The oil or gas station is an important producing unit, building a perimeter security system is an available method for protecting the stations and improving the capacity of dealing with the emergency incident. However, building high walls or fence and patrolling the stations are the main protecting methods, it is difficult to detect invasion immediately. So, it is necessary to construct a stable and reliable perimeter security system to protect the station. Traditional fiber perimeter security technology protects the station by sensing fiber on the fence or wall, but the wind will produce many false alarms. In this paper, a multi-mode sensing cable buried in the ground, systems can not only effectively detect intrusions, but more importantly, avoid false alarms by wind disturbance. Intrusions will produce non-stationary random signals, through the signal processing and recognizing technique, we can identify the invasion and improve the accuracy and stability of the system.

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