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Commercial boiler test for distributed temperature sensor based on wavelength-multiplexed sapphire fiber bragg gratings
Author(s): Shuo Yang; Daniel Homa; Hanna Heyl; Logan Theis; John Beach; Billy Dudding; Glen Acord; Dwyn Taylor; Gary Pickrell; Anbo Wang
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Paper Abstract

A distributed sensor based on wavelength-multiplexed sapphire fiber Bragg gratings (FBGs) was designed and fabricated for temperature measurements in commercial boilers under field conditions. Three cascaded FBGs with Bragg wavelengths ranging from 1540 nm to 1570 nm were inscribed in a commercial air-clad single-crystal sapphire fiber, which were packaged inside high purity alumina sheath tubes. The packaged sensor was deployed in a commercial boiler through an existing view port during operation. The tests were performed in a coal-fired boiler, whose temperature varied based on power demands in the local area. The reflected signal from the sensor was simultaneously recorded by an onsite optical interrogation system and converted into temperature information, which was monitored remotely in real time through the Virginia Tech network. The performance of the sensor was consistent during the entire test duration of 42 days, over the course of which it measured temperatures up to 700°C, showing the survivability of the sensing system in a field environment. The system has a demonstrated temperature measurement range from 25°C to 1200°C.

Paper Details

Date Published: 14 May 2019
PDF: 6 pages
Proc. SPIE 11000, Fiber Optic Sensors and Applications XVI, 1100002 (14 May 2019); doi: 10.1117/12.2518315
Show Author Affiliations
Shuo Yang, Virginia Polytechnic Institute and State Univ. (United States)
Daniel Homa, Virginia Polytechnic Institute and State Univ. (United States)
Hanna Heyl, Virginia Polytechnic Institute and State Univ. (United States)
Logan Theis, Virginia Polytechnic Institute and State Univ. (United States)
John Beach, Virginia Polytechnic Institute and State Univ. (United States)
Billy Dudding, Virginia Polytechnic Institute and State Univ. (United States)
Glen Acord, Virginia Polytechnic Institute and State Univ. (United States)
Dwyn Taylor, Virginia Polytechnic Institute and State Univ. (United States)
Gary Pickrell, Virginia Polytechnic Institute and State Univ. (United States)
Anbo Wang, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 11000:
Fiber Optic Sensors and Applications XVI
Robert A. Lieberman; Glen A. Sanders; Ingrid U. Scheel, Editor(s)

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