title: A Fiber Bragg Grating Sensing Based Triaxial Vibration Sensor.
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.
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China. tianliangliwhut@sina.com.
authors.forename: Tianliang
authors.initials: T
authors.lastname: Li
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China. ygtan@whut.edu.cn.
authors.forename: Yuegang
authors.initials: Y
authors.lastname: Tan
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China. wgdliuyi2001@126.com.
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China. quyongzhi@163.com.
authors.forename: Yongzhi
authors.initials: Y
authors.lastname: Qu
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China. lmylyf@126.com.
authors.forename: Mingyao
authors.initials: M
authors.lastname: Liu
authors.affiliation: School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan 430070, China. zudezhou@whut.edu.cn.
authors.forename: Zude
authors.initials: Z
authors.lastname: Zhou
keywords: fiber Bragg grating; triaxial; vibration sensor