泄漏电缆周界入侵信号检测方法及仿真研究

泄漏电缆周界入侵防盗报警是目前应用最广、发展前景十分良好的一种方法和技术,以往皆采用FFT法对入侵信号进行探测,无法进一步提高入侵信号的检测率.针对泄漏电缆周界入侵是一种典型的非周期随机信号,从理论上对比分析了四种典型的时频分析方法,同时对周期信号和非周期随机信号进行了两种时频分析方法的仿真研究.理论分析与仿真结果表明,HHT变换是最适用于泄漏电缆周界入侵信号的检测方法.

Leakage cable perimeter intrusion detection method and its simulation

In currently, leakage cable perimeter intrusion alarm is a kind of methods and techniques which is most widely used and the development prospect is very good. In the past, FFTmethod was adopted for all the invading signal detection, hardly improved intrusion detection rate of the signal. In allusion to leakage cable perimeter intrusion is a kind typical of aperiodic stochastic signal, compared the four typical time-frequency analysis methods in theoretically analysis, at the same time, carried the simulation research on two kinds of time-frequency analysis method in periodic signal and aperiodic stochastic signal. The theoretical analysis and simulation results show that the HHT transform is the most suitable for leakage cable perimeter intrusion signal detection method.