The Design And Implementation Of Algorithm For Portable Nuclide Recognition Instrument

The portable nuclide recognition device can measure the radionuclides quickly,flexibly and conveniently.The development of the portable nuclide recognition device is of great significance to meet the market demand and develop the nuclear detection and measurement technology.Energy spectrum analysis and nuclide recognition are the core technologies of portable nuclide recognition instrument.This topic according to the characteristics of the portable nuclide identification device,instrument spectrum data,background deduction,smooth,peak energy scale,nuclide identification are analyzed and several key technologies such as research,the research content is as follows: in terms of energy spectrum data processing,studied the algorithm for portable nuclide identification device,including the characteristic peak extraction algorithm and nuclide identification algorithm,the characteristic peak extraction algorithm is mainly the spectrum signal preprocessing: Based on the analysis of gamma energy spectrum based on the forming principle,the traditional analysis method based on spectrum all-around peak information,analysis of the measured and simulated gamma energy spectrum,the first to use least-square smoothing in retain the original gamma spectrum peak under the most important feature,complete with noise spectrum smoothing noise,then through derivative peak method to find the gamma energy spectrum peak search,realize the energy spectrum feature extraction;The nuclide recognition algorithm is mainly based on the characteristic peak matching method to complete the qualitative analysis and realize the IAEA's requirements for identification of four kinds of nuclides required by portable gamma spectrometer.In terms of software development,c + + graphical user interface under Linux Qt application development framework,design the interface aesthetics,simple operation,portable nuclide identification software,starting from the features of portable nuclide identification device needed,the software is divided into line drawing,energy spectrum analysis,and file operations,communication module,energy calibration,parameter setting,help document several big modules.By testing the nuclide recognition algorithm and various functions of the software,the expected goal of the subject is achieved.