A two-dimensional cantilever beam vibration sensor based on fiber Bragg Grating

• Published in: Optical fiber technology Vol. 61; p. 102447
• Main Authors: Jia, Zhen'an, Zhao, Xianfeng, Fan, Wei, Gao, Hong, Liu, Qinpeng, Yong, Zhen, Liu, Yinggang, Yang, Kaiqing
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.01.2021
• Subjects: Cantilever; Fiber Bragg Grating (FBG); Two-dimensional; Vibration sensor; Fiber Bragg Grating (FBG); Vibration sensor; Cantilever; Two-dimensional
• ISSN: 1068-5200; 1095-9912
• DOI: 10.1016/j.yofte.2020.102447

•A two-dimensional cantilever vibration sensor based on Fiber Bragg Grating (FBG) is proposed.•The proposed sensor consists of a section of optical fiber with double FBGs and three different beams.•Compared with the traditional cantilever beam FBG sensor, the proposed sensor has the advantages of multi-directional detection, avoiding chirp and so on. A two-dimensional cantilever vibration sensor based on Fiber Bragg Grating (FBG) is proposed. The proposed sensor consists of a section of optical fiber with double FBGs and three different beams. After theoretical analysis and experimental verification, the proposed sensor has a high sensitivity response. The experimental result shows that the natural frequency of the sensor in the x/y direction of vibrations is respectively 505/177 Hz. The flat frequency of the sensor is 60–150 Hz and 30–150 Hz, respectively. And the sensor’s sensitivity is respectively 125.85/82.32 pm/g in the x/y direction of vibration. Compared with the traditional cantilever beam FBG sensor, the proposed sensor has the advantages of multi-directional detection, avoiding chirp and so on. Therefore, it has great application prospects in two-dimensional vibration signal detection of bridges, roads and buildings.