| 光纤分布式振动系统中的信号处理算法研究 |
| |
| 引用本文： | 文仲寺,江毅. 光纤分布式振动系统中的信号处理算法研究[J]. 仪表技术与传感器, 2020, 0(6): 95-99 |
| |
| 作者姓名： | 文仲寺 江毅 |
| |
| 作者单位： | 北京理工大学光电学院 |
| |
| 摘 要： | 在Φ-OTDR(phase-sensitive optical time-domain reflectometer,相位敏感光时域反射计)传感系统中,光纤振动信号的提取和降噪尤为重要。文章通过搭建一套光纤振动传感系统,完成信号采集,并使用低通滤波、小波降噪、小波包分解及降噪等方法完成了实验研究。提出一种协同滤波降噪的方法,能够将信号的信噪比提高5.1 dB,完成信号的定位与提取,定位精度20 m。
|
| 关 键 词： | 分布式系统 光纤振动 Φ-OTDR 低通滤波 小波降噪 小波包分解 |
Research on Signal Processing Algorithms in Optical Distributed Vibration System |
| |
| WEN Zhong-si,JIANG Yi. Research on Signal Processing Algorithms in Optical Distributed Vibration System[J]. Instrument Technique and Sensor, 2020, 0(6): 95-99 |
| |
| Authors: | WEN Zhong-si JIANG Yi |
| |
| Affiliation: | (School of Optoelectronics,Beijing University of Technology,Beijing 100081,China) |
| |
| Abstract: | In the Φ-OTDR(phase-sensitive optical time-domain reflectometer)sensing system,the extraction and noise reduction of optical fiber vibration signal is particularly important.In this paper,a set of optical fiber vibration sensor system was built to acquire signal.The experimental methods include low-pass filtering,wavelet de-noising,wavelet packet decomposition and de-noising.After using a new method of extracting and de-noising optical fiber vibration signal,the signal-to-noise ratio of the signal is improved by 5.1 dB,and the extraction of the signal location information is completed with the positioning accuracy of 20 m. |
| |
| Keywords: | distributed system fiber vibration Φ-OTDR lowpass filter wavelets de-nosing wavelets packet decomposition |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
