基于重构背景二维K-S检验的有害入侵光纤预警

Harmful Intrusion Detection Method Based on Two-Dimensional K-S Test in Reconfigured Background for Optical Fiber Pre-Warning System

提出一种基于重构背景二维K-S检验的有害入侵光纤预警方法.利用有序统计量恒虚警率初步检测Ф-OTDR采集信号,筛选出入侵信号.为将有害入侵信号从筛选出的入侵信号中有效分离,对检测背景进行空域重构,使检测背景仅包含入侵信号.基于重构入侵背景中有害信号的空间幅度及时域间隔特性,设计了二维柯尔莫哥洛夫-斯米诺夫(K-S)检验方法来检测有害入侵信号.在实际的光纤入侵预警系统中,该方法主要应用于施工工地和过车公路等无害入侵较多的场景,能够有效地提取有害入侵信号.

A harmful intrusion detection method based on two-dimensional K-S test of reconfigured back- ground for optical fiber pre-warning system is proposed. Firstly,ordered statistics cfar （OS-CFAR） de- tection is used for preliminary examination of the measured signals by Ф-OTDR, and the intrusion sig- nals are selected. Next, the detecting background is reconfigured in the spatial domain for screening out the harmful intrusion signals. A method using two-dimensional K-S test to detect the harmful intrusion signals based on the time and space characteristics of the harmful intrusion signals in the reconfigured background is designed. In real optical fiber intrusion pre-warning system,this method is mainly applied in the conditions with more harmless intrusion such as construction site and highway, and it is effective in harmful signal collection.