光纤光栅传感系统的信号解调  

Demodulation Methods of FBG Sensing System

作　　者：陈志伟[1] 谭中伟[1] 闫俊芳[1] 李睿[1] 沈笑笑[1] 

机构地区：[1]北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室,北京100044

出　　处：《光电技术应用》2012年第2期47-52,共6页Electro-Optic Technology Application

基　　金：国家自然科学基金(61177012);北京交通大学科研基金(2009JBM011)

摘　　要：首先介绍了光纤光栅的基本知识,再分别介绍了几种典型解调方法的工作原理、性能和特点,给出了其工作原理图,并对各种解调方法的优缺点进行了论述。提出了一种基于CCD的光纤光栅传感解调系统,该系统采用反射式成像系统,用CCD作为探测器,并利用可编程逻辑器件FPGA设计驱动电路和信号处理电路,实现了一种体积小、结构简单,解调速度快,可以实时测量的波长解调系统,为光纤光栅解调技术的实际应用和光纤光栅传感解调系统的设计提供了理论依据。The basic knowledge of the fiber Bragg grating（FBG） is introduced,then the working principle,performance and characteristics of several typical demodulation methods are introduced respectively.The diagrams of working principle are given,the advantages and disadvantages of various demodulation methods are discussed.A charge-coupled device（CCD）-based FBG sensing demodulation system is proposed,it uses the reflective imaging system,uses CCD as a detector,and uses the field programmable gate array FPGA to design the drive circuit and signal processing circuit.A wavelength demodulation system which has small size,simple structure,fast demodulation speed,and real-time monitoring capability is realized.These provides the theoretical basis for the practical ap plications of FBG demodulation techniques and the design of FBG demodulation system.

关 键 词：光纤光栅 光纤光栅传感 信号解调 CCD 

分 类 号：TP212.44[自动化与计算机技术—检测技术与自动化装置]