基于光纤Bragg光栅传感器阵列的智能周界安防系统

为了克服现有技术存在分辨率低、监测距离有限、价格昂贵等特点,提出了一种基于光纤布拉格光栅传感器(FBGS)阵列技术的周界入侵行为感知增敏方法及系统.采用全同光栅阵列技术提高系统复用能力,使得相同长度防区内传感器数量成倍增加,从而大大提高了系统感知外界入侵行为的灵敏度;采用特殊的传感器封装工艺和敷设方法进一步提高了系统感知外界微小振动灵敏度;结合时域、频域分析方法智能识别外界入侵行为,降低系统误报率.相比传统光纤光栅周界防入侵技术,系统具有米(m)级空间分辨率、误报率极低、监测距离更长、性价比高等特点.

Intelligent perimeter security system based on FBGS array technology

In order to overcome the problems of existing technology of low resolution,limited mornitoring distance and high price,provide behaviors of perimeter intrusion sensing technology and system sensitivity enhancement method based on fiber Bragg grating sensor (FBGS) array . Using the whole grating array technology to improve the multiplexing capacity of system,the number of the same length zone sensor increases exponentially,thus greatly improves the sensitivity of the system to perceive the external intrusion. The sensitivity of the system is further improved by adopting special package and laying technology. Combining the time domain and frequency domain analysis methods,the system can intelligently identify the outside intrusion behavior,and the false positive rate is decreased. Compared with the traditional fiber grating perimeter anti intrusion technology,the system has the characteristics of m class space resolution,low false positive rate,long monitoring distance and high cost performance.