Sensors 2007, 7(10), 2430-2445; doi:10.3390/s7102430
Planar Array Sensor for High-speed Component Distribution Imaging in Fluid Flow Applications
Forschungszentrum Dresden-Rossendorf e.V., Institute of Safety Research, PO Box 510119, D-01314 Dresden, Germany
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Received: 30 August 2007 / Accepted: 17 October 2007 / Published: 19 October 2007
(This article belongs to the Special Issue Intelligent Sensors)
Abstract
A novel planar array sensor based on electrical conductivity measurements ispresented which may be applied to visualize surface fluid distributions. The sensor ismanufactured using printed-circuit board fabrication technology and comprises of 64 x 64interdigital sensing structures. An associated electronics measures the electricalconductivity of the fluid over each individual sensing structure in a multiplexed manner byapplying a bipolar excitation voltage and by measuring the electrical current flowing from adriver electrode to a sensing electrode. After interrogating all sensing structures, a two-dimensional image of the conductivity distribution over a surface is obtained which in turnrepresents fluid distributions over sensor’s surface. The employed electronics can acquire upto 2500 frames per second thus being able to monitor fast transient phenomena. The systemhas been evaluated regarding measurement accuracy and depth sensitivity. Furthermore, theapplication of the sensor in the investigation of two different flow applications is presented.Keywords:
planar sensor; interdigital electrode; flow imaging; multiphase flow; multicomponent flow; phase distribution.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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MDPI and ACS Style
Da Silva, M.J.; Sühnel, T.; Schleicher, E.; Vaibar, R.; Lucas, D.; Hampel, U. Planar Array Sensor for High-speed Component Distribution Imaging in Fluid Flow Applications. Sensors 2007, 7, 2430-2445.