Portable X/gamma-ray survey meter based on the Internet of Things network for measuring the environmental radiation distribution

In this study, we developed a portable X/gamma-ray survey meter for large-scale distributed real-time monitoring of the ambient dose equivalent rate in the surrounding environment, using a silicon photomultiplier coupled with a CsI(Tl) scintillator. This innovation is integrated into an Internet of Things (IoT) network. The device realizes a wide range of dose rate measurements by switching the frequency of a pulse-frequency modulation (PFM) -type DC-DC power supply mode. The energy response is improved through Geant4 simulation and multicomparator design. The energy response of the survey meter ranges from 48 keV to 1.3 MeV, encompassing common protection level applications. It effectively measures gamma radiation dose rates ranging between 0.1 uSv/h and 100 mSv/h for Co-60. Temperature compensation of the detector was achieved through a series of experiments; the meter exhibits a deviation of -25% to +25% at temperatures between -40 and +40℃. 

本研究针对周边环境周围剂量当量率的大规模分布式实时监测需求，研制了一款便携式X/γ射线巡测仪，其采用硅光电倍增管（silicon photomultiplier）与碘化铯(Tl)（CsI(Tl)）闪烁体进行耦合探测。该装置已集成至物联网（Internet of Things，IoT）网络中。通过切换脉冲频率调制（pulse-frequency modulation，PFM）型直流-直流电源的工作频率，实现了宽量程剂量率测量。借助Geant4模拟与多比较器设计优化了仪器的能量响应特性，该巡测仪的能量响应范围为48 keV至1.3 MeV，可覆盖常规辐射防护应用场景。针对钴-60（Co-60）源，该仪器可有效测量0.1 μSv/h至100 mSv/h区间内的γ辐射剂量率。通过多组实验完成了探测器的温度补偿，在-40℃至+40℃的温度区间内，仪器测量偏差处于-25%至+25%范围内。

搜集汇总

背景与挑战

背景概述

该数据集描述了一种基于物联网网络的便携式X/γ射线测量仪，用于环境辐射分布的大范围实时监测。设备采用硅光电倍增管和CsI(Tl)闪烁体，能量响应范围为48 keV至1.3 MeV，可测量Co-60的γ辐射剂量率从0.1 uSv/h到100 mSv/h，并在宽温度范围内通过温度补偿实现稳定性能。