基于FPGA的光时域反射仪的设计与研制

发布时间：2018-06-29 07:01

本文选题：光时域反射仪 + 可编程逻辑门阵列　；参考：《北京交通大学》2014年硕士论文

【摘要】：光纤通信以其频带宽、抗干扰能力强、衰减小等诸多优点而广泛应用于现代通信系统中。其中对光纤的测试测量是光纤应用中非常重要的环节。光时域反射仪(OTDR)是光纤通信系统中重要的测试测量仪器,它可以测量光纤通信系统中的光纤的实际长度、损耗,同时能探测、定位和测量光纤链路中不同类型的事件,广泛应用于光纤通信工程的现场安装、维护和通信网的在线监测等领域,具有重要的研究意义。本论文采用高性能的可编程逻辑门阵歹(?)(FPGA)实现光时域反射仪的设计,首先简要介绍了光时域反射仪的发展历史和国内外先进技术的研究现状,提出了本项目研究的重点和创新点。在光时域反射仪的工作基本理论分析之后,介绍了本论文设计的系统结构。在此系统结构基础上,论文详细介绍了所设计的各个模块的工作原理及其软硬件实现方案,最后由FPGA控制各模块协调工作,实现对光信号的发射和背向散射信号的检测,将数据经USB上传给上位机做进一步的分析、处理。整个系统是由上位机控制FPGA完成OTDR功能的虚拟仪器的设计。本项目设计的光时域反射仪硬件结构精简,算法设计合理,经过实验测试分析,性能良好,稳定性高,在分辨率和动态范围达到一定的指标,初步完成了OTDR的功能设计。
[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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.11

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