用于光纤麦克风探测系统的光纤探头设计与实现

发布时间：2018-01-16 17:18

本文关键词：用于光纤麦克风探测系统的光纤探头设计与实现　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：光纤麦克风作为光纤传感技术的一种,具有体积小、结构简单、灵敏度高、抗电磁干扰、光纤本身的低损耗、耐腐蚀和安全可靠等优良特性,在监测、安全领域具有广泛的应用前景。本文基于光强度调制的原理设计了一种光纤麦克风,具体内容如下:第一章介绍了光纤传感技术和各种麦克风的特点,并对光纤麦克风的独特优势和研究现状进行了描述。第二章详细介绍了光纤麦克风主要用到的三种调制方式,并列出了各种调制方式下已有过报道的光纤麦克风结构,并对光纤麦克风的性能指标进行了描述。第三章介绍了基于光强调制原理的光纤麦克风设计方案,并对麦克风的核心部分声敏膜片与反射膜进行了ANSYS仿真分析。仿真结果表明,所设计的光纤麦克风的频率响应和强度响应能满足应用要求。第四章是光纤麦克风的制作和测试。测试结果表明所研制的光纤麦克风具有频响宽,灵敏度高,响应线性度高的特点,所得信号经过系统解调,能清晰的还原出声音。第五章是光纤麦克风探测系统的工程应用。通过在变电站的实地测试,该系统能满足其周界声音的实时监测。最后一章对全文做总结,分析了该光纤麦克风目前存在的问题及解决的方法,为进一步的研究指明了方向。
[Abstract]:As a kind of optical fiber sensing technology, optical fiber microphone has the advantages of small volume, simple structure, high sensitivity, anti-electromagnetic interference, low loss of optical fiber itself, corrosion resistance, safety and reliability, and so on. This paper designs an optical fiber microphone based on the principle of optical intensity modulation. The main contents are as follows: chapter 1 introduces the optical fiber sensing technology and the characteristics of various microphones. The unique advantages and research status of fiber optic microphone are described. In chapter 2, three modulation modes are introduced in detail. The structure of fiber optic microphone which has been reported in various modulation modes is listed, and the performance index of optical fiber microphone is described. Chapter 3 introduces the design scheme of optical fiber microphone based on the principle of light intensity modulation. The ANSYS simulation analysis of the core part of the microphone is carried out, and the simulation results show that. The frequency response and intensity response of the designed fiber optic microphone can meet the requirements of application. Chapter 4th is about the fabrication and testing of the optical fiber microphone. The test results show that the developed fiber optic microphone has wide frequency response and high sensitivity. In response to the characteristics of high linearity, the signal can be demodulated through the system, and the sound can be clearly restored. Chapter 5th is the engineering application of optical fiber microphone detection system. The system can meet the real-time monitoring of the perimeter sound. In the last chapter, the paper summarizes the whole paper, analyzes the existing problems and solutions of the fiber optic microphone, and points out the direction for further research.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN641

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