Modelling of capacitance tomography sensors

Research output: Contribution to journalArticlepeer-review

Abstract

Current electrical capacitance tomography (ECT) systems reconstruct cross-sectional images directly using the 'raw' capacitance data measured from the multielectrode sensors. These 'raw' measurements are affected by the pipe wall and/or external interelectrode capacitances, and hence it is impossible to reconstruct accurate quantitative images. The author analyses four types of pipe-mounted sensor, as categorised by their electrode and radial screen arrangements, and gives methods of calculating the internal interelectrode capacitances which exclude other interfering capacitances, thus enabling quantitative measurements and improved images to be obtained.
Original languageEnglish
Pages (from-to)203-208
Number of pages6
JournalIEE Proceedings: Science, Measurement and Technology
Volume144
Issue number5
DOIs
Publication statusPublished - 1997

Keywords

  • Capacitance measurement
  • Process tomography
  • Sensor modelling

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