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Proceedings Paper

Monitoring of inhomogeneous flow distributions using fibre-optic Bragg grating temperature sensor arrays
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Paper Abstract

Knowledge of the gas flow distributions, their mass velocity and turbulences, in chemical reactors, thermodynamic engines, pipes, and other industrial facilities may help to achieve a more efficient system performance. In our novel approach, optical fibre Bragg grating (FBG) sensors have been used for measuring the temperature of a heated element, adapting the principles of conventional hot-wire-anemometers. Because of the multiplexing capability of FBG sensors, the gas mass flow distribution can be measured along the sensor array. The length of the heated and sensor-equipped element can be easily adapted to the cross section of the gas flow, from <10 cm up to several metres. The number and distances of FBGs distributed over this length defines the spatial resolution and is basically limited by the sensor signal processing. According to FBG sensor lengths < 5 mm, spatial resolutions of gas flow measurements of less than 1 cm can be achieved.

Paper Details

Date Published: 22 April 2006
PDF: 8 pages
Proc. SPIE 6189, Optical Sensing II, 61892G (22 April 2006); doi: 10.1117/12.668899
Show Author Affiliations
Ines Latka, Institute for Physical High-Technology (Germany)
Thomas Bosselmann, Siemens AG (Germany)
Wolfgang Ecke, Institute for Physical High-Technology (Germany)
Michael Willsch, Siemens AG (Germany)

Published in SPIE Proceedings Vol. 6189:
Optical Sensing II
Brian Culshaw; Anna G. Mignani; Hartmut Bartelt; Leszek R. Jaroszewicz, Editor(s)

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