一种基于相位调制的光纤传感预警系统

摘要

For fiber-optic line infrastructure security,and in order to improve the security level of confidential information,the optical fiber line early warning system is designed and developed,the influence of coherent light on optical fiber sensing techniques studied,and the signal reduction and notch localization in phase modulation also analyzed.Finally the fiber-optic sensing system based on phase modulation is realized,and real-time reduction of the optical fiber disturbance signal and monitoring distance of the optical fiber line accomplished.Meanwhile the intelligent recognition of vibration behavior is implement,the pattern matched in accordance with the signal characteristics.In addition,a platform of resources supervision is built up,thus to exercise unified supervision of the related equipments and improve the early-warning capability of the management staff,and via intelligent analysis,provide decision support for the management staff.%针对光纤线路基础设施安全状况,为提高机要信息安全级别,设计开发了光纤线路预警系统,并研究了相干光技术对光纤传感的影响,分析了相位调制中信号还原和陷波点定位.最终,实现了基于相位调制的光纤传感系统,实时还原了光纤扰动信号及光纤线路的监测距离定位.此外,实现了对振动行为的智能识别,并根据信号特征进行模式匹配.最后,构建资源监管平台统一监管相关设备,以提高管理人员的预警能力,并通过智能分析为管理人员提供辅助决策支持.