本文選題：光時域反射儀 + 可編程邏輯門陣列��； 參考：《北京交通大學(xué)》2014年碩士論文

【摘要】：光纖通信以其頻帶寬、抗干擾能力強、衰減小等諸多優(yōu)點而廣泛應(yīng)用于現(xiàn)代通信系統(tǒng)中。其中對光纖的測試測量是光纖應(yīng)用中非常重要的環(huán)節(jié)。光時域反射儀(OTDR)是光纖通信系統(tǒng)中重要的測試測量儀器,它可以測量光纖通信系統(tǒng)中的光纖的實際長度、損耗,同時能探測、定位和測量光纖鏈路中不同類型的事件,廣泛應(yīng)用于光纖通信工程的現(xiàn)場安裝、維護和通信網(wǎng)的在線監(jiān)測等領(lǐng)域,具有重要的研究意義。 本論文采用高性能的可編程邏輯門陣歹(?)(FPGA)實現(xiàn)光時域反射儀的設(shè)計,首先簡要介紹了光時域反射儀的發(fā)展歷史和國內(nèi)外先進技術(shù)的研究現(xiàn)狀,提出了本項目研究的重點和創(chuàng)新點。在光時域反射儀的工作基本理論分析之后,介紹了本論文設(shè)計的系統(tǒng)結(jié)構(gòu)。在此系統(tǒng)結(jié)構(gòu)基礎(chǔ)上,論文詳細(xì)介紹了所設(shè)計的各個模塊的工作原理及其軟硬件實現(xiàn)方案,最后由FPGA控制各模塊協(xié)調(diào)工作,實現(xiàn)對光信號的發(fā)射和背向散射信號的檢測,將數(shù)據(jù)經(jīng)USB上傳給上位機做進一步的分析、處理。整個系統(tǒng)是由上位機控制FPGA完成OTDR功能的虛擬儀器的設(shè)計。 本項目設(shè)計的光時域反射儀硬件結(jié)構(gòu)精簡,算法設(shè)計合理,經(jīng)過實驗測試分析,性能良好,穩(wěn)定性高,在分辨率和動態(tài)范圍達到一定的指標(biāo),初步完成了OTDR的功能設(shè)計。
[Abstract]:Optical fiber communication is widely used in modern communication system because of its advantages such as frequency bandwidth, strong anti-jamming ability, low attenuation and so on. The measurement of optical fiber is very important in the application of optical fiber. Optical time domain reflectometer (OTDR) is an important measuring instrument in optical fiber communication system. It can measure the actual length and loss of optical fiber in optical fiber communication system, at the same time, it can detect, locate and measure different types of events in optical fiber link. It is widely used in the field of installation, maintenance and online monitoring of communication network. In this paper, the high performance programmable logic gate array (FPGA) is used to realize the design of optical time domain reflectometer. Firstly, the development history of optical time domain reflectometer and the research status of advanced technology at home and abroad are briefly introduced. The emphasis and innovation of this project are put forward. After analyzing the basic theory of optical time domain reflectometer, the system structure of this paper is introduced. On the basis of the system structure, the working principle of each module and its hardware and software implementation scheme are introduced in detail. Finally, the FPGA controls the modules to coordinate the work to realize the light signal emission and backscatter signal detection. Upload the data to the host computer through USB for further analysis and processing. The whole system is the design of the virtual instrument which is controlled by the host computer FPGA to complete the OTDR function. The optical time domain reflectometer designed by this project is simple in hardware structure and reasonable in algorithm design. After experimental test and analysis, it has good performance and high stability, and achieves certain targets in resolution and dynamic range. The function design of OTDR has been preliminarily completed.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.11

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