A novel Fiber Bragg grating strain sensor based on rhombus structure at high temperature

Xiaoliang Gao; Yueming Liu; Zhongcheng Xia; Zhangcheng Yang

doi:10.1117/12.2070656

18 September 2014 A novel Fiber Bragg grating strain sensor based on rhombus structure at high temperature

Xiaoliang Gao, Yueming Liu, Zhongcheng Xia, Zhangcheng Yang

Proceedings Volume 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 92821V (2014) https://doi.org/10.1117/12.2070656
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

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.

Citation Download Citation

Xiaoliang Gao, Yueming Liu, Zhongcheng Xia, and Zhangcheng Yang "A novel Fiber Bragg grating strain sensor based on rhombus structure at high temperature", Proc. SPIE 9282, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 92821V (18 September 2014); https://doi.org/10.1117/12.2070656

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KEYWORDS

Fiber Bragg gratings

Sensors

Temperature metrology

Metals

Glasses

Optical fabrication

Coating

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