A Non-contact Fiber Bragg Grating Vibration Sensor
A non-contact vibration sensor based on fiber Bragg grating(FBG) sensing has been proposed and studied in this paper.The principle of the sensor as well as simulation and experimental analyses are introduced.When the distance between the movable head and the measured shaft changed, the diaphragm deformed under magnetic coupling of the permanent magnet on the measured magnetic shaft.As a result, the center wavelength of the FBG connected to the diaphragm changed, based on which the vibration displacement of the rotating shaft could be obtained.Experimental results show that the resonant frequency of the sensor is about 1500HZ and the working band ranges within 0~1300HZ, which is consistent with the simulation analysis result;the sensitivity is-1.694pm/um and the linearity is 2.92% within a range of 2-2.4mm.It can be used to conduct non-contact measurement on the vibration of the rotateng shaft system.
FBG non-contact vibration sensor circular diaphragm
Tianliang Li Yuegang Tan Li Wei Zude Zhou Kai Zheng Yongxing Guo
School of Mechanical and Electronic Engineering, Wuhan University of Technology,Wuhan, Hubei, China National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology,
国内会议
广州
英文
85-94
2015-05-01（万方平台首次上网日期，不代表论文的发表时间）