Design And Implementation Of Key Hardware And Control Logic Of Rotorcraft Airborne Radiation Monitoring System

In recent years,with the development of nuclear technology,it has been widely used in nuclear power generation,industry,agriculture,medicine,and so on.At the same time,the issue of nuclear safety has been a topic of concern.In order to improve the nuclear emergency capability after the accident,more novel and efficient nuclear radiation monitoring equipment is needed.In view of the defects of existing radiation detection equipment,the group give full play to the characteristics of aerospace discipline advantages,combining the traditional radiation detectors and small unmanned rotorcraft.A small unmanned rotorcraft airborne radiation monitoring system is developed.The paper focuses on the research of the key hardware circuit design,FPGA control logic design and system performance testing.(1)After the overall design scheme of the system is formulated,the system is divided into several parts,such as power supply module,GM dose rate module and data acquisition module,and so on.In the process of design,the key technologies such as the control of the power supply ripple,the design of the high voltage circuit and the anti-interference ability of the circuit are studied in detail.The test results show that the hardware circuit meets the design requirements.(2)Describes the overall system design logic based on FPGA,and the system is divided into dose rate module,sensor module and serial communication module and other modules,each module function,and some key problems in the design process are discussed.Several simulations are conducted,and the simulation results show that the control logic of the module is normal.Finally,the results of the PC interface show that the data can be collected and sent to the PC module successfully.(3)The principles and methods involved in the realization of the system function are introduced,and the accuracy of dose rate measurement is tested.The problems involved in the system sensitivity test are discussed,both simulations and experiments are conducted.Finally,the actual flight test is carried out,the results of the test show that the system can meet the design requirements.The research work of this paper is of great significance to the realization of the whole monitoring system.On the basis of the work in this paper,combined with the corresponding algorithm,and the performance of the system can be improved furtherly.The system can be used for the routine monitoring of the radiation or the searching for lost radioactive sources.