应用于物联网的光纤布里渊传感系统设计

The design of the optical fiber Brillouin sensing system applied to the internet of things

为了解决当前光纤布里渊传感系统存在的通信速度慢,抗干扰能力差等缺陷,设计一种应用于物联网的光纤布里渊传感系统。该系统包括感知层、传输层、支撑层和应用层AD模块、FPGA模块负责物联网散射信号处理,基于BOTDA技术设计光纤布里渊传感器采集结构完成信号采集;传感器根据采集的数据提取布里渊散射光频移信息,计算光纤布里渊频移与温度和应变关系,基于此系实现物联网的大功率广播检测,最后仿真测试结果表明,系统采集数据用时均值为9.41 ms,散射信号噪声消除程度可达97.36%。

In order to solve the problems of slow communication speed and poor anti-jamming ability of optical fiber Brillouin sensor system,an optical fiber Brillouin sensor system applied to the Internet of Things is designed.The system includes sensing layer,transmission layer,supporting layer and application layer AD module,and FPGA module,which are responsible for the scattering signal processing of the Internet of Things.Based on BOTDA technology,the optical fiber Brillouin sensor acquisition structure is designed to complete signal acquisition.The sensor extracts Brillouin scattering light frequency shift information from collected data,calculates the relationship between optical fiber Brillouin frequency shift and temperature and strain,and realizes the Internet of Things based on these above.Finally,the simulation results show that the average time used for data acquisition is 9.41 ms,and the noise elimination of scattering signal can reach 97.36%.