Capacitively-coupled impedance measurements for ERT

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The paper explores the potential for using capacitively-coupled electrodes in electrical resistance tomography. Such electrodes are less vulnerable to corrosion and electrochemical effects that plague conventional electrical resistance tomographs utilising electrodes that are in intimate contact with the material. A model is proposed that takes account of the complex impedance of the insulating layer. The performance of the resulting passive network of components has been simulated up to 1 MHz excitation frequency. 2D finite element modelling has been used to explore the measurements that might be expected from electrodes distributed around the boundary of a vessel. Except for the adjacent measurements the modelled impedances are within 1% of those for conventional electrodes.

Bibliographical metadata

Original languageEnglish
Title of host publication6th International Symposium on Process Tomography
Number of pages7
Publication statusPublished - 26 Mar 2012
Event6th International Symposium on Process Tomography - University of Cape Town, Cape Town, South Africa
Event duration: 26 Mar 201226 Apr 2012

Publication series

NameInternational Symposium on Process Tomography


Conference6th International Symposium on Process Tomography
CityUniversity of Cape Town, Cape Town, South Africa