Electromagnetic Characteristic of Sensitive Field on Compare Electrical Capacitance Tomography with Electrical Resistance Tomography

2014 ◽  
Vol 543-547 ◽  
pp. 697-700
Author(s):  
Qing Yu Gan ◽  
Li Ping Su
Keyword(s):  
Finite Element ◽  
Electrical Resistance ◽  
Electrical Capacitance Tomography ◽  
Compound System ◽  
Electrical Capacitance ◽  
Electrical Resistance Tomography ◽  
Math Model ◽  
Electromagnetic Characteristic ◽  
Electromagnetic Characteristics ◽  
Capacitance Tomography

The electromagnetic characteristic of sensitive field of Electrical Capacitance Tomography (ECT) was compared with that of Electrical Resistance Tomography (ERT) applying Finite Element Method.The math model of ECT and ERT were deduced respectively, then their electromagnetic characteristics of sensitive field and their relationship were evaluated using finite element method, which laid the foundation of theory for information fusion in ECT&ERT-compound system.

scholarly journals Electrical Capacitance Tomography (ECT) Electrode Size Simulation Study for Cultured Cell

2021 ◽  
Vol 2071 (1) ◽  
pp. 012052
Author(s):  
N A Zulkiflli ◽  
M D Shahrulnizahani ◽  
X F Hor ◽  
F A Phang ◽  
M F Rahmat ◽  
...  
Keyword(s):  
Finite Element ◽  
Cultured Cells ◽  
Electrical Capacitance Tomography ◽  
Finite Element Models ◽  
Capacitive Sensing ◽  
Electrical Capacitance ◽  
Cross Sectional ◽  
Electrode Size ◽  
Cell Monitoring ◽  
Capacitance Tomography

Abstract Cell sensing and monitoring using capacitive sensors are widely used in cell monitoring because of the flexible and uncomplicated design and fabrication. Previous work from many different fields of applications has integrated capacitive sensing technique with tomography to produce cross-sectional images of the internal dielectric distribution. This paper carried an investigation on the capabilities of four 16-channel sensor electrodes with different electrode sizes to detect the change in the dielectric distribution of the cultured cells. All three 16-channel sensor electrodes are designed and simulate on COMSOL 6.3a Multiphysics. The pre-processing results obtained from three finite element models (FEM) of ECT sensor configurations in detecting the cell phantom shows that bigger electrodes size are more sensitive to permittivity distribution.

Sensor Modeling For An Electrical Capacitance Tomography System Using Comsol Multiphysics

2012 ◽  
Author(s):  
Muhammad Afiq Zimam ◽  
Elmy Johana Mohamad ◽  
Ruzairi Abdul Rahim ◽  
Leow Pei Ling
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Comsol Multiphysics ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Tomography System ◽  
Physical Sensors ◽  
Capacitance Tomography ◽  
Sensor Modeling ◽  
Element Method

Kerja penyelidikan ini membentangkan proses pembinaan model bagi Pengesan Kapasitan Elektrik Tomografi (ECT) menggunakan Perisian Kaedah Elemen Terhingga (Finite Element method–FEM) COMSOL Multiphysics. Meskipun pengesan fizikal adalah dalam bentuk tiga dimensi (3D) tetapi secara amnya sering dimodelkan secara kepingan/ keratan rentas dalam bentuk dua dimensi (2D). Projek ini menunjukkan pendekatan model dalam bentuk geometri 3D dan 2D, linear FEM menggunakan perisian COMSOL Multiphysics dibina adalah untuk mendapatkan nilai kapasitor di antara elektrod apabila medan elektrik dikenakan dan untuk melihat bagaimana pengagihan permittivity di dalam paip yang bertutup menerusi pengesan. Bayang–bayang yang direkacipta dan nilai–nilai diukur dikemukakan dalam bentuk paip yg kosong dan aliran anulus. Model ECT adalah mewakili perkakasan yang sedia ada, ECT mudah alih yang telah dibina oleh Kumpulan Penyelidikan PROTOM UTM. Kata kunci: Pengesan; model; ECT; COMSOL multiphysics This work presents the development process for modeling an ECT (Electrical Capacitance Tomography) sensor using FEM software package COMSOL Multiphysics. The physical sensors are 3D dimensional but it has been common to model the slice or the cross–section in 2D. This project shows the modeling approach for 2D and 3D geometries, the linear Finite Element method (FEM) using COMSOL Multiphysics is developed in order to obtain the capacitance between electrodes when an electric field is applied and to obtain the permittivity distribution inside the closed pipe from the sensor. Generated phantoms and measured values are presented for empty and annular pattern. Simulation is verified using phantoms inside the 16 electrode sensor. The ECT model is representative by existing hardware, Portable ECT, PROTOM Research Group UTM. Key words: Sensor; modeling; ECT; COMSOL multiphysics

FINITE ELEMENT ANALYSIS ON ELECTRICAL CAPACITANCE SENSOR GUARD

2015 ◽  
Vol 77 (28) ◽  
Author(s):  
Jaysuman Pusppanathan ◽  
Ruzairi Abdul Rahim ◽  
Fatin Aliah Phang ◽  
Fazlul Rahman Mohd Yunus ◽  
Nor Muzakkir Nor Ayob ◽  
...  
Keyword(s):  
Finite Element ◽  
Copper Plate ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Capacitance Sensor ◽  
Element Analysis ◽  
Numerical Studies ◽  
Capacitance Tomography ◽  
Conventional Type ◽  
Lower Noise

Electrical Capacitance Tomography (ECT) is widely used for multiphase flow measuring and monitoring purposes. In this paper, a customized sensor electrode is introduced for ECT system. This sensor has an embedded guard using flexible FR4 copper plate which makes it advantage over the conventional type of design in terms of smaller in size, easy to attach on pipe circumference and has lower noise. To investigate the behaviour of the sensor guard, a Finite Element Method (FEM) using COMSOL Multiphysics software comes necessary. An emulated experiment is carried out to solve the sophisticated numerical studies to model the customized ECT sensor and its embedded noise guards.

Application of GPU Parallel Computing for Acceleration of Finite Element Method Based 3D Reconstruction Algorithms in Electrical Capacitance Tomography

2012 ◽  
Vol 17 (4) ◽  
pp. 339-346 ◽  
Author(s):  
Paweł Kapusta ◽  
Michał Majchrowicz ◽  
Dominik Sankowski ◽  
Robert Banasiak
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Parallel Computing ◽  
Graphics Processing Units ◽  
Sparse Matrices ◽  
Electrical Capacitance Tomography ◽  
Electrical Capacitance ◽  
Reconstruction Algorithms ◽  
Capacitance Tomography ◽  
Element Method

Abstract With the increasing complexity and scale of industrial processes their visualization is becoming increasingly important. Especially popular are non-invasive methods, which do not interfere directly with the process. One of them is the 3D Electrical Capacitance Tomography. It possesses however a serious flaw - in order to obtain a fast and accurate visualization requires application of computationally intensive algorithms. Especially non-linear reconstruction using Finite Element Method is a multistage, complex numerical task, requiring many linear algebra transformations on very large data sets. Such process, using traditional CPUs can take, depending on the used meshes, up to several hours. Consequently it is necessary to develop new solutions utilizing GPGPU (General Purpose Computations on Graphics Processing Units) techniques to accelerate the reconstruction algorithm. With the developed hybrid parallel computing architecture, based on sparse matrices, it is possible to perform tomographic calculations much faster using GPU and CPU simultaneously, both with Nvidia CUDA and OpenCL.

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