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首页> 外文期刊>Sensors Journal, IEEE >Detailed Evaluation of Centroid Analysis for Extracting Brillouin Frequency Shift of Fiber Distributed Sensors
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Detailed Evaluation of Centroid Analysis for Extracting Brillouin Frequency Shift of Fiber Distributed Sensors

机译：质心分析提取光纤分布式传感器布里渊频移的详细评估

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摘要

Performances of centroid analysis (CA) used for extracting Brillouin frequency shift (BFS) from noisy signals are studied in this paper. The variance of extracted BFS, i.e., the minimum detectable BFS, is deduced as a function of signal-to-noise ratio, frequency step, Brillouin linewidth, and the data window used in the analysis. It is found theoretically that both of the averaged BFS and its variance are susceptible to the deviation of data window center from real-Brillouin central frequency, termed data window deviation (DWD). The theoretically analyzed results are verified by experiments and simulation, showing good agreement with each other. Since the DWD occurs often for noisy signals, an iterative CA (ICA) is proposed and demonstrated to reduce this impact and improve the accuracy of CA. Compared with curve fitting methods (CFM) the CA has attractive features, such as extremely shorter time of processing. The CA is especially suitable for extracting BFS from complicated spectra observed often in sensors paved in fields, for which the usual CFM may yield wrong results.
机译：研究了用于从噪声信号中提取布里渊频移（BFS）的质心分析（CA）的性能。推断出提取的BFS的方差，即最小可检测的BFS，是信噪比，频率步长，布里渊线宽和分析中使用的数据窗口的函数。从理论上发现，平均BFS及其方差都容易受到数据窗口中心与实际布里渊中心频率的偏差的影响，称为数据窗口偏差（DWD）。理论分析的结果通过实验和仿真得到验证，相互之间具有很好的一致性。由于DWD经常发生在嘈杂的信号中，因此提出并证明了迭代CA（ICA）可以减少这种影响并提高CA的准确性。与曲线拟合方法（CFM）相比，CA具有吸引人的功能，例如处理时间极短。 CA特别适用于从在现场铺设的传感器中经常观察到的复杂光谱中提取BFS，为此，通常的CFM可能会产生错误的结果。

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  • 来源
    《Sensors Journal, IEEE》 |2019年第1期|163-170|共8页
  • 作者

    Hanrong Zheng; Zujie Fang; Zhaoyong Wang; Bin Lu; Yulong Cao; Qing Ye; Ronghui Qu; Haiwen Cai;

  • 作者单位

    Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China;

    Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China;

    Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China;

    Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China;

    Nanjing Pioneer Lasersensing Co., Ltd., Nanjing, China;

    Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China;

    Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China;

    Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Optical fiber sensors; Signal to noise ratio; Fitting; Fluctuations; Brillouin scattering;

    机译：光纤传感器;信噪比;拟合;波动;布里渊散射;

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