不同环境条件下射频电磁污染的时空分布研究

【作者】 张莉；

【导师】 张邦俊；

【作者基本信息】 浙江大学 ， 环境科学， 2003， 硕士

【摘要】 为了解射频电磁污染现状，本文从分析射频电磁场的科学特性出发，着重研究和探讨日常环境中射频电磁辐射的时空分布特征以及各种环境条件对场强的影响程度，这些研究工作为今后更加深入和全面地研究环境电磁污染问题提供基础资料。 论文不仅对城市电磁辐射功能区划分进行分析，还着重研究典型射频污染源(如以移动基站为代表的移动通信设备、以广播电视塔为代表的广播发射设备和以计算机显示终端为代表的办公设备)射频电磁场的时空分布特性，以及在一些常见地面条件下针对同一污染源其射频电磁场的空间分布。研究结果表明：在有植物的地面条件中，电磁场强的衰减量比较明显，而温度、湿度对射频电磁场的影响不明显；移动基站近距离射频电磁场随时间呈明显的波动性；广播发射塔周围的射频电磁场随与发射源之间距离的减小而增大；计算机显示终端周围射频电磁场随距离迅速衰减，但以上各污染源周围射频电场强度值均低于国家标准值。更多还原

【Abstract】 For completely understand of the present contaminative condition of the radio frequency electromagnetism, this text with deeply into the points from the analysis radio frequency electromagnetism field for space and time distribution characteristic, put great emphasis on the research with studying the daily life the radio frequency in the environment. So that ,the paper is focus on not only in electromagnetic radiation pollution of radio frequency in urban different function region ,but also in distribution characteristic of important polluted resources,such as mobile phone base station, the device of broadcast and the computer displays.The research result showes that ,in the cover of the plant , electromagnetism field values reduce obviously; the influence of the temperature and the degree of humidity for electromagnetism field power values is not obvious; the values of electromagnetism fields power vary by the time around the mobile-base stations; the values of elelctromagntism field power of broadcast tower obviously appear increased by the distance decreasing; and the electromagnetism field around the computer display reduce quickly.In a word,the electromagneitsm field values arround every kind polluting resource are all lower than the national standard values. This research will establish a base for the further study in environmental electromagnetic radiation pollution in the future days.更多还原