Experimental Study of Torque Measurement Based On FBG

Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 246)


This paper discusses a method of torque measurement based on the fiber Bragg grating (FBG) sensor, and introduces the FBG’s application for torque measurement in a rotating shaft with four same planes. With external torsion applied to the shaft, the data obtained by finite element analysis verified the rationality, reliability and strain sensitivity of this design. One end of the shaft is fixed, while the other is connected to a device providing a particular value of torsion with a full scale of 100 Nm. Two parallel gratings FBG1 and FBG2 are bonded on the purposefully machined planes on the shaft symmetrically. Considering the differential-mode wavelength of the dual-grating torsion sensor, the result shows a low temperature sensitivity and a high torsion sensitivity. The sensitivity of the torque measurement system is 14.5 pm/Nm, and has a high linearity and linear correlation.


Torque measurement Fiber Bragg grating Finite element analysis Optical fiber sensors 


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.State Key Laboratory of Precision Measuring Technology and InstrumentsTianjin UniversityTianjinChina

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