A Frequency-Flat Sagnac Optical Fiber Microphone Based on a Composite Sensing Unit

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

IEEE Sensors Journal Pub Date : 2024-10-24 DOI:10.1109/JSEN.2024.3483208

Lai Zhang;Kun Jia;Xin Lai;Yixiao Ma;Qian Xiao;Bo Jia

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引用次数: 0

Abstract

A frequency-flat Sagnac interferometer (SI) optical fiber microphone (OFM) based on a composite sensing unit is proposed. Based on the proposed acoustic composite-type modulation response model related to the acoustic loss coefficient

$\gamma \text {(} {f} \text {)}$

, a composite structure consisting of a single-mode optical fiber ring, and an aspartic polyurea resin (APR) as an acoustic sensing unit, a composite OFM (COFM) based on a composite sensing unit is prepared. The acoustic tests show that compared with the conventional SI, this COFM achieves a flatter frequency response in the range of 200–6400 Hz (an average enhancement of 21.55 dB in the frequency band of 200–1000 Hz), which solves the problem of the insensitivity of the conventional SI to low-frequency signals. Besides, this COFM performs well in terms of signal-to-noise ratio (SNR), linear response of the acoustic pressure, and the response of the respective incidence angles. These results indicate that this COFM has high sensitivity and fidelity and is suitable for acoustic detection of human sound waves in the air. In addition, the composite model can be used to tune the frequency-domain characteristics of the OFM by screening composites with corresponding

$\gamma \text {(} {f} \text {)}$

curves according to the demand, which is promising for application.

查看原文本刊更多论文

基于复合传感单元的平频萨格纳克光纤传声器

本文提出了一种基于复合传感单元的频率平坦萨格纳克干涉仪（SI）光纤传声器（OFM）。基于所提出的与声损耗系数 $\gamma \text {(} {f} \text {)}$相关的声学复合型调制响应模型、由单模光纤环和作为声学传感单元的天冬氨酸聚脲树脂（APR）组成的复合结构，制备了一种基于复合传感单元的复合光纤传声器（COFM）。声学测试表明，与传统 SI 相比，这种 COFM 在 200-6400 Hz 范围内实现了更平坦的频率响应（在 200-1000 Hz 频段内平均增强 21.55 dB），解决了传统 SI 对低频信号不敏感的问题。此外，这种 COFM 在信噪比（SNR）、声压线性响应和各入射角响应方面也表现出色。这些结果表明，这种 COFM 具有较高的灵敏度和保真度，适用于空气中人体声波的声学检测。此外，该复合模型还可根据需求筛选出具有相应 $\gamma \text {(} {f} \text {)}$曲线的复合材料，用于调整 OFM 的频域特性，应用前景广阔。

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