Image reconstruction algorithm for capacitively coupled electrical resistance tomography

Image reconstruction algorithm for capacitively coupled electrical resistance tomography 1 Introduction</h5> Electrical Resistance Tomography (ERT) can implement the parameter measurement of conductive two-phase flows by providing cross-sectional images and has broad application prospects in many industrial fields, such as petroleum, chemical engineering, environment protection, etc. [1–4] . However, the conventional ERT systems are on the basis of contact conductivity detection technique, the electrodes are directly in contact with the conductive fluid, that may result in electrochemical erosion effect and polarization effect of the electrodes. Meanwhile, unpredictable measurement errors will arise, if the electrodes are contaminated. These drawbacks limit the practical applications of the conventional ERT systems.</P>Capacitively Coupled Contactless Conductivity Detection (C 4 D) was proposed by Zemann et al. [5] and da Silva and do Lago [6] independently in 1998. Its measurement principle is shown in Fig. 1 . A typical C 4 D sensor consists of an insulating pipe, two metal electrodes (an excitation electrode and a detection electrode) placed cylindrically around the outer surface of the insulating pipe, an AC source and an AC current pick-up unit, as shown in Fig. 1 (a). The electrodes, the insulating pipe and the conductive fluid can form two coupling capacitances C 1 and C 2 , and the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Flow Measurement and Instrumentation Elsevier

Image reconstruction algorithm for capacitively coupled electrical resistance tomography

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Publisher
Elsevier
Copyright
Copyright © 2014 Elsevier Ltd
ISSN
0955-5986
eISSN
1873-6998
DOI
10.1016/j.flowmeasinst.2014.07.006
Publisher site
See Article on Publisher Site

Abstract

1 Introduction</h5> Electrical Resistance Tomography (ERT) can implement the parameter measurement of conductive two-phase flows by providing cross-sectional images and has broad application prospects in many industrial fields, such as petroleum, chemical engineering, environment protection, etc. [1–4] . However, the conventional ERT systems are on the basis of contact conductivity detection technique, the electrodes are directly in contact with the conductive fluid, that may result in electrochemical erosion effect and polarization effect of the electrodes. Meanwhile, unpredictable measurement errors will arise, if the electrodes are contaminated. These drawbacks limit the practical applications of the conventional ERT systems.</P>Capacitively Coupled Contactless Conductivity Detection (C 4 D) was proposed by Zemann et al. [5] and da Silva and do Lago [6] independently in 1998. Its measurement principle is shown in Fig. 1 . A typical C 4 D sensor consists of an insulating pipe, two metal electrodes (an excitation electrode and a detection electrode) placed cylindrically around the outer surface of the insulating pipe, an AC source and an AC current pick-up unit, as shown in Fig. 1 (a). The electrodes, the insulating pipe and the conductive fluid can form two coupling capacitances C 1 and C 2 , and the

Journal

Flow Measurement and InstrumentationElsevier

Published: Dec 1, 2014

References

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