基于LabVIEW的光纤光栅解调系统.doc

基于Lab VIEW的光纤光栅解调系统设计
摘要
光纤光栅作为一种新型的光无源器件,促成了光纤由被动的传输介质转化为主动的光子器件,拓宽了光纤技术应用范围,开创了一种在光通信、光传感领域发展的新思路。随着光纤通信和光导纤维技术的发展,光纤传感技术也逐渐发展成熟。光纤光栅传感器不仅具有可靠性好、抗电磁干扰、电绝缘、抗腐蚀、灵活方便、复用性强和能在复杂的环境下工作等特点外,而且能够实现准分布式测量,形成各种光纤传感网络等独特优点,在众多领域都有着广阔的应用前景。
本论文主要以光纤光栅传感器为研究对象,利用LabVIEW软件对其传感及解调特性进行了理论与实验研究,本篇论文分别对LabVIEW软件的功能介绍、光纤光栅传感解调系统总体方案设计、LabVIEW解调界面设计,这三个方面进行了分析与研究,设计并制作出了一套光纤光栅传感解调系统模型。
本论文是在“大学生创新性实验计划”项目()的支持下完成的,本论文的主要内容为:
1 对光纤光栅传感器的发展和应用进行简要的概述,为以后的理论分析和实验研究提供了依据。
2 系统的阐述了光纤光栅传感器系统理论,并进行了以下分析,包括:
(1) 介绍光纤光栅传感理论、传感特性。
(2) 阐述光纤光栅解调理论、技术方法。
3 对光纤光栅传感解调系统进行全面研究分析,利用LabVIEW对信号进行数据处理,求出待测量:
(1) 设计了一种可以同时测量静态与动态变量的光纤光栅传感解调系统,搭建光路部分和电路部分。
(2) 根据傅里叶变换提出一种相位检测方法,通过软件控制提高了检测精度和速度。
(3)在LabVIEW环境下通过模块化编程,实现数据自动采集、自动处理(傅里叶变换和数据拟合),并设计出控制界面。
关键词: 光纤传感器光纤光栅 M-Z干涉仪 LabVIEW 解调
A Design of Fiber Grating Demodulation System based on Lab VIEW Software
ABSTRACT
Fiber Bragg Grating is a new type of optical passive devices, which led to the emergence of optical fiber transmission medium from the passive into active photonic devices, and greatly expanding the application of fiber optic technology for munication, optical sensing and open up an application extremely wide range of new photonic devices and technologies. Optical fiber sensing technology, with the optical fiber and optical munication technology development, e a new technology. Because of its fire, explosion, high precision, low loss, small size, light weight, long life, cost effective and good reusability, fast response, resistance to ic interference, wide frequency range, dynamic range, apt pose work with optical fiber transmission system that make it widely used in many fields.
The main study of this dissertation is Fiber Bragg grating sensor,experimental research of its characteristics about sensing and demodulation theoretical by applying Lab VIEW dissertation analyze and research respectively these three aspects, the introduction of LabVIEW software's function,the design of Fiber Bragg grating sensor