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International Society for Industrial Process Tomography

10th World Congress on Industrial Process Tomography

Spatio-Temporal Data Acquisition in Three-Dimensional Electrical Capacitance Tomography

D. Wanta*, W. T. Smolik, J. Kryszyn, M. Midura, P Wróblewski

Warsaw University of Technology, Faculty of Electronics and Information Technology, Institute of Radioelectronics and Multimedia Technology, Warsaw, Poland



In practical application of electrical capacitance tomography (ECT) usually a 2D data acquisition is used and two-dimensional images are reconstructed. The progress in the development of capacitance measurement circuits and data acquisition systems enables to use three-dimensional sensors in ECT therefore recently a 3D visualization raises interest. The weak point of 3D ECT is its low spatial resolution especially in longitudinal axis of the sensor. A way to improve the spatial resolution may be to take advantage of the temporal similarity between subsequent 3D ECT frames. Spatio-temporal data acquisition increases the number of capacitance measurements therefore the inverse problem is better defined and thus can improve the quality of reconstructed image. In order to verify this approach, an experiment was carried out relying on comparison of volume reconstructed from single 3D measurement to that obtained from spatio-temporal data acquisition. Both the results of the numerical simulation and results based on real measurements are presented.

Keywords: Electrical Capacitance Tomography, Spatio-Temporal Data Acquisition, Landweber iteration algorithm,

Industrial Application: General

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