分布式光纤振动检测方案及应用

The Scheme and Application of Distributed Optical Fiber Vibration Sensing System

在分析网络通信安全需求的基础上,阐述了光纤传感技术和光缆状态实时监测技术对网络通信安全的保障作用。介绍了光纤传感技术的发展历史以及具有代表性的光纤传感器,然后介绍了分布式光纤振动传感系统的原理和工作方式,并对该系统的解调方法进行了分析。为了获得更高的信噪比,通过实验分析了数据解调中延迟差分对信噪比的影响。结果表明,在一定范围内,延迟时间与信噪比正相关。

Based on the analysis of the requirement of network communication security,the safeguard effect of optical fiber sensing and real-time monitoring technology of fiber optic cable status for network communication security is expounded.Firstly,the development history of optical fiber sensing technology and the representative optical fiber sensors are introduced,then the principle and working mode of distributed optical fiber vibration sensing system are introduced.And the demodulation method of distributed optical fiber vibration sensing system is analyzed.In order to obtain a higher SNR,the effect of delay difference on SNR in the data demodulation is analyzed through experiments.The experimental results show that the delay time is positively correlated with the SNR in a certain range.