基于双Sagnac结构分布式光纤扰动传感的周界安防监测系统研究  

Research on Perimeter Security Monitoring System Based on Distributed Fiber Optic Disturbance Sensing with Dual Sagnac Structure

作　　者：滕飞 张丽 梁采惠 陈丽银 韦乐淇 TENG Fei;ZHANG Li;LIANG Cai-hui;CHEN Li-yin;WEI Le-qi(School of Physics and Electronic Engineering,Jiaying University,Meizhou 514015,China)

机构地区：[1]嘉应学院物理与电子工程学院,广东梅州514015

出　　处：《嘉应学院学报》2024年第6期18-22,共5页Journal of Jiaying University

基　　金：国家级大学生创新创业训练项目(202310582003);梅州市社会发展科技计划项目(2022B109)。

摘　　要：针对当前日常生活中存在的全天候、全方位、高效集中管控等周界安防需求,设计了一套基于双Sagnac结构的分布式光纤扰动传感系统.该系统利用双Sagnac结构建立光纤传感网络,以单一宽带光源和标准单模光纤为基础,搭配3×3光纤耦合器相位解调技术,通过分析时域上相位信号与扰动位置的比值实现精准定位,从而达到了稳定、灵敏、低成本和抗干扰的系统设计目标.实验结果表明,系统在10km的测试距离内,可灵敏感知外界扰动,实现了定位误差小于5m的精准扰动定位,为入侵行为的有效探测和防护提供了有力保证.Aiming at the perimeter security needs such as all-weather,omni-directional,and efficient centralized control that exist in the current daily life,a distributed fiber optic perturbation sensing system based on the dual Sagnac structure is designed in this study.This system utilizes the dual Sagnac structure to establish a fiber optic sensing network,based on a single broadband light source and standard single-mode fiber with 3×3 fiber coupler phase demodulation technology,and achieves accurate positioning by analyzing the ratio of the phase signal to the perturbation position in the time domain,thus achieving the system design goals of stability,sensitivity,low cost and anti-interference.The experimental results show that this system can sensitively perceive the external disturbance within the test distance of 10km and realize the accurate disturbance positioning with the positioning error less than 5m,which provides a strong guarantee for the effective detection and protection of intrusion behavior.

关 键 词：传感系统 扰动定位 双Sagnac结构传感系统 单模光纤 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]