scholarly journals A Finite Volume Method using a Quadtree Non-Uniform Structured Mesh for Modeling in Electrical Capacitance Tomography

2021 ◽  
Author(s):  
Damian Wanta ◽  
Waldemar Tomasz Smolik ◽  
Jacek Kryszyn ◽  
Przemysław Wróblewski ◽  
Mateusz Midura
Keyword(s):  
Finite Volume Method ◽  
Finite Volume ◽  
High Speed ◽  
Mesh Refinement ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Assess Quality ◽  
Volume Method ◽  
Capacitance Tomography

AbstractAn electric field solver based on a finite volume method using refined structural mesh is proposed to implement a quadtree structure and estimate the electric flux in the mesh cell. Numerical experiments were carried out using uniform and non-uniform meshes to assess quality of numerical modeling. The proposed method of verification of the quality of numerical calculations based on circular symmetry of the electrical capacitance tomography (ECT) probe allows to assess the effectiveness of mesh refinement and to reduce the number of mesh elements. Experiments showed that even a moderate level of mesh refinement is sufficient to significantly reduce the simulation error that occurs in modeling of cylindrical probes. The reduced number of mesh elements and applied implementation of the quadtree ensures high speed of forward problem calculations.

scholarly journals Application of Electrical Capacitance Tomography for Imaging Conductive Materials in Industrial Processes

2019 ◽  
Vol 2019 ◽  
pp. 1-22 ◽  
Author(s):  
Wael Deabes ◽  
Alaa Sheta ◽  
Kheir Eddine Bouazza ◽  
Mohamed Abdelrahman
Keyword(s):  
Industrial Processes ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Reconstruction Algorithms ◽  
Field Problem ◽  
Conductive Materials ◽  
Image Reconstruction Algorithms ◽  
Capacitance Tomography ◽  
Lost Foam

This paper presents highly robust, novel approaches to solving the forward and inverse problems of an Electrical Capacitance Tomography (ECT) system for imaging conductive materials. ECT is one of the standard tomography techniques for industrial imaging. An ECT technique is nonintrusive and rapid and requires a low burden cost. However, the ECT system still suffers from a soft-field problem which adversely affects the quality of the reconstructed images. Although many image reconstruction algorithms have been developed, still the generated images are inaccurate and poor. In this work, the Capacitance Artificial Neural Network (CANN) system is presented as a solver for the forward problem to calculate the estimated capacitance measurements. Moreover, the Metal Filled Fuzzy System (MFFS) is proposed as a solver for the inverse problem to construct the metal images. To assess the proposed approaches, we conducted extensive experiments on image metal distributions in the lost foam casting (LFC) process to light the reliability of the system and its efficiency. The experimental results showed that the system is sensible and superior.

scholarly journals A freestream-preserving fourth-order finite-volume method in mapped coordinates with adaptive-mesh refinement

2015 ◽  
Vol 123 ◽  
pp. 202-217 ◽  
Author(s):  
Stephen M. Guzik ◽  
Xinfeng Gao ◽  
Landon D. Owen ◽  
Peter McCorquodale ◽  
Phillip Colella
Keyword(s):  
Finite Volume Method ◽  
Finite Volume ◽  
Fourth Order ◽  
Adaptive Mesh Refinement ◽  
Mesh Refinement ◽  
Adaptive Mesh ◽  
Volume Method

A New Improved Data Acquisition System for Electrical Capacitance Tomography

2013 ◽  
Vol 756-759 ◽  
pp. 1527-1531
Author(s):  
Hui Zhang ◽  
Dan Ren ◽  
Li Ming Du
Keyword(s):  
Data Acquisition ◽  
Digital Signal Processor ◽  
High Speed ◽  
Phase Error ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Logic Device ◽  
Capacitance Tomography

To improve the precision and speed of the system, a new 16-electrode electrical capacitance tomography (ECT) system based on DSP was designed. The measure system adopts 16 electrodes combined and floating capacitance sensor array, and with the phase located loop circuit to eliminate ECT systems additional phase error. The digital signal processor (DSP) is the core of data acquisition system, the computing and control unit includes a DSP (TMS320C5416) and a complex programmable logic device (CPLD). The communication module of the designed system is developed based on HPI parallel transmission technology, which can implement high-speed communication between ECT system and PC. Simulation results show that the sensitivity distribution was more uniform and the reconstructed images for objects were improved obviously by using 16-combined and floating electrodes sensor.

Sign in / Sign up

Export Citation Format

Share Document