短距离光纤应变传感系统

发布时间：2018-03-27 09:07

本文选题：光纤　切入点：应变　出处：《复旦大学》2014年硕士论文

【摘要】：近年来,随着光通信技术的快速发展,且由于光纤本身的体小质轻,易弯曲,抗电磁干扰性好,抗辐射性能好,特别适合与易燃、易爆、空间受严格限制及强电磁干扰等恶劣环境下使用,光纤应变传感器快速兴起并发展。随着科技的发展,在军事、医疗和科研等领域中使用的电子仪器设备趋向于小型化、高精度发展,这对光纤应变传感器提出了更高的要求。本实验组系统在全光纤干涉系统中构建反馈环,首次采用单芯光纤作为传感光纤,结合快速傅里叶变换和小波变换对信号进行处理,实现了对随机扰动源的监测定位。本文基于此种现状和需求,对光纤应变传感器做了深入分析和研究,提出了用于短距离动态应变测量和用于短距离静态应变测量的两套实验系统,并取得了满意的实验结果。本文分为两大部分,第一、二为第一大部分,主要着重于光纤应变传感器所涉及的原理的介绍和理论的分析。第三、四章为第二大部分,通过作者在对前一部分基础理论和原理的引入,对光纤应变传感器进行了深入研究。并设计提出了分别应用于短距离动态应变测量和短距离静态应变测量的两套实验系统,介绍了实验系统的构建,详细阐述了实验原理,分析了实验结果并提出了实验系统未来的发展构建。本文提出的实验系统结构简单,测算方便,且具有较高的灵敏度,具有实际的使用意义。本文的工作为在实际应用中进行短距离精密仪器的应变监测提供了理论和实验基础。
[Abstract]:In recent years, with the rapid development of optical communication technology, and due to the small body weight of optical fiber itself, easy to bend, good electromagnetic interference resistance, good radiation resistance, especially suitable for flammable, explosive, With the development of science and technology, electronic instruments used in military, medical and scientific fields tend to be miniaturized. With the development of high precision, the optical fiber strain sensor is required higher. In this experiment system, the feedback loop is constructed in all optical fiber interference system, and the single core fiber is used as the sensing fiber for the first time. Combining FFT and wavelet transform to process the signal, the monitoring and localization of random disturbance source is realized. Based on this situation and demand, the fiber optic strain sensor is deeply analyzed and studied in this paper. Two sets of experimental systems for short range dynamic strain measurement and short distance static strain measurement are proposed, and satisfactory experimental results are obtained. This paper is divided into two parts, the first part is the first part, the second part is the first part. It mainly focuses on the introduction and theoretical analysis of the principles involved in the fiber optic strain sensor. Chapter three and four are the second part, through the introduction of the former part of the basic theory and principle. In this paper, the fiber optic strain sensor is deeply studied, and two sets of experimental systems are designed for short range dynamic strain measurement and short distance static strain measurement, respectively. The construction of the experimental system is introduced, and the experimental principle is described in detail. The experimental results are analyzed and the future development and construction of the experimental system are put forward. The proposed experimental system is simple in structure, convenient in measuring, and has high sensitivity. The work of this paper provides a theoretical and experimental basis for strain monitoring of short distance precision instruments in practical application.
【学位授予单位】：复旦大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.11

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