现代电子技术2012，Vol.35Issue(17)：51-53,3.
小波阈值降噪法在Φ-OTDR扰动传感系统中的应用
Application of wavelet threshold denoising in Φ-OTDR system
尚静 1杨德伟 1李立京 1李勤 1钟翔1
作者信息
- 1. 北京航空航天大学仪器科学与光电工程学院,北京 100191
- 折叠
摘要
Abstract
In order to solve the existing problem of poor SNR in distributed optical fiber disturbance sensing system based on phrase sensitive optical time domain reflectometer (Φ-OTDR) at the present time, wavelet threshold denoising method is given to reduce the noise in systematic sampling signal before other steps in this paper. Through the analysis of the effective signal's characteristics of the system and comparison of the different effects produced by mandatory threshold method, soft threshold method and hard threshold method in wavelet threshold denoising method, hard threshold method is chosen to reduce the noise. In the experiment, the SNR of disturbance signal before noise reduction is compared with that of disturbance signal after noise reduction quantitatively, and it proves that after noise reduction of systematic sampling signal using hard threshold method, the SNR is increased nearly twice in the iater process of location algorithm.关键词
分布式光纤传感/相位敏感光时域反射计/小波降噪/硬阈值法Key words
distributed optical fiber sensing/ phase sensitive optical time domain reflectometer/ wavelet denoising/ hard threshold method分类
信息技术与安全科学引用本文复制引用
尚静,杨德伟,李立京,李勤,钟翔..小波阈值降噪法在Φ-OTDR扰动传感系统中的应用[J].现代电子技术,2012,35(17):51-53,3.
