光通信技术2024，Vol.48Issue(1)：23-28,6.DOI:10.13921/j.cnki.issn1002-5561.2024.01.005
基于改进小波变换的OTDR事件检测方法
Event detection method of OTDR based on improved wavelet transform
摘要
Abstract
To solve the problem of noise in signal,an event detection method of optical time domain reflectometer(OTDR)based on improved wavelet transform is proposed.Firstly,by improving the wavelet de-noising algorithm,a new threshold selection method and threshold judgment function are obtained.Then,the event location and the beginning end location of the fiber are measured by combining the wavelet mode maximum method and the slope legal bit,and the event attenuation loss is calculated while the event is separated and the misjudgment is eliminated.The simulation and experimental results show that the proposed method has high positioning accuracy,and the calculated position deviation of reflected event and non-reflected event is less than 5 m and 15 m,respectively.The results of event detection and analysis of the measured fiber are consistent with the connection position and the total length of the fiber.关键词
小波变换/光时域反射仪/小波去噪/事件检测/精准定位Key words
wavelet transform/optical time domain reflectometer/wavelet denoising/event detection/precise positioning分类
信息技术与安全科学引用本文复制引用
臧益鹏,李现勤,吴松桂,葛菲,王炜廷,顾文华..基于改进小波变换的OTDR事件检测方法[J].光通信技术,2024,48(1):23-28,6.基金项目
江苏省卓越博士后计划资助. （）
