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Arts of electrical impedance tomographic sensing
Mi Wang1, Qiang Wang2, Bishal Karki2
1School of Chemical and Process Engineering, University of Leeds, Leeds, West Yorkshire LS2 9JT, UK m.wang@leeds.ac.uk.
Summary
Electrical impedance sensing advancements enable deriving new strategies from existing data. Adjacent electrode pair sensing shows superior performance for regional imaging and two-phase flow monitoring.
Area of Science:
- Electrical impedance sensing
- Industrial process tomography
Background:
- Governing theorems in electrical impedance sensing are reviewed.
- Relationships between boundary voltages from different sensing strategies are analyzed.
Purpose of the Study:
- To derive alternative sensing strategies from existing measurements.
- To introduce a new regional imaging method with limited measurements.
- To evaluate the applicability of the sensitivity coefficient back-projection algorithm.
Main Methods:
- Analysis of boundary voltage relationships and sensitivity matrices.
- Development of a new sensing method for regional imaging.
- Verification of imaging capabilities with static setups.
- Demonstration of electrical impedance tomography for gas-in-water flows.
Main Results:
- Alternative sensing strategies can be derived from existing data.
- The sensitivity coefficient back-projection algorithm's limitations are identified.
- Adjacent electrode pair sensing outperforms diametrically opposite sensing.
- Electrical impedance tomography is effective for two-phase flow sensing.
Conclusions:
- New electrical impedance sensing strategies can be developed.
- Sensing strategy selection impacts imaging performance.
- Electrical impedance tomography has practical applications in industrial processes.
