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Embedded infrared fiber-optic sensor for thermometry in a high temperature/pressure environment

Authors
Yoo, Wook JaeJang, Kyoung WonMoon, JinsooHan, Ki-TekJeon, DayeongLee, BongsooPark, Byung Gi
Issue Date
Nov-2012
Publisher
한국물리학회
Keywords
Embedded temperature sensor; Fiber-optic sensor; High temperature/pressure environment; Infrared optical fiber; Thermometry
Citation
Journal of the Korean Physical Society, v.61, no.9, pp 1512 - 1517
Pages
6
Journal Title
Journal of the Korean Physical Society
Volume
61
Number
9
Start Page
1512
End Page
1517
URI
https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/14723
DOI
10.3938/jkps.61.1512
ISSN
0374-4884
1976-8524
Abstract
In this study, we developed an embedded infrared fiber-optic temperature sensor for thermometry in high temperature/pressure and water-chemistry environments by using two identical silver-halide optical fibers. The performance of the fabricated temperature sensor was assessed in an autoclave filled with an aqueous coolant solution containing boric acid and lithium hydroxide. We carried out real-time monitoring of the infrared radiation emitted from the signal and reference probes for various temperatures over a temperature range from 95 to 225 A degrees C. In order to decide the temperature of the synthetic coolant solution, we measured the difference between the infrared radiation emitted from the two temperature-sensing probes. Thermometry with the proposed sensor is immune to any changes in the physical conditions and the emissivity of the heat source. From the experimental results, the embedded infrared fiber-optic temperature sensor can withstand, and normally operate in a high temperature/pressure test loop system corresponding to the coolant system used for nuclear power plant simulation. We expect that the proposed sensor can be developed to accurately monitor temperatures in harsh environments.
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