The Development Of Walk-propelled Marine Radioactivity Detector

Mining large-scale exploitation of marine resources at the present stage, causingradioactive pollution of the marine environment has been improved, the human inmarine radioactive detection is more and more attention. Especially after the Japanesenuclear leakage, the abroad pay more attention to the study of marine radioactivedetection.Walk-propelled marine radioactivity detector but for content detection in theocean of uranium and thorium, potassium, but also can detect the content of artificialradionuclide, obtain radioactive pollution degree, marine diffusion range data, canalso study marine radioactive background scene is widely used in.Software of the subject completes Human-Computer interaction interface withWindows as development platform and C++as programming language. Meanwhile,in order to ensure the accuracy of the transmission, the subject makes RS-485serialport as the transport.The main topics include hardware circuit design, the hardware circuit debug,MCU and CPLD program, acquisition analysis software design and detector house-testing and practical application.Hardware circuit includes a power supply module, the analog module and thedigital module. Power module transforms supply voltage to the voltage of eachmodule requires. Analog section completes the acquisition signal amplification, peakhold and so on. The digital module completes analog-to-digital conversion, CPLD andMCU logic control sends data to data acquisition and analysis software.Data acquisition and analysis software completes interactive features with MCUand data acquisition functions, displays spectral data, smooth operation, peak searchoperation, peak area operation, and calculated content analysis operation. Due to thespecial circumstances of the marine surveying, software comes with GPS information collection module to achieve correspondence requirements of data and latitude andlongitude in one-to-one.The indoor measurements include underwater sealing measurement, stabilitymeasurements, the energy resolution measurement and measurement of energy linearrelationship. Field measurement application completes the beach-drag measurement,continuous measurement of underwater and underwater point-timed measurement inXiamen.