Aiming at characteristics of nonlinear

nonstationary and intermittent of signal acquired by fiber security perimeter system

give a framing method for invasive vibrant-signal. Embedding dimension number calculation method is used to determine the minimum framing length

in condition of keeping inherent dynamics characteristics of time sequence signal. Use two conditions

which are short-time energy and short-time average zero-crossing rate to judge and recognize vibration signal. After wavelet decomposition

compare energy distribution character of wavelet coefficients of each layer

reduce rate of error recognition of intrusion vibration signal through two levels of identification. Experimental results show that

the method is feasible and effective

it can accurately identify invasion vibration signal.