Research on Diaphragm Based EFPI Fiber-Opitc Acoustic Sensor and Sensing System

Abstract

光纤声波传感器相比传统的电式声波传感器具有灵敏度高、抗电磁干扰、低传输损耗、重量轻等优势,具有广泛的应用前景。基于膜片式的非本征法布里·珀罗干涉型光纤声波传感器,是目前声波传感器研究领域中灵敏度最高一种[1],在其材料选择、结构设计、信号处理和实际应用上是当前各科研机构的研究热点。本文对这种类型的传感器进行了较为深入的研究,主要工作体现在以下几个方面: 一、针对干涉型传感器工作点漂移导致信号衰落的问题,研究了用于信号补偿的双波长正交解调法,将解调方式分类为小信号和大信号两种情况,并分析讨论了这两种情况的适用的膜片振动幅度范围。对于两路信号非完全正交的情况,改进了解调算法,分析并讨论了实际应用...Compared with the traditional electric acoustic sensor, the optical fiber acoustic sensor has the advantages of high sensitivity, anti-electromagnetic interference, low transmission loss and light weight, and has a wide application prospect. The diaphragm-based Extrinsic Fabry-Perot fiber-optic acoustic sensor is recognized as one of the most sensitive acoustic sensors in the present study so far....学位:工学硕士院系专业:信息科学与技术学院_光学工程学号:2312014115308

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