【摘要】：基于LabVIEW的光纖傳感信號解調(diào)技術(shù)可以快速的檢測出由于溫度和應(yīng)變的變化而引起的布里淵散射信號強(qiáng)度和頻移，在實(shí)際工程應(yīng)用中潛力巨大。布里淵散射的分布式光纖傳感技術(shù)可以用來檢測石油、天然氣管道的泄露，橋梁、隧道等大型混凝土結(jié)構(gòu)的溫度和應(yīng)力，，通過溫度和應(yīng)變的變化，隨時(shí)準(zhǔn)確全面的了解被測目標(biāo)的各種情況，預(yù)防火災(zāi)和坍塌等事故的發(fā)生，以保障人們生命財(cái)產(chǎn)安全。針對這些問題，本文提出的基于LabVIEW的光纖傳感信號解調(diào)主要是為了解決布里淵散射信號弱，且傳統(tǒng)技術(shù)相對復(fù)雜，解調(diào)速度慢，成本高的問題，為研制快速解調(diào)的布里淵傳感器奠定基礎(chǔ)。 論文的主要研究內(nèi)容包括： （1）介紹了本文的研究背景，著重介紹了布里淵光時(shí)域反射技術(shù)的國內(nèi)外研究進(jìn)展及兩種主要的布里淵散射頻率解調(diào)方法，分析了光纖中的布里淵散射理論和傳感原理，為理解布里淵分布式傳感系統(tǒng)信號的產(chǎn)生奠定理論基礎(chǔ)。 （2）研究了BOTDR系統(tǒng)結(jié)構(gòu)設(shè)計(jì)及基于LabVIEW的相應(yīng)軟件系統(tǒng)設(shè)計(jì)。建立了BOTDR相干檢測系統(tǒng)，對軟件系統(tǒng)的功能模塊化，并對采集數(shù)據(jù)的分析與管理做了詳細(xì)的闡述。 （3）設(shè)計(jì)基于LabVIEW的軟件系統(tǒng)功能模塊。研究并設(shè)計(jì)了數(shù)據(jù)采集模塊、數(shù)據(jù)處理模塊、數(shù)據(jù)存儲模塊，并詳細(xì)闡述了各個(gè)功能模塊的功能。 （4）對BOTDR數(shù)據(jù)采集系統(tǒng)功能測試及其數(shù)據(jù)分析，并對26Km傳感光纖的頻率解調(diào)結(jié)果分析，對系統(tǒng)中存在的主要問題進(jìn)行了說明。
[Abstract]:The optical fiber sensing signal demodulation technology based on LabVIEW can quickly detect the Brillouin scattering signal intensity and frequency shift caused by the change of temperature and strain, which has great potential in practical engineering applications. Brillouin scattering distributed optical fiber sensing technology can be used to detect the leakage of oil and natural gas pipelines, bridges, tunnels and other large concrete structures, temperature and stress, through the temperature and strain changes, In order to ensure the safety of people's life and property, we can understand exactly and comprehensively all kinds of situations of the tested target, prevent fire and collapse and so on. In order to solve these problems, the optical fiber sensing signal demodulation based on LabVIEW is mainly to solve the Brillouin scattering signal weak, and the traditional technology is relatively complex, the demodulation speed is slow, and the cost is high. It lays a foundation for the development of Brillouin sensor with fast demodulation. The main contents of this thesis are as follows: (1) the research background of this paper is introduced, and the research progress of Brillouin optical time domain reflectometry and two main methods of Brillouin scattering frequency demodulation are emphatically introduced. The Brillouin scattering theory and sensing principle in optical fiber are analyzed, which lays a theoretical foundation for understanding the signal generation of Brillouin distributed sensing system. (2) the structure design of BOTDR system and the corresponding software system design based on LabVIEW are studied. The BOTDR coherent detection system is established, the function of the software system is modularized, and the analysis and management of the collected data are described in detail. (3) Design the function module of software system based on LabVIEW. The data acquisition module, data processing module and data storage module are studied and designed, and the functions of each function module are described in detail. (4) the function test and data analysis of BOTDR data acquisition system, and the frequency demodulation results of 26Km sensing fiber are analyzed, and the main problems in the system are explained.
【學(xué)位授予單位】：中國計(jì)量學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN253;TN911.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 黃民雙，陳偉民，黃尚廉;光纖中光散射及在分布式傳感技術(shù)中的應(yīng)用[J];傳感器技術(shù);1995年02期

2 黃聲享,劉經(jīng)南;GPS變形監(jiān)測系統(tǒng)中消除噪聲的一種有效方法[J];測繪學(xué)報(bào);2002年02期

3 陳軍,李永麗;應(yīng)用于高壓電纜的光纖分布式溫度傳感新技術(shù)[J];電力系統(tǒng)及其自動化學(xué)報(bào);2005年03期

4 宋立新;韓紅遠(yuǎn);;分布式光纖測溫在地鐵火災(zāi)預(yù)警系統(tǒng)中的應(yīng)用[J];都市快軌交通;2010年06期

5 李光宇,蔣佩璇;布里淵散射在光纖拉伸應(yīng)變分布測量中的應(yīng)用[J];光通信技術(shù);1999年01期

6 張競文;呂安強(qiáng);李寶罡;楊志;;基于BOTDA的分布式光纖傳感技術(shù)研究進(jìn)展[J];光通信研究;2010年04期

7 張淑敏;畢麗紅;馬艷芳;;基于LabVIEW的數(shù)據(jù)庫管理系統(tǒng)[J];工業(yè)控制計(jì)算機(jī);2010年09期

8 史曉鋒 ,李錚 ,蔡志權(quán);分布式光纖測溫系統(tǒng)及其測溫精度分析[J];測控技術(shù);2002年01期

9 張?jiān)谛?王劍鋒,劉紅林,余向東,郭寧,Insoo S.KIM;30km遠(yuǎn)程分布光纖拉曼溫度傳感器系統(tǒng)的實(shí)驗(yàn)研究[J];中國激光;2004年05期

10 熊曉方;王凱睿;;分布式光纖溫度傳感技術(shù)及其應(yīng)用[J];江西電力;2007年03期

本文編號：2467366