An Improved Positioning Algorithm With High Precision for Dual Mach-Zehnder Interferometry Disturbance Sensing System

被引：41

作者：

Chen, Qinnan ^{[1
]}

Liu, Tiegen ^{[1
]}

Liu, Kun ^{[1
]}

Jiang, Junfeng ^{[1
]}

Shen, Zhe ^{[2
]}

Ding, Zhenyang ^{[1
]}

Hu, Haofeng ^{[1
]}

Huang, Xiangdong ^{[3
]}

Pan, Liang ^{[1
]}

Ma, Chunyu ^{[1
]}

机构：

[1] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

[2] Univ Liverpool, Dept Elect Engn & Elect, Liverpool L69 3GJ, Merseyside, England

[3] Tianjin Univ, Sch Elect Informat Engn, Tianjin 300072, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2015年 / 33卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Distributed fiber-optic sensor; fence perimeter application; general cross correlation; positioning algorithm; zero-crossing rate; DELAY ESTIMATION; NOISE;

D O I：

10.1109/JLT.2015.2394494

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An improved positioning algorithm for dual Mach-Zehnder interferometry (DMZI) disturbance sensing system is proposed. We employ zero-crossing method, which can be computed easily to extract the disturbance signal segment with maximum zero-crossing rate. Meanwhile, we use general cross correlation based on Wiener filtering and G(nn) subtraction weighting function (WG-GCC) to estimate the time delay of the extracted signal, which is robust to the correlated noise. Finally, we experimentally demonstrate that the proposed positioning algorithm can greatly improve the positioning accuracy with positioning error of +/- 20 m. Compared with the traditional positioning algorithm, the positioning error has been reduced by an order of magnitude. This algorithm has a promising potential in real-time fence perimeter applications.

引用

页码：1954 / 1960

页数：7

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