Evaluation of fringe effect of electrical resistance tomography sensor |
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| Affiliation: | 1. Department of Mechanical Engineering, Sri Sai Ram Institute of Technology, Sai Leo Nagar, West Tambaram, Chennai 600 044, India;2. Research Scholar, Sathyabama University, Chennai 600 119, India;1. School of Electronic and Information Engineering, Soochow University, Suzhou 215006, China;2. Center of Intelligent Acoustics and Immersive Communications, School of Marine Science and Technology, Northwestern Polytechnical University, Xi''an 710072, China;1. Université Mohamed Seddik Ben Yahia, Jijel, Algeria;2. Laboratoire de Mécanique Appliquée des Nouveaux Matériaux (LMANM), Université 8 Mai 1945, Guelma, Algeria;3. Advanced Composites Centre for Innovation and Science (ACCIS), University of Bristol, BS8 1TR Bristol, UK;1. Applied Geotechnology Group, Department of Natural Resources and Environmental Engineering, School of Mining Engineering, University of Vigo, 36310 Vigo, Spain;2. Applied Geotechnology Group, Department of Materials Engineering, Applied Mechanics and Construction, School of Industrial Engineering, University of Vigo, 36310 Vigo, Spain |
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| Abstract: | A conventional electrical resistance tomography (ERT) sensor uses pin electrodes for current injection, and the electric field spreads far beyond the electrode plane, as a result of “soft field” nature. This phenomenon is referred to as “fringe effect” and would cause measurement errors and image distortion. The impact of fringe effect on measurement and reconstructed images depends on the object distributions, the conductivity contrast and others. It is not trivial to evaluate the fringe effect of an ERT sensor and its impact on the measurement and the reconstructed images. In this paper the fringe effect of an ERT sensor is evaluated for central core and off-central core distributions at different axial positions and with different axial dimensions and conductivity contrasts. Then, how to compensate for the fringe effect of the ERT sensor is discussed and a method proposed for improving the measurement accuracy and image reconstruction. Finally, the findings and methodology is verified by experiment. |
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| Keywords: | Electrical resistance tomography"} {"#name":"keyword" "$":{"id":"k0010"} "$$":[{"#name":"text" "_":"Tomography sensor Fringe effect |
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