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Journal of Electronic Imaging

Sensitivity analysis of different sensing strategies for electrical impedance imaging of two-phase flows
Author(s): T. P. Figueroa; Paulo Seleghim
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Paper Abstract

Due to practical considerations, electrical fields and other soft field sensing techniques are convenient to use in process tomography applications. However, most of the reconstruction algorithms were first developed for hard sensing fields that approximate soft fields only in the situation of low electrical contrast. A less restrictive reconstruction method can be developed by refining the qualitative images of a direct imaging probe, but the boundary measurements must be sensitive to changes in the distribution of the electrical properties of the flow. This paper addresses the issue and presents a sensitivity analysis of different excitation strategies and their applicability in a reconstruction algorithm such as described above. Results confirm that classical excitation strategies suffer from a major lack of sensitivity and that new ones must be developed, possibly based on the optimization of the excitation profiles or on multisensing techniques.

Paper Details

Date Published: 1 July 2001
PDF: 5 pages
J. Electron. Imaging. 10(3) doi: 10.1117/1.1380201
Published in: Journal of Electronic Imaging Volume 10, Issue 3
Show Author Affiliations
T. P. Figueroa, Univ. de Sao Paulo (Brazil)
Paulo Seleghim, Univ. de Sao Paulo (Brazil)

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