FBG-based Study on Invasion of Intelligent Perimeter into Early Warning System
Sinopec Pipeline · Safety, Health & Environment · 2013
The system can fulfill network organization according to the characteristic of series-parallel connection and reuse by advantage of FBG vibrating sensor, realize the large-scale environmental perception and precise positioning; the behavior characteristic parameter is extracted by starting the analysis on short- time frequency spectrum of changing wavelength signal and the invasion position is precisely judged according to the behavioral relevance basis at the time of the unified response of many sensors, thus the high sensitivity and low false alarm rate is achieved. Many engineering application cases indicate that this FBG perimeter invasion alarm system has pattern recognition function, is not sensitive to the meteorological factors such as wind and rain. Its alarm accuracy rate is 100%; the response time is less than 3 s and spatial positioning accuracy is less than 10 m.