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首页> 外文期刊>IEEE sensors journal >A Novel Method of the Brillouin Gain Spectrum Recognition Using Enhanced Sobel Operators Based on BOTDA System
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A Novel Method of the Brillouin Gain Spectrum Recognition Using Enhanced Sobel Operators Based on BOTDA System

机译：基于BOTDA系统的增强型Sobel算子布里渊增益谱识别新方法。

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Enhanced Sobel operators were proposed to identify the scattering spectrum based on a Brillouin optical time-domain analysis (BOTDA) system and experimentally demonstrated. To the best of our knowledge, this is the first time to use the enhanced Sobel operators in the BOTDA system. The proposed approach regarded the Brillouin scattering spectrum as an image, where the Brillouin gain could be regarded as edges of the image, the Brillouin gain spectrum was sharpened more, and better denoising effect was achieved by the enhanced Sobel operators. Not only that, the novel method could omit the Lorentz fitting and make scattering spectrum recognition more intuitive and fast regardless of fitting multiple points caused by different temperatures or strain along the different positions of the fiber. We successfully realized the recognition method over a 14-km single-mode fiber with 10-m spatial resolution and obtained the temperature at 61.4 degrees C of the heated water, compared with the consequence (61.4 degrees C) of Lorentz curve fitting without much sacrifice of the sensing accuracy.
机译：提出了增强的Sobel算子以基于布里渊光学时域分析（BOTDA）系统识别散射光谱，并进行了实验证明。据我们所知，这是第一次在BOTDA系统中使用增强的Sobel算子。所提出的方法将布里渊散射光谱视为图像，其中布里渊增益可以视为图像的边缘，布里渊增益光谱更加锐化，并且增强的Sobel算子可以实现更好的去噪效果。不仅如此，该新方法还可以省略Lorentz拟合，并使散射光谱识别更加直观和快速，而无需拟合由沿着光纤不同位置的不同温度或应变引起的多个点。我们成功地实现了在10 km空间分辨率的14 km单模光纤上的识别方法，并获得了61.4摄氏度的热水温度，而洛伦兹曲线拟合的结果（61.4摄氏度）却没有太多牺牲感测精度。

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