单项Sobel算子提高Φ-OTDR信噪比方法的研究  

Study of improving the signal-noise ratio of Φ-OTDR based on single Sobel operator

作　　者：卢珍[1] LU Zhen(School of Computer Engineering, Guangzhou College of South China University of Technology, Guangzhou 510800, China)

机构地区：[1]华南理工大学广州学院计算机工程学院,广州510800

出　　处：《光通信技术》2017年第7期37-39,共3页Optical Communication Technology

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.

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 

分 类 号：TN911[电子电信—通信与信息系统]