
Proceedings Paper
Temperature insensitive measurements of displacement using fiber Bragg grating sensorsFormat | Member Price | Non-Member Price |
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Paper Abstract
Optical fiber Bragg grating (FBG) displacement sensors play an important role in various areas due to the high
sensitivity to displacement. However, it becomes a serious problem of FBG cross-sensitivity of temperature and
displacement in applications with FBG displacement sensing. This paper presents a method of temperature insensitive
measurement of displacement via using an appropriate layout of the sensor. A displacement sensor is constructed with
two FBGs mounted on the opposite surface of a cantilever beam. The wavelengths of the FBGs shift with a horizontal
direction displacement acting on the cantilever beam. Displacement measurement can be achieved by demodulating the
wavelengths difference of the two FBGs. In this case, the difference of the two FBGs’ wavelengths can be taken in order
to compensate for the temperature effects. Four cantilever beams with different shapes are designed and the FBG strain
distribution is quite different from each other. The deformation and strain distribution of cantilever beams are simulated
by using finite element analysis, which is used to optimize the layout of the FBG displacement sensor. Experimental
results show that an obvious increase in the sensitivity of this change on the displacement is obtained while temperature
dependence greatly reduced. A change in the wavelength can be found with the increase of displacement from 0 to
10mm for a cantilever beam. The physical size of the FBG displacement sensor head can be adjusted to meet the need of
different applications, such as structure health monitoring, smart material sensing, aerospace, etc.
Paper Details
Date Published: 4 November 2016
PDF: 7 pages
Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 1002504 (4 November 2016); doi: 10.1117/12.2246299
Published in SPIE Proceedings Vol. 10025:
Advanced Sensor Systems and Applications VII
Tiegen Liu; Shibin Jiang; Rene Landgraf, Editor(s)
PDF: 7 pages
Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 1002504 (4 November 2016); doi: 10.1117/12.2246299
Show Author Affiliations
Shuang Yang, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Jun Li, Anhui Institute of Optics and Fine Mechanics (China)
Shengming Xu, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Miao Sun, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Univ. of Science and Technology of China (China)
Jun Li, Anhui Institute of Optics and Fine Mechanics (China)
Shengming Xu, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Miao Sun, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Yuquan Tang, Anhui Institute of Optics and Fine Mechanics (China)
Gang Gao, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Fengzhong Dong, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Gang Gao, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Fengzhong Dong, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Published in SPIE Proceedings Vol. 10025:
Advanced Sensor Systems and Applications VII
Tiegen Liu; Shibin Jiang; Rene Landgraf, Editor(s)
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