Reducing False Alarms Caused by Wind Effect in Automatic Security Perimeter System

False alarms due to wind effect on the perimeter security system need to be reduced. Sensor cables are fastened to existing security fences. Main problem of the system is a false alarms generated by the strong wind. Input signals receiving from sensor cables are processed and analyzed by using the DSP (TMS320F2812) microcontroller. The system collects signal amplitude, duration time and frequency spectrum to distinguish the wind effect from intrusion signal. The result gives the real or false alarm. Frequency analysis was done for each duration of N=128 samples of input signal was using special algorithm of the fast Fourier transform through DSP microcontroller. The security system has been tested at border lines of Mongolia. A detection rate after apply the developed algorithm for reducing false alarms was improved up to 94%~95% of enough accuracy for real field application.