The UCT electrical resistance tomography instrument and its applications

Mr. E. W. Randall Chemical Engineering University of Cape Town, South Africa


17 September 2009 at 10:30

Location: JHE 326H

Electrical Resistance Tomography (ERT) is a non-invasive technique for measuring the conductivity distribution in a vessel. It has application in determining performance of many industrial mixing systems such as chemical reactors, slurry pipe-lines, and flotation columns used in minerals processing. An ERT system has been developed at the University of Cape Town (UCT) which employs a novel current pulse measuring technique. The electronics is simpler to implement than the conventional AC excited systems and is capable of high speed operation enabling dynamic systems to be investigated. Capture rates of up to 1000 frames/second have been achieved. Performance is similar to that achieved by other systems reported in the literature. The C++ program which controls the system provides real-time visualization and can record data for off-line analysis by the EIDORS open source software or user written code.

This presentation provides a brief overview of electrical tomography and describes the operation of the UCT instrument. Typical results are presented which illustrate the capabilities and applications of the system.


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