基于FBG准分布式光纤智能周界警戒系统

设计了一种基于多个串联FBG传感元直接成缆的大面积、长距离智能周界警戒技术。建立了8路时分、13路波分复用实验系统,在此基础上实现了探测距离大于1 km、定位精度为10 m、波长解调精度为0.01 nm的智能警戒。同时,该系统具有成本低、FBG传感元数量多、告警定位精确、告警灵敏度高、布放灵活及易于复用拓展等特点。现场实验证明,该系统能够完成不同入侵模式的判断,可以用于周界警戒。

Analysis of a FBG sensing system with transverse uniform press by using genetic algorithm

An analytical method in a quasi-static fiber grating sensing system under transverse uniform press is proposed based on genetic algorithm The effect of population size, generations, crossover ratio and mutation ratio to genetic algorithm, and the optimization parameters of genetic algorithm were given. The relevant experimental system is constructed. The simulation and experiments show that the analytical method proposed can be applied to analyze the reflective spectra of the quasistatic FBG sensing system at transverse uniform press, the strain measurement with high-precision of 0.91% can be realized