基于非均匀采样的?-OTDR仿真与信号处理  

?-OTDR Simulation and Signal Processing Based on Non-uniform Sampling

作　　者：郑亮 乔小瑞[1] 舒畅[1] 王瑛剑[1] ZHENG Liang;QIAO Xiaorui;SHU Chang;WANG Yingjian(School of Electronic Engineering,Naval University of Engineering,Wuhan 430000)

机构地区：[1]海军工程大学电子工程学院,武汉430000

出　　处：《舰船电子工程》2020年第7期97-102,共6页Ship Electronic Engineering

摘　　要：针对基于非均匀采样的相位敏感光时域反射计(?-OTDR)系统的信号处理问题,提出了一种利用离散频域信号标准差的改变值来定位振源并求解振动频率的方法。论文对?-OTDR的传统理论模型进行了改进,利用改进的模型对基于非均匀采样方法的?-OTDR系统进行了仿真。在此基础上,对新提出的信号处理方法进行了仿真研究,并与传统移动平均法做了对比。研究结果表明,这一方法适用于频域符合稀疏特性的振动信号,且定位信噪比优于传统的移动平均方法。Aiming at the signal processing problem of phase-sensitive optical time domain reflectometer (?-OTDR)system based on non-uniform sampling,a method for locating the vibration source and calculating the vibration frequency by using the change value of the standard deviation of the discrete frequency domain signal is proposed. This paper improves the traditional theoretical model of ?-OTDR. Simulated ?-OTDR system based on non-uniform sampling method by using improved model. On this basis,the new signal processing method is simulated and compared with the traditional moving average method. The research results show that this method is suitable for vibration signals with sparse characteristics in the frequency domain,and the positioning signal-to-noise ratio is better than the traditional moving average method.

关 键 词：分布式光纤传感 信号处理 MATLAB仿真 非均匀采样 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN911.7[自动化与计算机技术—控制科学与工程]