results. The method of numerical simulation demonstrates the localization of the sensitivity zone of differential measurements near the equipotential line of the electric field. This makes it possible to use known methods for solving the inverse problem of quasistatic tomography, in particular, the method of convolution and back projection along the lines of maximum sensitivity. It turned out that both phase and amplitude measurements can be used to reconstruct images in the differential EFT.

Keywords: quasistatic electromagnetic tomography, electric field, visualization, finite differences in the time domain.

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For citation:

A. V. Korjenevsky, Yu. V. Gulyaev, E. V. Korjenevskaya. Differential measurements in electric field tomography: proof of concept using computer simulation. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 10. Available at http://jre.cplire.ru/jre/oct18/19/text.pdf
DOI  10.30898/1684-1719.2018.10.19