摘要
主要介绍了基于Φ-OTDR的分布式光纤传感系统的原理和信号处理方法,提出了利用Sobel算子处理多组瑞利散射信号来提高整体信号信噪比的方法。通过对瑞利散射信号之间的关系进行分析,提出利用单项Sobel算子进行Φ-OTDR系统中振动点振动峰值阶跃信号的查找,在提高振动点峰值幅度的同时抑制随机噪声的影响,进一步提高系统的信噪比。
This paper introduces the principle and signal processing method of the distributed optical fiber sensing system based on Ф -OTDR, it proposes the use of the Sobel operator to handle the difference of multiple Rayleigh scattering signals for improving the overall signal-noise ratio（SNR）. With analysis of the correlation of multiple Rayleigh scattering, the single Soble operator is used to peak step signal of vibration point in Ф-OTDR system, in this way, the peak amplitude of vibration point is improved, the influence of random noise is suppressed, and the noise -signal is further improved.
作者
卢珍
LU Zhen(School of Computer Engineering, Guangzhou College of South China University of Technology, Guangzhou 510800, China)
出处
《光通信技术》
北大核心
2017年第7期37-39,共3页
Optical Communication Technology
关键词
光纤光学
分布式光纤传感器
相位敏感光时域反射计
SOBEL算子
信噪比
fiber optics
distributed optical fiber sensors
phase-sensitive optical time domain reflectometer
Sobel operator
signal-noise ratio
