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Proceedings Paper

High-spatial-resolution temperature monitoring of an industrial motor using a distributed fiber optic sensing technique
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Paper Abstract

We report the use of a fiber-optic distributed sensing system to monitor temperature at a multitude of discrete points on an industrial motor undergoing qualification after a rewinding. This technique involves using optical frequency domain reflectometry to demodulate the reflected signal from multiplexed Bragg gratings that have been photoetched in the core of an optical fiber. In this work, high-resolution optical sensing fiber was applied along the stator windings and end-windings of the motor to assess their suitability for long-term temperature monitoring. Performance tests were conducted at different heat loads representing different electrical conditions. Results indicate excellent agreement with collocated Resistance Temperature Devices (RTDs) and demonstrate significant potential for mitigating costly motor failure due to insulation breakdown resulting from highly localized hotspots.

Paper Details

Date Published: 27 July 2004
PDF: 9 pages
Proc. SPIE 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems, (27 July 2004); doi: 10.1117/12.540130
Show Author Affiliations
Roger G. Duncan, Luna Innovations, Inc. (United States)
Brooks A. Childers, Luna Innovations, Inc. (United States)
Veera Rajendran, GE Corporate Research and Development (United States)

Published in SPIE Proceedings Vol. 5384:
Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems
Eric Udd; Daniele Inaudi, Editor(s)

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