研究分布式光纤振动传感技术及光纤振动信号的模式识别技术。通过M-Z干涉原理实现对振动信号的检测,通过信号双向时延定位技术实现光纤振动信号的定位。运用不同的数学方法对光纤振动信号进行分析,找出不同事件产生的振动信号的特征信息,并运用MATLAB进行仿真分析。通过仿真分析,证实了系统能找到挖掘机、车辆及人员走动的特征参数,从而能将这三种不同的事件区分开来。

Distributed optical fiber vibration sensing technology and fiber-optic vibration signal pattern recognition technology are proposed and analysed. The vibration signal is detected in accordance with the theory of M-Z interference, and the position of the signal is determined by the two-way time delay technology. Different mathematical methods are used to analyse the optical fiber vibration signals, and the character of vibration signal generated by different events information is found. Then, MATLAB is employed for simulation analysis. The characteristic parameters of excavators, moving vehicles and personnel movement could be found through the analysis of the simulation system to distinguish the three different types of events.