Distributed optical fiber sensor based on a peak‐frequency change of a spectrum of Brillouin scattering light has been extensively studied since it can measure strain and/or temperature in various applications. The distributed optical fiber sensor observes the spectrum of backscattered light from the specified section according to a spatial resolution and determines strain and/or temperature based on the peak‐frequency change of the spectrum. However, the observed spectrum may have two maximum peaks that correspond to strain and/or temperature included in the specified section of the optical fiber. Overlapped noise by the interrogator system to two peaks on the Brillouin gain spectrum causes false detection of the maximum peak‐frequency. Although this false detection may occur, no workarounds has been discussed yet. This article proposes a workaround by method of “peak tracking and trend analysis” that considers the change of peak intensity to determine peak frequency of the spectrum and confirms its effect of preventing false peak detection of Brillouin gain spectrum.

中文翻译：

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通过峰跟踪和趋势分析防止布里渊增益谱的虚假峰检测

基于布里渊散射光频谱的峰值频率变化的分布式光纤传感器已经得到了广泛的研究，因为它可以测量各种应用中的应变和/或温度。分布式光纤传感器根据空间分辨率观察来自指定部分的反向散射光谱，并根据光谱的峰频变化确定应变和/或温度。但是，观察到的光谱可能有两个最大峰值，分别对应于光纤指定部分中包含的应变和/或温度。询问器系统将噪声重叠到布里渊增益频谱上的两个峰值会导致最大峰值频率的错误检测。尽管可能会发生这种错误检测，但尚未讨论任何解决方法。