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Proceedings Paper

Fiber optic strain and temperature sensor for power plant applications
Author(s): Nadarajah Narendran; Joseph M. Weiss
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Paper Abstract

The applicability of fiber-optic strain and temperature sensors to monitor power plant structures was evaluated on a super-heated steam pipe operating at 1000 degree(s)F at the Tennessee Valley Authority power plant in Kingston, Tennessee. The potential applications of these fiber-optic sensors include health monitoring of high-temperature structures such as boilers, tube headers, and steam pipes, as well as many other power plant structures exposed to less severe environments. The sensor selected for this application is based on a white-light interferometric technique. The key features of this sensor include its ability for absolute measurements that are not affected by light loss along the fiber cable due to, for example, microbending effects and coupler loss, its compatibility with off-the-shelf fiber-optic components, and its low cost. The glass fiber-optic strain sensors were packaged in a rugged metal housing and were spot welded to the high-temperature steam pipe. Another set of gages was placed inside a thermowell for steam temperature measurement. Data collected during a routine start-up is very encouraging and the details are presented in this manuscript.

Paper Details

Date Published: 3 January 1996
PDF: 10 pages
Proc. SPIE 2594, Self-Calibrated Intelligent Optical Sensors and Systems, (3 January 1996); doi: 10.1117/12.229225
Show Author Affiliations
Nadarajah Narendran, Mechanical Technology, Inc. (United States)
Joseph M. Weiss, Electric Power Research Institute (United States)

Published in SPIE Proceedings Vol. 2594:
Self-Calibrated Intelligent Optical Sensors and Systems
Anbo Wang, Editor(s)

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