An FBG Vibration Sensor Tailored for Monitoring Ultralow-Frequency Vibration Signals

被引：1

作者：

Zhang, Bingbing ^{[1
]}

Ning, Tigang ^{[1
]}

Pei, Li ^{[1
]}

Teng, Yuntian ^{[2
]}

Liu, Shengchun ^{[3
]}

机构：

[1] Beijing Jiaotong Univ, Sch Elect & Informat Engn, Beijing 100044, Peoples R China

[2] China Earthquake Adm, Inst Geophys, Res Off 6, Beijing 100081, Peoples R China

[3] Beijing Jiaotong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

来源：

IEEE SENSORS JOURNAL | 2024年 / 24卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Vibrations; Sensors; Optical fiber sensors; Optical fibers; Temperature sensors; Monitoring; Accelerometers; Fiber Bragg grating (FBG); spring leaf; ultralow frequency; vibration;

D O I：

10.1109/JSEN.2024.3418037

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Monitoring low-frequency and ultralow-frequency ( $0.01\sim 20$ Hz) vibration signals is crucial for various engineering structures and projects, including rotating machinery, bridges, dams, marine platforms, nuclear power plants, and seismic research. To address the limitations of conventional fiber Bragg grating (FBG) sensors in detecting 0.01 Hz vibrations, a novel FBG sensor with a dual-spring leaf structure is proposed. The sensor's dynamic response formula is established, and the influence of structural parameters on sensitivity and natural frequency is analyzed. Simulation analysis is conducted to determine static stress and modal characteristics, followed by performance testing using an ultralow-frequency vibration test system. Results show that the proposed sensor can effectively monitor vibration signals in the 0.01-20 Hz frequency range with a natural frequency of 50 Hz. In addition, it demonstrates displacement sensing capabilities in the 0.01-1 Hz frequency band, providing valuable insights for similar sensor designs.

引用

页码：25734 / 25741

页数：8

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