Yulu Xu, Yi Ni, Tao Yu, Yu Guo. Fiber Bragg Grating Displacement Sensor Based on Beat Frequency Demodulation[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170622
- Laser & Optoelectronics Progress
- Vol. 56, Issue 17, 170622 (2019)
Fig. 1. Experimental setup diagram of ring FBG displacement sensor
Fig. 2. Structural diagram of strain gauge
Fig. 3. Beat frequency generation theory
Fig. 4. Spectra of sensor. (a) Beat signal of spectrometer output; (b) beat signal of adjacent longitudinal modes
Fig. 5. Drift spectrum diagram of beat frequency signal under different displacements
Fig. 6. Relationship between beat frequency and strain gauge displacement of adjacent longitudinal modes
Fig. 7. Measured result of sensor stability
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20