Abstract
Perimeter security is the first line of defense to protect the important facilities and assets. The peripheral security technology and method of high performance can eliminate or reduce the threat from the outside world. In this paper, we design a high sensitivity vibration sensor applied to perimeter security based on the principle of FBG (fiber Bragg grating) vibration sensitivity. The sensor was tested by a demodulator OPD4000 for its sensitivity and frequency response. The frequency response range is from 5 to 80 Hz and acceleration of the FBG vibration sensor is over 1000pm/g. A phase generated carrier (PGC) demodulator based on an unbalanced Michelson interferometer was proposed. The vibration sensor and the demodulator are tested in the field and the experimental data are presented.
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