基于φ-OTDR光纤振动传感系统模式识别方法

提出一种基于相位敏感光时域反射计(φ-OTDR)的光纤振动传感系统, 提取信号的主波能量、 主瓣时延、 主波峰峰值、 主波Q值、 频谱、 3 dB时延、 主瓣峰值、 中心频率、 二次回波损耗、 波数和半波长度11种特征参量作为参考衡量标准, 用多参量模糊评价矩阵的目标识别方法, 对5组200次实验进行相似目标识别分类. 结果表明,  该方法通过多角度参量进行目标衡量判别, 综合识别率达90.87%, 提高了相似识别的准确性.

Mode Recognition Method of Optical Fiber Vibration Sensing System Based on φ-OTDR

We proposed an optical fiber vibration sensing system based on φ-optical time domain reflectometer (φ-OTDR). Eleven characteristic parameters, such as main wave energy, main lobe delay, main peak value, main wave Q value, signal spectrum, 3 dB time delay, peak value of main lobe, center frequency, second return loss, wave number and half wave length were extracted as reference criteria, and the target recognition method of multi-parameter fuzzy evaluation matrix was used to recognize and classify similar targets in five groups of 200 experiments. The results show that the comprehensive recognition rate is 90.87%. This method improves the accuracy of similarity recognition by using multi-angle parameters to measure and discriminate targets.