基于光纤传感网络的区域报警监测系统设计  

Design of regional alarm monitoring system based on optical fiber sensing network

作　　者：余员琴 余修武[2] 陈海文 陈芳 YU Yuanqin;YU Xiuwu;CHEN Haiwen;CHEN Fang(Schoolof Electrical and Information Engineering, Hunan Institute of Transportation Engineering, Hengyang Hunan 421001 ,China;Nanhua University, Hengyang Hunan 421001 ,China)

机构地区：[1]湖南交通工程学院电气与信息工程学院,湖南衡阳421001 [2]南华大学,湖南衡阳421001

出　　处：《激光杂志》2019年第4期102-107,共6页Laser Journal

基　　金：江西省自然科学基金(No.20122BAB201050);江西省科持厅科技支撑项目(No.20121BBG70065);江西省教育厅科技项目(No.GJJ12667)

摘　　要：传统基于应变传递理论的区域报警监测系统,通过应变传递系数与测量允许误差的关系,得到满足工程测试精度要求的传感器最佳取值,依据该值实现区域报警监测,没有考虑时间延迟对于报警实时性的影响,存在时延高、效率差的弊端。设计基于光纤传感网络的预期报警监测系统,系统硬件由光纤传感器、二次仪表以及控制单元等构成;通过光纤传感器将光信号转换为可用信号,确定被测参数;采用ATMEGA162单片机为控制单元的微控制器控制硬件系统的运行。系统软件利用WG加权方法增强时延估计的准确度,提升系统报警的实时性。仿真实验证明,所设计系统进行起火点监测时的总平均误差为1. 025 cm,最短报警时间为3. 52 s,资源调度阻塞率相对较低,平均传输速度为16. 20 byte/s,说明所设计系统具有较高的区域报警能力。The traditional regional alarm monitoring system based on strain transfer theory has obtained the optimal value of sensors that meet the requirements of engineering test accuracy through the relationship between strain transfer coefficient and measurement allowed error, and realizes regional alarm monitoring based on this value. The effect of time delay on the real time of alarm is not considered. The system includes optical fiber sensor, secondary instrument and control unit. The optical signal is converted into usable signal by optical fiber sensor to determine the parameters to be measured;ATMEGA162 microcontroller is used to control the operation of the hardware system. The system software enhances the accuracy of delay estimation by using the WG weighted method to improve the real-time alarm. The simulation results show that the system has a total average error of 1. 025 cm, a minimum alarm time of 3. 52 s, a relatively low congestion rate of resource scheduling, and an average transmission speed of 16. 20 byte/s. It shows that the designed system has a high regional alarm capability.

关 键 词：光纤 传感网络 区域 报警监测 光信号 WG加权 

分 类 号：TN212.1[电子电信—物理电子学]