Highly Sensitive Low-Frequency Magnetic Field Sensing System Based on Fiber FPI

IF 4.3 2区综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Sensors Journal Pub Date : 2024-12-31 DOI:10.1109/JSEN.2024.3521446

Ziyue Wang;Bing Wei;Hanfeng Xu;Ling Yang;Hai He;Xiaofeng Jin

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引用次数: 0

Abstract

A fiber Fabry-Pérot interferometer (FPI)-based sensing system for low-frequency weak magnetic field detection is proposed and experimentally demonstrated. Within the sensor head, a mechanic transform structure is designed and fabricated to amplify the displacement of a magnetostrictive TbDyFe rod under a proper magnetic bias, resulting in significant cavity length change of the FPI with external alternating magnetic field. The dynamic interference spectrum of the FPI is acquired by a spectrometer for high-speed demodulation. A modified Hilbert transform combined with a cumulative average method is performed to recover the signal of magnetic field with suppressed noise. A magnetic field sensitivity of

$2.69\times 10^{-{4}}$

rad/

$\mu $

T and a minimum detectable magnetic field of up to 12.60 nT/Hz

$^{\text {1/2}}$

at 60 Hz are achieved. The proposed fiber magnetic field sensing system exhibits good linearity and compactness, high sensitivity and resolution, and flat frequency response under 1 kHz; hence, it has great potential in the field of weak magnetic field sensing.

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基于光纤FPI的高灵敏度低频磁场传感系统

提出了一种基于光纤法布里-波干涉仪（FPI）的低频弱磁场检测系统，并进行了实验验证。在传感器头部设计并制造了一种机械变换结构，在适当的偏磁下放大磁致伸缩TbDyFe棒的位移，使FPI在外加交变磁场作用下腔长发生显著变化。利用光谱仪进行高速解调，获得了FPI的动态干扰谱。采用改进的希尔伯特变换与累积平均法相结合的方法恢复了噪声被抑制的磁场信号。磁场灵敏度为$2.69\ × 10^{-{4}}$ rad/ $\mu $ T，最小可探测磁场在60 Hz时高达12.60 nT/Hz $^{\text{1/2}}$。所提出的光纤磁场传感系统具有良好的线性度和紧凑性，高灵敏度和分辨率，在1 kHz下频率响应平坦；因此，它在弱磁场传感领域具有很大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Sensors Journal 工程技术-工程：电子与电气

CiteScore

7.70

自引率

14.00%

发文量

2058

审稿时长

5.2 months

期刊介绍： The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following: -Sensor Phenomenology, Modelling, and Evaluation -Sensor Materials, Processing, and Fabrication -Chemical and Gas Sensors -Microfluidics and Biosensors -Optical Sensors -Physical Sensors: Temperature, Mechanical, Magnetic, and others -Acoustic and Ultrasonic Sensors -Sensor Packaging -Sensor Networks -Sensor Applications -Sensor Systems: Signals, Processing, and Interfaces -Actuators and Sensor Power Systems -Sensor Signal Processing for high precision and stability (amplification, filtering, linearization, modulation/demodulation) and under harsh conditions (EMC, radiation, humidity, temperature); energy consumption/harvesting -Sensor Data Processing (soft computing with sensor data, e.g., pattern recognition, machine learning, evolutionary computation; sensor data fusion, processing of wave e.g., electromagnetic and acoustic; and non-wave, e.g., chemical, gravity, particle, thermal, radiative and non-radiative sensor data, detection, estimation and classification based on sensor data) -Sensors in Industrial Practice