JOURNAL ARTICLE

A study on fiber Bragg grating (FBG) strain sensor based on symmetrical lever structure.

  • Published In: Review of Scientific Instruments, 2023, v. 94, n. 12. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Pang, Weihan; Ma, Chao; Zhao, Lin; Yang, Hainan; Guo, Wenhao; Lu, Mingyu 3 of 3

Abstract

The article focuses on the development and evaluation of a Fiber Bragg Grating (FBG) strain sensor based on a symmetrical lever structure designed to improve the sensitivity of deformation detection in thin-walled structures. The sensor, made from 304 stainless steel, was theoretically analyzed, optimized via SOLIDWORKS and Abaqus simulations, and experimentally tested, demonstrating a strain sensitivity of approximately 6.6 pm/με—about 5.5 times higher than that of bare FBG sensors—with linearity exceeding 99% and a repeatability error of 0.9%. This enhanced sensitivity and stability address the limitations of existing FBG sensors in detecting small strains typical in thin-walled structural components, offering potential for improved structural health monitoring and fault diagnosis in mechanical, aerospace, and civil engineering applications. The study also notes that further improvements, such as temperature compensation, are needed for deployment in complex or high-temperature environments.

Additional Information

  • Source:Review of Scientific Instruments. 2023/12, Vol. 94, Issue 12, p1
  • Document Type:Article
  • Subject Area:Physics
  • Publication Date:2023
  • ISSN:0034-6748
  • DOI:10.1063/5.0167656
  • Accession Number:174561174
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