Research On The Method Of Leakage Cable Perimeter Intrusion Signal Detection

With the increasing requirement in security precautionary technology, convenient,hidden, quickly perimeter intrusion system will play an important role in our daily life.Leaked cable perimeter intrusion prevention technology with its system stability, broadenvironment, susceptible to interference and so on unique advantages to maximally meet therequirements of the security technology, become one of the most widely used securitytechnology. Leakage cable perimeter intrusion detection technology is the top priority of theoptimization and improvement of signal detection system, but in the past, the intrusiondetection system process signal as periodic, unable to accurately express the intrusion signalinformation. This paper mainly research in view of signal detection ability for the perimeterintrusion signal detection system, in order to find the most suitable signal detection methodfor perimeter intrusion signal system.First of all, this paper introduce several kinds of typical non-stationary signaltime-frequency analysis methods, using different kinds of time-frequency method process agiven cycle signal, the processing results indicate that HHT transform using the method ofdecomposition makes up the defect of the cross terms, reflect the localization properties intime domain and frequency domain, The clustering and resolution of time-frequency graphaccurate expression the signal information time, amplitude, frequency, etc. The performanceof HHT is more suitable for signal detection than other time-frequency analysis methods.Extract actual intrusion signal from simulation system which copy DZ-10singlemulti-domain perimeter intrusion detection alarm system, analysis of several intrusion signal.Analysis actual signal using different kinds of time-frequency analysis method, the processingdata can be concluded that HHT time-frequency information will not only expression clearly,but also can express the detailed information on the instantaneous parameters, have the actualphysical significance, can achieve the purpose of optimization of perimeter intrusion signaldetection.