一种用于光纤布拉格光栅传感的自适应寻峰算法

An adaptive peak algorithm used in optical fiber Bragg grating sensing

针对现有的寻峰算法适用范围窄、需要预先设定参数的缺点,在现有的寻峰算法的基础上,提出一种自适应寻峰算法。当所分析的数据的幅度与时间尺度发生变化时,自适应算法可以自动调整窗口与门限阈值,正确的找到峰值。与现有的寻峰算法相比,该算法无需设定参数、简单可靠、适应范围广。为验证算法,对不同条件下光纤布拉格光栅的反射谱进行分析。结果表明,这种新的自适应寻峰算法能准确寻峰,适用于光纤布拉格光栅传感系统的解调。

In view of the existing peak detecting algorithms which have a narrow scope of application and must be preset with some parameters,an adaptive peak detecting algorithm based on existing peak detecting algorithms has been proposed.It adjusts the window and threshold automatically and finds the peaks correctly when the amplitude and time scale of data to be analyzed change.It has no parameter to set and it is simpler,more reliable and has a wider adaptation compared to existing peak detecting algorithms. Reflection spectrums of Bragg Grating acquired under different situation have been analyzed to validate the algorithm. The result shows that the new adaptive algorithm detects peaks accurately and it’s suitable for demodulation of fiber Bragg gratings sensing system.