Rail Transit Radiation Monitoring System Design And Implementation

Urban rail transit station has the characteristics of relatively closed, the space is narrow, the nucleation occurred but material spread, will inevitably cause threat to large Numbers of people's health, at the same time easy to trigger a scare. Build nuclear material detection and warning system, to quickly identify the nucleation hazards, can effectively improve the level of rail traffic safety operation, enhance the level of emergency prediction, early warning and mitigation and avoid the secondary disaster.In this thesis by use of the Internet of things technology, designed and implemented the rail transit under special environment radiation monitoring and warning system. This article main research content is as follows:(1) combining the development trend of rail transit in rail transit, the possibility of the existence of nuclear radiation terrorist event, a comprehensive analysis of radiation monitoring business requirements, research at present, the application of the system has both as well as the existing problems, and the radiation PuJian design meet the rapid detection and alarm equipment system. System design including on-site detecting unit, control unit and data analysis on site and communication control software. Hardware part includes the scene detection unit and field control unit.(2) the demand for rail transit radiation monitoring system, studies the principle of radiation detection, analyzes the characteristics and scope of application of the scintillator, choose Nal (TI) and plastic scintillator related combination way of monitoring, and the detection unit of the power supply circuit and branch voltage circuit, signal processing unit, detection unit. For on-site technical requirements, design and development control unit based on ARM920T processor, implement related testing and detection circuit design, the scene with a quick and efficient data collection and analysis capabilities.(3) the design content includes the control unit software design of the software and PC software design, describes the function of the software components and the basic process. Through research field control unit using Linux as an embedded operating system, SQLite database to store the scene monitoring records, alarm linkage, the upper machine used for information and historical data query, and other functions.Through this study, the use of the Internet of things based on standard technical system, personnel orbit large passenger flow, the high concentration, fast, efficient radiation monitoring system through the case, through modern technology, improve the public transport safety environment, prevent destruction of the targeted rail transit, To guard against disposal experience get more extensive application. Also for the Internet of things technology application play an exemplary role in traffic safety, to promote the Internet of things intelligent transportation industry application.