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Proceedings Paper

A novel Fiber Bragg grating strain sensor based on rhombus structure at high temperature
Author(s): Xiaoliang Gao; Yueming Liu; Zhongcheng Xia; Zhangcheng Yang
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Paper Abstract

Due to the distinctive merits of FBG, e.g., compact size and immune to electromagnetic, strain sensors based on FBG have attracted an increasing number of attentions in the field of structural health monitoring. But it is not easy to fabricate a strain sensor which can survive at high temperature, because normal material can not stand in a strain creep when the temperature is higher than 200°C. In this paper, a novel strain sensor consisting of a high temperature resistant FBG and a metal rhombus structure is presented and demonstrated for surface strain measurement. The FBG is bonded on the metal structure via a low softening point glass and pre-stretched about 2nm before it is bonded, so it can measure compress and stretch tension. The experimental result shows that the proposed strain sensor can survive at 300°C, and the average wavelength-strain sensitivity for compress and stretch, are 1.821 pm/μepsilon and 1.814 pm/μepsilon , respectively. A more insensitive material to temperature and more appropriate adhesive are needed to improve the linear relationship in the next step.

Paper Details

Date Published: 18 September 2014
PDF: 6 pages
Proc. SPIE 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 92821V (18 September 2014); doi: 10.1117/12.2070656
Show Author Affiliations
Xiaoliang Gao, China Jiliang Univ. (China)
Yueming Liu, China Jiliang Univ. (China)
Zhongcheng Xia, China Jiliang Univ. (China)
Zhangcheng Yang, China Jiliang Univ. (China)


Published in SPIE Proceedings Vol. 9282:
7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Wei Gao, Editor(s)

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