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Sensors 2015, 15(9), 24214-24229; doi:10.3390/s150924214

A Fiber Bragg Grating Sensing Based Triaxial Vibration Sensor

School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China
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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)
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Abstract

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
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

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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