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

Roger G. Duncan; Brooks A. Childers; Veera Rajendran

doi:10.1117/12.540130

27 July 2004 High-spatial-resolution temperature monitoring of an industrial motor using a distributed fiber optic sensing technique

Roger G. Duncan, Brooks A. Childers, Veera Rajendran

Author Affiliations +

Proceedings Volume 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems; (2004) https://doi.org/10.1117/12.540130
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

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.

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Roger G. Duncan, Brooks A. Childers, and Veera Rajendran "High-spatial-resolution temperature monitoring of an industrial motor using a distributed fiber optic sensing technique", Proc. SPIE 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems, (27 July 2004); https://doi.org/10.1117/12.540130

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