Three-dimensional electrical capacitance tomography measurement system based on an impedance analyzer

2013 ◽  
Author(s):  
Yinggang Zhou ◽  
DeLong Liu ◽  
Hua Yan
Keyword(s):  
Measurement System ◽  
Three Dimensional ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Impedance Analyzer ◽  
Capacitance Tomography

scholarly journals Analysis and Performance Evaluation of Entropic Thresholding Image Processing Techniques for Electrical Capacitance Tomography Measurement System

2021 ◽  
Vol 47 (3) ◽  
pp. 928-942
Author(s):  
Josiah Nombo ◽  
Alfred Mwambela ◽  
Michael Kisngiri
Keyword(s):  
Image Reconstruction ◽  
Measurement System ◽  
Computational Cost ◽  
Quantitative Information ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Industrial Utilization ◽  
And Performance ◽  
Value Decomposition ◽  
Capacitance Tomography

To improve image quality generated from the electrical capacitance tomography measurement system, the use of entropic thresholding techniques is investigated in this article. Based on the analysis of the principle of Electrical Capacitance Tomography (ECT) image reconstruction and entropic thresholding, various algorithms have been proposed for easy extraction of quantitative information from tomograms generated from the ECT system. Experiments indicate that proposed algorithms can provide high-quality images at no or minimum computational cost. It is easier to implement and integrate with classical algorithms such as Linear Back Projection, Singular value decomposition, Tikhonov regularization, and Landweber. Entropic thresholding techniques present a feasible and effective way toward the industrial utilization of ECT measurement systems. Keywords: Electrical Capacitance Tomography; Inverse Problem; Image Reconstruction; Entropic Thresholding

scholarly journals Towards 3D-Electrical Capacitance Tomography for Interface Detection

2016 ◽  
Vol 60 (2) ◽  
pp. 164-175 ◽  
Author(s):  
Peter J. Clark ◽  
Giuseppe Forte ◽  
Mark J. H. Simmons ◽  
E. Hugh Stitt
Keyword(s):  
Binary Systems ◽  
Three Dimensional ◽  
Real Life ◽  
Electrical Capacitance Tomography ◽  
Back Projection ◽  
Electrical Capacitance ◽  
Conductive Material ◽  
Linear Back Projection ◽  
Capacitance Tomography

The application of three-dimensional electrical capacitance tomography (3D-ECT) for the in situ monitoring of a hard boundary or interface has been investigated using imaged phantoms that simulate real-life processes. A cylinder-in-tube phantom manufactured from polyethylene (PE), a low di-electric and non-conductive material, was imaged using the linear back projection (LBP) algorithm with the larger tube immersed at varying intervals to test the ability of the technique to image interfaces axially through the sensor. The interface between PE and air is clearly imaged and correlates to the known tube penetration within the sensor. The cylinder phantom is imaged in the centre of the sensor; however, the reduction in measurement density towards the centre of the ECT sensor results in reduced accuracy. A thresholding method, previously applied to binary systems to improve the imaged accuracy of a hard boundary between two separate phases, has been applied to the 3D-ECT tomograms that represent the PE phantom. This approach has been shown to improve the accuracy of the acquired image of a cylinder of air within a non-conductive PE tube.

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