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International Society for Industrial Process Tomography

1st World Congress on Industrial Process Tomography

Electrical Capacitance Tomography with a Square Sensor


W Q Yang*


Department of Electrical Engineering and Electronics, Process Tomography Group, UMIST, P O Box 88, Manchester M60 1QD, UK, email w.yang@umist.ac.uk


S Liu


Institute of Engineering Thermophysics, Chinese Academy of Sciences, P O Box 2706, Beijing 100080, P R China, email shiliu@hotmail.com


Abstract - In the past, electrical capacitance tomography (ECT) with circular sensors has been extensively investigated. For some industrial applications such as circulating fluidised beds, square sensors are required. Research into this specific area has been carried out at UMIST for the first time. To generate sensitivity maps, the Laplace equation is solved using a finite difference method (FDM). Both the linear back-projection (LBP) and an LBP-based iterative algorithm have been implemented for image reconstruction. Experimental results are very promising.


Keywords: Square sensor, Finite difference method, Iterative algorithm, Capacitance tomography


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