Highly sensitive and wide frequency response fiber-optic accelerometer array with switchable resonance frequency

IF 5.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Measurement Pub Date : 2025-06-06 DOI:10.1016/j.measurement.2025.118110

Zhengzheng Tan , Jianguan Tang , Pinzeng Cheng , Yuxiao Chen , Minghong Yang

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引用次数: 0

Abstract

To achieve distributed quantitative vibration monitoring, a mandrel-type fiber-optic accelerometer (FOA) array based on weak chirped fiber Bragg grating (wCFBG) is proposed, which has the advantages of high sensitivity and wide frequency response. The introduction of the diaphragm increases the stiffness of the FOA, and the resonant frequency can be switched by the flexible replacement of this assembly. The effect of the sensing fiber length on the FOA was experimentally investigated, and the designed FOA demonstrated a notable sensitivity of 39.47 dB @100 Hz. The FOA exhibits excellent flatness and a wide frequency response range, with a sensitivity fluctuation of 1 dB within 10–1400 Hz. The performance of the FOA was experimentally evaluated with different diaphragm thicknesses and numbers of arms. The FOA has a favorable lateral anti-interference ability, with a cross-axis sensitivity maintained below 2.87 % of the main axis. Additionally, a FOA array was constructed using the time-division multiplexing strategy based on wCFBG to achieve distributed vibration measurement. The proposed FOA array has the unique advantage of flexible resonant frequency switching, making it adaptable to vibration monitoring requirements in diverse scenarios.

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谐振频率可切换的高灵敏度宽频响光纤加速度计阵列

为了实现分布式定量振动监测，提出了一种基于弱啁啾光纤布拉格光栅（wCFBG）的芯棒型光纤加速度计阵列，该阵列具有灵敏度高、频响宽等优点。膜片的引入增加了FOA的刚度，并且可以通过灵活更换该组件来切换谐振频率。实验研究了传感光纤长度对FOA的影响，设计的FOA具有39.47 dB @100 Hz的显著灵敏度。FOA具有良好的平整度和较宽的频率响应范围，在10-1400 Hz范围内灵敏度波动为1 dB。实验评价了不同膜片厚度和臂数下FOA的性能。FOA具有良好的横向抗干扰能力，其轴向灵敏度保持在主轴的2.87%以下。在此基础上，采用基于wCFBG的时分复用策略构建了FOA阵列，实现了分布式振动测量。所提出的FOA阵列具有灵活的谐振频率开关的独特优势，使其能够适应各种场景的振动监测需求。

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来源期刊

Measurement 工程技术-工程：综合

CiteScore

10.20

自引率

12.50%

发文量

1589

审稿时长

12.1 months

期刊介绍： Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material, whose ultimate goal is an advancement in the state of the art of: measurement and metrology fundamentals, sensors, measurement instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and methodologies for plants and industrial processes, performance analysis of systems, processes and algorithms, mathematical models for measurement-oriented purposes, distributed measurement systems in a connected world.