光缆资源管理系统中故障定位技术的研究-计算机技术专业论文.docxVIP

华北电力大学硕士学位论文 华北电力大学硕士学位论文 I I 摘 要 随着信息化时代的临近，光纤通信在人们的科研、工作和生活中越来越重要。 由于光纤通信具有带宽高、容量大、速率高、抗电磁干扰、传输距离远、重量轻、 体积小等特点，它已经成为现代通信网的主要传输媒介，并广泛应用于长途干线通 信系统、光纤接入网传输系统。光纤通信深刻地、广泛地改变了通信网架构的整体 面貌。 随着光缆传输线路长度的增长，施工、道路改迁以及其他自然灾害的发生，光 缆隐患和故障逐渐增多，这严重影响通信网络的正常运行，甚至导致整个通信网络 的瘫痪，从而造成巨大的经济损失。如何进一步提高光纤通信的可靠性，及时有效 地对光缆线路实时监控与管理，准确地捕捉故障征兆和隐患，精确定位故障的地理 位置，已经成为当前所面临的一项重要课题。 本文主要根据光缆资源管理的需求，设计和实现了基于 Google Maps 的光缆资 源管理系统。该系统结合 GPS 卫星定位、WebGIS 地理信息、数据库技术，采用 B/S 系统架构和 J2EE 开发框架，实现了用户管理和点资源、路由、缆纤的日常管 理功能，并对光缆故障点进行了精确定位。本文根据光纤通信原理和 OTDR 测试 曲线在光纤熔接点、断裂点发生跳跃的特点，结合基于 Google Maps 的距离计算公 式和 GPS 坐标纠偏，设计光缆故障定位算法，通过对测试路由中光缆段的查找、 发生故障光缆段故障点坐标的计算，实现了故障的准确定位。 关键词：OTDR；故障定位；Google Maps；GPS 纠偏 II II Abstract With the approach of the information age, optical fiber communication is more and more important in peoples scientific research, work and life. Because of its high bandwidth, large capacity, high speed, resistance to electromagnetic interference, long transmission distance, light weight and small size, optical fiber communication becomes the main transmission means for the modern communication network.Optical fiber communication is widely used in long haul communications systems and the optical fiber access network transmission system.It changes the overall condition of communication network architecture deeply and widely. As the growth of the optical cable transmission lines, the construction, the roads plan changed by people and other natural disasters, the hidden troubles and failures of fiber optic cable are growing gradually, which influence the normal operation of the communication network seriously, even lead to the paralysis of the entire communication network and huge economic losses. How to improve the reliability of optical fiber communication, monitore and manage effectively the optical cable lines timely, capture the fault symptom and hidden trouble accurately, and at the same time locate the failure site accurately has already become an important subject up to now. Based on the demand of fi