PM2.5放射性气溶胶模拟测量平台

发布时间：2018-04-14 19:55

本文选题：PM2.5 + 放射性气体　；参考：《东华理工大学》2017年硕士论文

【摘要】：随着我国工业的快速发展,雾霾天气频繁出现在一些城市群中。构成雾霾的可吸入性颗粒(PM2.5)对人体健康影响很大,其形成放射性气溶胶被人体吸入后在人体肺部产生持续的照射,导致人体组织产生病变。然而,放射性气溶胶的危害并没有引起人们的重视。目前尚没有对PM2.5放射性气溶胶的形成机理及影响因素进行系统的研究。本文详细介绍了对放射性气溶胶的研究现状并对国内外放射性气溶胶的研究方法进行了分析,对比了不同种类放射性气体的危害程度。在此基础上提出了采用Rn作为放射性气溶胶的研究对象。通过对放射性气溶胶的形成过程的分析和介绍,提出了PM2.5放射性气溶胶测量平台的整体设计方案并对系统中的氡浓度控制系统、氡及氡子体浓度监控系统、温湿度控制系统、气溶胶监测系统进行了理论分析和介绍。根据系统功能要求对测量平台系统各组成部分的实现原理进行了详细的理论分析并给出了具体设计过程。利用SMPS粒径分析仪对研制的气溶胶发生器的性能进行了测试。根据系统理论设计在STM32平台上对各组成部分进行硬件实现。利用C++语言实现测量平台控制系统。在STM32平台上实现PM2.5放射性气溶胶模拟测量平台,对测量平台系统的各项性能进行测试。测试结果表明:所搭建的放射性气溶胶测量平台能够准确的控制氡箱内的温湿度,并且在低、中、高氡浓度下稳定的控制氡箱内的氡浓度,研制的气溶胶发生器能产生不同粒径的气溶胶,并且重复性良好,均能达到预期的效果。本文的设计结果为探究PM2.5放射性气溶胶的形成机理及影响因素提供了一套稳定的硬件平台。
[Abstract]:With the rapid development of industry in China, haze weather frequently appears in some urban agglomerations.PM2.5), an inhalable particle that constitutes haze, has a great impact on human health. The formation of radioactive aerosols, which are inhaled by the human body, produces continuous irradiation in the human lungs, resulting in pathological changes in human tissues.However, the hazards of radioactive aerosols have not attracted much attention.There is no systematic study on the formation mechanism and influencing factors of PM2.5 radioactive aerosol.In this paper, the present research situation of radioactive aerosol is introduced in detail, the research methods of radioactive aerosol at home and abroad are analyzed, and the harm degree of different kinds of radioactive gas is compared.On this basis, we propose to use rn as the research object of radioactive aerosol.Based on the analysis and introduction of the formation process of radioactive aerosol, the overall design scheme of PM2.5 radioactive aerosol measurement platform is put forward, and the radon concentration control system, radon and radon daughter concentration monitoring system, temperature and humidity control system are presented.The aerosol monitoring system is analyzed and introduced theoretically.According to the functional requirements of the system, the realization principle of each component of the measurement platform is analyzed in detail and the design process is given.The performance of the developed aerosol generator was tested by SMPS particle size analyzer.According to the system theory, the hardware of each component is implemented on STM32 platform.C language is used to realize the control system of measuring platform.The PM2.5 radioactive aerosol simulation measurement platform is implemented on the STM32 platform, and the performance of the measurement platform system is tested.The test results show that the radioactive aerosol measurement platform can accurately control the temperature and humidity in the radon box, and control the radon concentration in the radon box stably at low, medium and high radon concentrations.The aerosol generator can produce aerosol of different size and has good reproducibility.The results of this paper provide a stable hardware platform for exploring the formation mechanism and influencing factors of PM2.5 radioactive aerosol.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X513;X84

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