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http://dx.doi.org/10.3795/KSME-A.2013.37.8.999

Characteristics of Thermal Coefficient of Fiber Bragg Grating for Temperature Measurement  

Kim, Heon-Young (Dep. of Mechanical Engineering, Seoul Nat'l Univ. of Science and Technology)
Kang, Donghoon (Korea Railroad Research Institute)
Lee, Jin-Hyuk (Graduate School of Energy and Environment, Seoul Nat'l Univ. of Science and Technology)
Kim, Dae-Hyun (Dep. of Mechanical and Automotive Engineering, Seoul Nat'l Univ. of Science and Technology)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.8, 2013 , pp. 999-1005 More about this Journal
Abstract
A fiber Bragg grating sensor is considered a smart sensor that shows outstanding performance in the field of structural health monitoring (SHM). It has a powerful advantage, especially that of multiplexing, which enables several parameters to be sensed at multiple points by using a single optical fiber line. Among several parameters, the thermal expansion coefficient and thermo-optic coefficient are required to measure temperature. In previous studies, these were considered constant variables. This study shows that two parameters vary with temperature and newly proposes a temperature function for these two parameters. Specifically, these two parameters were defined as a single variable, and then, it was experimentally verified that this variable is a function of temperature. Finally, it was shown that temperature from RT to $100^{\circ}C$ was precisely measured by using the temperature function that was defined through the experiment.
Keywords
Fiber Optic Sensor; Fiber Bragg Grating; Thermal Coefficient; Structure Health Monitoring;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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