| 基于零电平处信号导数分析的分布式光纤传感定位算法研究 |
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| 引用本文： | 张笑平,刘铁根,刘琨,江俊峰,丁振扬,王博,陈沁楠.基于零电平处信号导数分析的分布式光纤传感定位算法研究[J].光电子．激光,2013(3):558-562. |
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| 作者姓名： | 张笑平 刘铁根 刘琨 江俊峰 丁振扬 王博 陈沁楠 |
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| 作者单位： | 天津大学 精密仪器与光电子工程学院 光电信息技术教育部重点实验 室,天津 300072;天津大学 精密仪器与光电子工程学院 光电信息技术教育部重点实验 室,天津 300072;天津大学 精密仪器与光电子工程学院 光电信息技术教育部重点实验 室,天津 300072;天津大学 精密仪器与光电子工程学院 光电信息技术教育部重点实验 室,天津 300072;天津大学 精密仪器与光电子工程学院 光电信息技术教育部重点实验 室,天津 300072;天津大学 电子信息工程学院,天津 300072;天津大学 精密仪器与光电子工程学院 光电信息技术教育部重点实验 室,天津 300072 |
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| 基金项目： | 国家重点基础研究发展计划(2010CB327806)、国家自然科学基金(11004150,0)、天津市科技支撑计划(11ZCKFGX01900)、中国博士后科学基金(201003298)、教育部博士点基金 (20090032110051)和教育部留学回国人员科研启动基金资助项目 (1.天津大学 精密仪器与光电子工程学院 光电信息技术教育部重点实验室,天津 300072； 2.天津大学 电子信息工程学院,天津 300072) |
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| 摘 要： | 为了提高基于双Mach-Zehnder干涉(DMZI)原理的 分布式光纤传感系统的性能,提出一种 基于零电平处信号导数分析的快 速定位算法。利用信号在零电平处的导数大小,提取信号中最高频率附近的一段进行 时延估计,进而获得扰动发生位置。 由于提取信号的频率和带宽相对较大,因此系统的定位误差较小。与离散小波提取起始点信 号相比,本文算法能够适应更多的扰 动事件类型,且由于离散信号导数计算的复杂度远低于离散小波的傅里叶变换,运算时间大 幅降低,提高了系统的实时性。实 验结果表明,本文算法在10M/s采样率下,最大定位误差为 20m,而且计算时间少于0.13s。
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| 关 键 词： | 双Mach-Zehnder干涉(DMZI) 零电平 导数 定位误差 实时 |
| 收稿时间： | 2012/8/31 0:00:00 |
| 修稿时间： | 2012/9/22 0:00:00 |
A distributed sensing positioning algorithm based on derivati ve analysis at zero level of signal |
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| ZHANG Xiao-ping,LIU Tie-gen,LIU Kun,JIANG Jun-feng,DING Zhen-yang,WANG Bo and CHEN Qin-nan.A distributed sensing positioning algorithm based on derivati ve analysis at zero level of signal[J].Journal of Optoelectronics·laser,2013(3):558-562. |
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| Authors: | ZHANG Xiao-ping LIU Tie-gen LIU Kun JIANG Jun-feng DING Zhen-yang WANG Bo and CHEN Qin-nan |
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| Affiliation: | Key Laboratory of Optoelectronics Information Technology of Ministry of Edu cation,College of Precision Instrument and Optoelectronics Engineering,Tianjin Univer sity,Tianjin 300072,China;Key Laboratory of Optoelectronics Information Technology of Ministry of Edu cation,College of Precision Instrument and Optoelectronics Engineering,Tianjin Univer sity,Tianjin 300072,China;Key Laboratory of Optoelectronics Information Technology of Ministry of Edu cation,College of Precision Instrument and Optoelectronics Engineering,Tianjin Univer sity,Tianjin 300072,China;Key Laboratory of Optoelectronics Information Technology of Ministry of Edu cation,College of Precision Instrument and Optoelectronics Engineering,Tianjin Univer sity,Tianjin 300072,China;Key Laboratory of Optoelectronics Information Technology of Ministry of Edu cation,College of Precision Instrument and Optoelectronics Engineering,Tianjin Univer sity,Tianjin 300072,China;School of Electronic Information En gineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Optoelectronics Information Technology of Ministry of Edu cation,College of Precision Instrument and Optoelectronics Engineering,Tianjin Univer sity,Tianjin 300072,China |
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| Abstract: | In order to improve the performance of dual Mach-Zehnder interferometer (DMZI) distributed optical fiber sensing system,a positioning algorithm based on signal derivative analysis is proposed in this paper.By means of the derivative value at the zero level of the signal,the algorithm first extracts h igh frequency part from the original signal and then delay estimation is carried out for this part of signal to get t he invasion event location.Since the frequency and bandwidth of the extracted signal are relatively large,the pos itioning error of the system is small.Compared with extracting the signal of starting point by discre te wavelet,the algorithm can adapt to more vibration event types and due to the computation of derivative is much l ower than the Fourier transform,the computation time is significantly reduced and the real-time performance is impr oved.Experimental results show that by using sampling rate of 10M/s,the algorithm has a low positioning error of 20m and th e processing time is less than 0.13s.The performance of the system is improved. |
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| Keywords: | dual Mach-Zehnder interferometer (DMZI) zero level derivative positioning er ror real-time |
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