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Sensors 2015, 15(9), 24214-24229;

A Fiber Bragg Grating Sensing Based Triaxial Vibration Sensor

School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
Author to whom correspondence should be addressed.
Academic Editor: Francesco de Leonardis
Received: 17 July 2015 / Revised: 15 September 2015 / Accepted: 16 September 2015 / Published: 18 September 2015
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [3384 KB, uploaded 18 September 2015]   |  


A fiber Bragg grating (FBG) sensing based triaxial vibration sensor has been presented in this paper. The optical fiber is directly employed as elastomer, and the triaxial vibration of a measured body can be obtained by two pairs of FBGs. A model of a triaxial vibration sensor as well as decoupling principles of triaxial vibration and experimental analyses are proposed. Experimental results show that: sensitivities of 86.9 pm/g, 971.8 pm/g and 154.7 pm/g for each orthogonal sensitive direction with linearity are separately 3.64%, 1.50% and 3.01%. The flat frequency ranges reside in 20–200 Hz, 3–20 Hz and 4–50 Hz, respectively; in addition, the resonant frequencies are separately 700 Hz, 40 Hz and 110 Hz in the x/y/z direction. When the sensor is excited in a single direction vibration, the outputs of sensor in the other two directions are consistent with the outputs in the non-working state. Therefore, it is effectively demonstrated that it can be used for three-dimensional vibration measurement. View Full-Text
Keywords: fiber Bragg grating; triaxial; vibration sensor fiber Bragg grating; triaxial; vibration sensor

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Li, T.; Tan, Y.; Liu, Y.; Qu, Y.; Liu, M.; Zhou, Z. A Fiber Bragg Grating Sensing Based Triaxial Vibration Sensor. Sensors 2015, 15, 24214-24229.

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