基于LoRa的γ辐射监测系统设计及应用  

Design and application of gamma radiation monitoring system based on LoRa

作　　者：张迪[1] 程懋松[2,3] 戴志敏 施成龙[1] ZHANG Di;CHENG Maosong;DAI Zhimin;SHI Chenglong(University of Shanghai Science and Technology,Shanghai 200093,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]上海理工大学,上海200093 [2]中国科学院上海应用物理研究所,上海201800 [3]中国科学院大学,北京100049

出　　处：《核技术》2023年第9期37-46,共10页Nuclear Techniques

摘　　要：核能科学与技术和人们的生活联系紧密,但同时核辐射也可能危害人们的身体健康,因此需要加强对核辐射的监测。有线核辐射监测系统布线复杂、施工周期长、成本较高,且移动性差、故障排查较为困难。为了满足便捷测量γ辐射环境的需求,基于LoRa无线通信技术,设计了γ辐射监测系统。该系统的主要功能包括数据采集、数据处理及数据传输,采用硅光电倍增管(Silicon Photomultiplier,SiPM)闪烁体探测器进行数据采集,STM32单片机作为核心处理器对采集的数据进行处理、打包,由LoRa无线通信模块进行数据传输。针对可能存在的因复杂电磁环境、传输距离等因素导致监测系统断线及数据传输频繁时造成的区域内信道拥堵问题,设计了动态最优路径通讯算法,通过筛选中继节点,寻找最优重连路径以及实现数据发送的优先级分配。实际测试结果表明:闪烁体探测器测试辐射数据结果可靠,且基于LoRa的γ辐射监测系统数据传输稳定性达到99.57%以上。该系统具有组网灵活、传输距离远、成本低、拓展性强等优点,具有广泛的应用前景。[Background]Nuclear science and technology are closely related to the lives of people.However,nuclear radiation may harm the health of the general public;hence,nuclear radiation monitoring must be strengthened.A wired nuclear radiation monitoring system has the characteristics of complex wiring,a long construction period,high cost,poor mobility,and more difficult troubleshooting.[Purpose]This study aims to address the demand for convenient measurement and monitoring of gamma radiation fields.[Methods]Based on the LoRa wireless communication technology,aγradiation monitoring system using silicon photomultiplier(SiPM)tube-scintillator detector was designed.The main functions of the system included data collection from the detector,data processing and transmission using a STM32 single-core processor.The collected data packaging and transmission were processed in STM32 microcontroller using the LoRa wireless communication module.Considering the possible channel congestion in the monitoring system and the frequent data transmission,a dynamic optimal path communication algorithm was designed to find the optimal reconnection path and realize the priority allocation of data transmission.[Results&Conclusions]The test results show that the data transmission stability ofγradiation monitoring system based on LoRa is higher than 99.57%,and has the advantages of flexible networking,a further distance of transmission,low cost,and substantial expansion,hence has a broad reference prospect.

关 键 词：SIPM Γ辐射 核辐射监测 LoRa无线通信 

分 类 号：TL812[核科学技术—核技术及应用]