Torsion measurement using fiber bragg grating sensors

X. G. Tian, Xiaoming Tao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

29 Citations (Scopus)


In this paper, the authors study the potential of using fiber Bragg grating (FBG) strain sensors to measure the torsion deformation theoretically and experimentally. FBG sensors are bonded on the surface of a shaft. When the shaft is under torsion, there is strain induced in the FBG sensor and the Bragg wavelength will shift accordingly. According to the wavelength shift and photoelastic properties of the FBG sensor bonded to the shaft, the torsion deformation of the shaft can be obtained. To minimize the measurement error, the optimal direction of the FBG sensor is obtained. The influences of the orientation deviation of the FBG sensor are discussed. The feasibility of this method is demonstrated by experiment, and the test results agree well with the theoretical analysis.
Original languageEnglish
Pages (from-to)248-253
Number of pages6
JournalExperimental Mechanics
Issue number3
Publication statusPublished - 1 Jan 2001


  • Fiber bragg grating
  • Optical fiber
  • Strain
  • Torsion

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering


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