Experimental Mechanics

, Volume 41, Issue 3, pp 248–253 | Cite as

Torsion measurement using fiber Bragg grating sensors

  • X. G. Tian
  • X. M. Tao


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.

Key Words

Optical fiber fiber Bragg grating torsion strain 


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Copyright information

© Society for Experimental Mechanics, Inc. 2001

Authors and Affiliations

  • X. G. Tian
    • 1
  • X. M. Tao
    • 2
  1. 1.Xian Jiaotong UniversityChina
  2. 2.Institute of Textiles and ClothingHong Kong Polytechnic UniversityKowloonHong Kong

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