Strain-insensitive Fiber Bragg Grating Composite Structure for Wide-range Temperature Sensing

Pingyu Zhu; Tingyu Huang; Sheng Fan; Yukun Yan; Bo Peng; Danli Xiong; Shuai Zhang; Marcelo A. Soto

doi:10.37965/jdmd.2024.587

Authors

Pingyu Zhu School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, China https://orcid.org/0000-0001-6338-0109
Tingyu Huang School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, China https://orcid.org/0009-0007-1548-8749
Sheng Fan Zhuzhou Times New Material Technology Co., LtD., Zhuzhou, China
Yukun Yan Zhuzhou Times New Material Technology Co., LtD., Zhuzhou, China
Bo Peng Zhuzhou Times New Material Technology Co., LtD., Zhuzhou, China
Danli Xiong School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, China
Shuai Zhang School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, China
Marcelo A. Soto Department of Electronics Engineering, Universidad Técnica Federico Santa María, Valparaíso, Chile https://orcid.org/0000-0002-2140-2012

DOI:

https://doi.org/10.37965/jdmd.2024.587

Keywords:

Fiber Bragg grating, composite structure, temperature sensing

Abstract

This paper reports on the design, fabrication, and temperature strain sensing performance of a fiber Bragg grating composite structure for surface mounted temperature measurements over a wide temperature range, with highly reduced strain cross-sensitivity. The fiber Bragg grating sensor is encapsulated in a polyimide tube filled with epoxy resin, forming an arc-shaped cavity. This assembly is then placed between two layers of glass fiber prepreg with a flexible pad in between and cured into shape. Experimental results, supported by finite element simulations, demonstrate an enhanced temperature sensitivity is 26.3 pm/ºC over a wide temperature range of -30℃ to 70℃, and high strain transfer isolation of about 99.65%.

Conflict of Interest Statement

The authors declare no conflicts of interest.