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International Society for Industrial Process Tomography

7th World Congress on Industrial Process Tomography

Optimisation of an Analogue Signal Conditioning Circuit for a Novel Imaging Electromagnetic Flow meter

M. Ali, G. Lucas

Systems Engineering Research Group, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK


Abstract


This paper describes the optimisation of a signal conditioning circuit for use in a novel imaging electromagnetic flow meter. Voltages are induced on the boundary of the fluid flowing through the flow meter by its interaction with an AC magnetic field. The induced voltages are detected by an array of electrodes and measured by a multi- channel system, based on the signal conditioning circuit described in this paper. The original signal conditioning circuit had several drawbacks. It occasionally exceeded its operational dynamic range, had a very long settling time and a steady-state error. These drawbacks were overcome in the optimised design.


Keywords: multi-electrode electromagnetic flow meter; induced voltage;signal conditioning

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