Perimeter security alarm system based on fiber Bragg grating
2010
With the development of the society and economy and the improvement of living standards, people need more and more
pressing security. Perimeter security alarm system is widely regarded as the first line of defense. A highly sensitive Fiber
Bragg grating (FBG) vibration sensor based on the theory of the string vibration, combined with neural network adaptive
dynamic programming algorithm for the perimeter security alarm system make the detection intelligently. Intelligent
information processing unit identify the true cause of the vibration of the invasion or the natural environment by
analyzing the frequency of vibration signals, energy, amplitude and duration. Compared with traditional perimeter
security alarm systems, such as infrared perimeter security system and electric fence system, FBG perimeter security
alarm system takes outdoor passive structures, free of electromagnetic interference, transmission distance through
optical fiber can be as long as 20 km It is able to detect the location of event within short period of time (high-speed
response, less than 3 second).This system can locate the fiber cable's breaking sites and alarm automatically if the cable
were be cut. And the system can prevent effectively the false alarm from small animals, birds, strong wind, scattering
things, snowfalls and vibration of sensor line itself. It can also be integrated into other security systems. This system can
be widely used in variety fields such as military bases, nuclear sites, airports, warehouses, prisons, residence community
etc. It will be a new force of perimeter security technology.
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