基于小波变换的光纤周界定位系统

钟翔; 张春熹; 林文台; 梁生

基于小波变换的光纤周界定位系统

1.
北京航空航天大学惯性技术国防重点实验室, 北京 100191
2. 北京交通大学物理系, 北京 100044

详细信息

作者简介:
钟翔(1985-),男,江西赣州人,博士生,zhx2005zhwh@126.com.

中图分类号: TP212.14
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- 文章访问数: 1576
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- PDF下载量: 583
- 被引次数: 0
出版历程
- 收稿日期: 2012-02-21
- 网络出版日期: 2013-03-31

Fiber-optic perimeter location system based on wavelet transformation

1.
National Key Lab of Inertial Technology, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2. Department of Physics, Beijing Jiaotong University, Beijing 100044, China

摘要

摘要: 为提高基于双Mach-Zehnder干涉仪结构的光纤周界定位系统的定位精度,对信号频率范围及信噪比对系统定位精度的影响进行了理论分析和仿真研究.在此基础上,提出在选用光缆时需要兼顾对外界振动的敏感性和对外场复杂环境的适应性,以确保在长期可靠运行的前提下,扩展采集信号的频率范围;使用小波阈值降噪算法,提取振动信号的有效频率成分,滤除噪声,提高信噪比.最后进行了监测距离31 km的外场实验,验证了所选用光缆的优良性能和小波降噪算法的有效性.
- 光纤传感器 /
- 振动测量 /
- 位置测量 /
- 小波变换 /
- 降噪
Abstract: In order to improve the location accuracy of dual Mach-Zehnder interferometic based fiber-optic perimeter location system, the influence of signal frequency range and signal noise ratio (SRN) was analyzed and emulated. Basing on these, a fiber cable, which combines the high-sensitivity to vibration and the adaptability to complex environment, was adopted to ensure the reliability and extend the signal frequency range. The wavelet de-noising algorithm was employed to extract the effective frequency component, filter the noise and advance the SNR. Finally, a field test with 31 km monitoring length was carried out to justify the excellent performance of the proposed fiber cable and the effectiveness of the wavelet de-noising algorithm.
- fiber optic sensors /
- vibration measurement /
- position measurement /
- wavelet transforms /
- noise reduction

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参考文献(1)

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