中国物理B ›› 2023, Vol. 32 ›› Issue (11): 114201-114201.doi: 10.1088/1674-1056/acec43
所属专题: SPECIAL TOPIC — Celebrating the 100th Anniversary of Physics Discipline of Northwest University
Wenyu Hu(胡文玉)1,2, Zhuo Chen(陈卓)1,2, Jiangshan You(尤江山)1,2, Ruohui Wang(王若晖)1,2, Rui Zhou(周锐)1,2,†, and Xueguang Qiao(乔学光)1,2,‡
Wenyu Hu(胡文玉)1,2, Zhuo Chen(陈卓)1,2, Jiangshan You(尤江山)1,2, Ruohui Wang(王若晖)1,2, Rui Zhou(周锐)1,2,†, and Xueguang Qiao(乔学光)1,2,‡
摘要: Vector accelerometer has attracted much attention for its great application potential in underground seismic signal measurement. We propose and demonstrate a novel vector accelerometer based on the three fiber Bragg gratings (FBGs) embedded in a silicone rubber compliant cylinder at 120° distributed uniformly. The accelerometer is capable of detecting the orientation of vibration with a range of 0°-360° and the acceleration through monitoring the central wavelength shifts of three FBGs simultaneously. The experimental results show that the natural frequency of the accelerometer is about 85 Hz, and the sensitivity is 84.21 pm/g in the flat range of m 20 Hz-60 Hz. Through experimental calibration, the designed accelerometer can accurately obtain vibration vector information, including vibration orientation and acceleration. In addition, the range of resonant frequency and sensitivity can be expanded by adjusting the hardness of the silicone rubber materials. Due to the characteristics of small size and orientation recognition, the accelerometer can be applied to low-frequency vibration acceleration vector measurement in narrow spaces.
中图分类号: (Fiber optics)