Design And Implementation Of Online Monitoring System For Radioactive Sources Based On Internet Of Things

With the development of nuclear science and technology in China,various radioactive sources are widely used in industrial flaw detection,medical diagnosis,radiation breeding and other fields.While these radioactive sources make contributions to mankind,they also bring a certain degree of safety hazards.Therefore,the safety monitoring and management of radioactive sources must be considered,and real-time monitoring of radioactive source storage and application sites of radioactive sources must be carried out to prevent relevant personnel from being injured by radiation.In this environment,this article starts with radiation monitoring,combines the Internet of Things technology and Internet technology to design an online radioactive source monitoring system.The system can be divided into two major subsystems,the lower monitoring node subsystem and the upper cloud server subsystem.The monitoring node subsystem realizes the control of radiation data acquisition,processing and corresponding modules.This article uses STM32 as the main control module and GM counter tube as the radiation detector.The high-voltage circuit drive and signal processing circuit provide the main control chip with appropriate pulse signals to facilitate the main control chip to count.In addition,when calibrating the GM counter tube,a high-order segmented fitting method based on the least squares method is adopted,which can achieve the best fit in the range of different count rates and improve the accuracy of radiation detection.Then,combined with external equipment such as the positioning module,a monitoring node that integrates radiation detection,positioning and alarm functions is realized,and finally the data collected by the node is sent to the server through the 4G module,and the server displays,summarizes and stores the data.On the one hand,the upper cloud server subsystem needs to receive and store the monitoring node data,on the other hand,it needs to process and respond to client requests.In this paper,the server adopts efficient B/S mode,completes the design of the database and various functional interfaces,and uses AJAX technology to realize the timing refresh of the web page and the asynchronous communication functions of the front and back ends.The user can grasp the operation of the field equipment in real time through the Web interface.,So as to achieve the purpose of radiation safety supervision.This paper has designed and achieved the above-mentioned radio-active source monitoring system,Compared with the traditional monitoring system,the system witch designed in this paper has many improvement such as micro-type,long-distance dose-monitoring,threshold alarm,real-time positioning,etc.The system can satisfy the new requirements for radiation monitoring witch has clear market cap and wide prospects of application.