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International Society for Industrial Process Tomography

6th World Congress on Industrial Process Tomography

Towards Capacitively Coupled Electrical Resistance Tomography


B L Wang, Z Y Huang, H F Ji, H Q Li

Department of Control Science & Engineering, Zhejiang University, Hangzhou, 310027, China blwang@iipc.zju.edu.cn


ABSTRACT


The contact between the electrodes of electrical resistance tomography and liquid may result in electrode corrosion, which limits the application of ERT in industry. This paper proposes a novel ERT system, based on capacitively coupled contactless conductivity detection principle, to solve the problem. In order to test the feasibility of the new system, a simple senor, with working principle similar to the final target system, is built. The impedance between electrodes can be simplified as a series combination of a resistance and a capacitance. A LCR meter is used to measure the capacitance and the resistance at the same time. Test results show that the new system is feasible.


Keywords Capacitively coupled contactless conductivity detection, ERT


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