某作业场所计算机超高频辐射和工频电场强度检测结果分析

Analysis on Ultra High Frequency Radiation and Power Frequency Electric Field Intensity of Computers in Workplace

目的掌握计算机电磁辐射强度分布情况,并对其强度进行分析和评价。方法采用电磁辐射分析仪和工频电磁辐射测量仪对10台台式计算机和5台笔记本电脑进行测量。结果台式计算机和笔记本电脑分别有5.0%(4/80)和60%(12/20)的检测点超过《工作场所有害因素职业接触限值第2部分物理因素》超高频辐射8 h接触限值要求。工频电场强度均符合标准。结论笔记本电脑高频电磁场强度处于较高水平,保持较远的操作距离和缩短接触时间,是减少非电离辐射的有效办法,建议完善计算机超高频辐射和工频电场标准。

Objective To measure ultra high frequency radiation and power frequency electric field intensity in different parts of computers,analyze and assess the distribution characters of electric field.Methods 10 computers and 5 notebook computers were measured by EMR-300 and ADL210A apparatus.Results Ultra high frequency radiation intensities of 5% of computers and 60% of notebook computers exceeded 8 hours exposure limits ruled by GBZ 2.2-2007.The power frequency electric field intensities met the 8 hours exposure limits.Conclusion Ultra high frequency radiation of notebook computers is in high level;keeping long operation instance and reducing exposure time are effective ways to reduce the intension of electric frequency.The exposure limits standards of electric frequency for computers should be established and improved.