【作者】 李琦；

【导师】 文爱军； 陈晓；

【作者基本信息】 西安电子科技大学 ， 电子与通信， 2007， 硕士

【摘要】 现代通信,尤其是现代军用通信对信息传输质量和可靠性的要求很高,为降低线路阻断带来的巨大损失和较高的维护成本,对光缆线路自动倒换保护这一简单、实用、经济的通信保护与恢复技术进行探索性的应用研究和技术革新具有很强的实用价值。本论文针对国内现行光缆线路自动倒换保护方式投入成本高、占用光缆资源大、应用方式单一、灵活性差,只能预先规划建设,不能利用已建甚或废旧光缆线路进行局部改造等不足,提出了运用波分复用无源光网络技术,对光通信传输段内任意阻断高风险区进行双路由或多路由自动倒换保护的系统设计思想。论文在充分研究和了解全光通信、弱光检测以及自动倒换的原理和特点的基础上,对倒换保护装置的光路和部分检测控制电路进行了计算机仿真分析,并完成了检测控制电路的软、硬件设计与实现。通过对仿真结果和软、硬件程序进行分析和调试,各项指标基本达到设计要求。最后,从降低系统功率损耗,提高可靠性方面分析,提出了进一步的改进意见。更多还原

【Abstract】 Modern communications, especially modern military communications have high demands for quality and reliability of information transmission. In order to reduce the high maintenance costs and the huge losses caused by line breaking, the research on the exploration and application of optical fiber cable line automatic switching protection technology which is a simple, practical and economic communication protective and restoring technology is of a strong practical value.The existing domestic technology of optical fiber cable line automatic switching protection has existing limits such as, high production costs, large occupancy of cable resources, single application mode, poor flexibility. And it needs advanced plan before being built, but can not make use of the existing or waste optical fiber cable lines for partially modification. The paper puts forward the design idea that with the use of wavelength division multiplexing passive optical network, dual-routing or multi-routing automatic switching protection can be processed in optical communication line within the arbitrary breaking high-risk areas. Based on the full study and understanding of the theories and features of all-optical communication, weak light measuring and automatic switching protection, the paper conducted computer simulation analysis on the optical path of switching protective system and part of the detection and control circuits, and finished the design and implementation of the soft and hard wares of the detection and control circuits.According to the results of the computer simulating analysis and the debugging and analysis of the soft and hard ware programs, various indexes basically meet the design requirements.Finally, from the analysis of lower system power loss and reliability improvement ,the paper gives advices on further improvement.更多还原