The Data Processing And Applying Of Radon Measurement By Activated Carbon Based On The Wavelet Analysis

Radon measurement by activated carbon is one static, accumulative method.Because of itseasy operation,anti-disturbing,high detection precision,in the past many years ,this method is developed rapidly and applied widely in many fields.But exploration results is influenced by Radioactive substance's own nature and survey environment, the data quality of active carbon measuring radon is hardly improved, which brings great difficulties to analysis data.Researched on the domestic and foreign theory of radon measurement and processing datas,firstly,the article presents the principle of radon measurement by carbon and the access method of spectra datas.Secondly, it summarise the factors affecting datas and the source of noise and presents some solutions to solve noise problems.Finally, the author introduces wavelet analysis algorithm in view of the research on the noise caused by Radioactive substance's Fluctuation and apparatus.Based on the comparison of the various denoising method,the author chooses polynomial fitting, Fourier analysis, five point sliding and Wavelet analysis to comparative analysis.Analysising the principle of denoising methods, the author writes the programs based on Matlab platform to achieve the purpose.We evaluates the degree of denoising result using the peak value, correlation and energy retention.The results shows that Wavelet analysis is more advanced than others.The measuring radon datas exists certain noise, the peak extracted from those datas influced by Radioactive substance's Fluctuation and apparatus.the suthor writes the programs based on Matlab platform to denosie respone matrix and establishes mathematics model. The datas of radon measurement by activated carbon is used to test the feasibility of the programs. the results shows that the method if feasible in practical. The achievement works the task of radon measurement by activated carbon in large area and processing and analysing datas,and is helpful to datas interpretation. Those are significant to the practical application of radon measurement by activated carbon.