Tomography is a technique used to produce true reconstructed
images from signal data. This data projection is measured capacitance by
numerous sensors located on the surface of the object at different position.
Sensitivity matrix with three-dimensional variation, especially in axial
(z-axiz) direction are required for imaging a three-dimensional object to
differentiate the depth along the sensor length so that the electrical field
intensity can be distributed equally all over the three dimension space. In ECVT,
when a dielectric material is introduced into the vessel, the variation in the
electrical capacitance between all possible combinations of electrodes are
measured. These changes are caused by diference in the permittivity of that
material. From these capacitance measurements, an image based on the variation
of the permittivity of the cross section contents can be obtained. In this
study a numerical model using combine COMSOL MULTIPHYSICS v3.5 and MATLAB 2008a
for imaging of an object was developed. Three different position of rectangular
sensor: 1-sided sensor, 3sided and U-shape sensor was designed and analyzed.
1-sided sensor displayed comparatively more uniform in both radial and axial
direction in the comparisons of sensitivity distribution.
Author(s) Details Irfana Kabir Ahmad
Department of Civil Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, Bangi, Selangor, Malaysia.
Muhammad Mukhlisin
Department of Civil Engineering, Polytechnic Negeri Semarang, Indonesia.
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