【摘要】 [目的]调查宝山区居民住宅工频电磁场的接触水平。[方法]选取160户居民住宅,分别测定每户住宅各房间不同部位在室内所有电器打开、关闭的状态下的工频电磁场强度。[结果]家用电器关闭时,距高压线100m以内的住宅工频电磁场强度均明显高于100m以外的住宅;家用电器打开时,距高压线100m以内、以外住宅工频电场强度无明显差别,距高压线100m以内住宅工频磁感应强度明显高于100m以外的住宅。无论家用电器开、关,居民住宅内工频电磁场强度均高于上海市环境电磁辐射本底值,但远远低于国家环保标准限值。同一房间内,工频电场强度房间中央高于床头,工频磁感应强度没有差别。[结论]目前住宅内工频电磁场强度较室外本底值有所升高,但均明显低于国内外相关标准所确定的限值。更多还原

【Abstract】 [Objective]To investigate residential power-frequency electromagnetic field exposure in Baoshan District, Shanghai.[Methods]A total of 160 residential households were selected and the intensity of power frequency electromagnetic field were recorded at various spots in residential households with household appliances on and off.[Results]In the state of appliances disconnected from power line,both the intensities of power-frequency electric field and the magnetic field in the houses within 100 m range to high voltage lines were significantly higher than those in the houses having more than 100 m gap to high voltage lines.Compared with the house beyond 100 m range to high voltage lines when appliances were on,there were no significant difference in the intensities of power-frequency electric field in the houses within beyond 100 m range to high voltage lines but the intensities of power-frequency magnetic field were significandy higher which suggested a distance-dependent manner.No matter the on/off state of the household appliances,the intensities of power-frequency electric field and magnetic field were both higher than the background electromagnetic radiation of Shanghai,although they were far below the limits of national standards.In addition,the intensities of power-frequency electric field at the center of the houses were higher than those off-center spots but no such pattern observed in the magnetic field measurement.[Conclusion]The residential power-frequency electromagnetic field levels in current study are higher than local background level and both far from the related national standards.更多还原