Analysis Of Electromagnetic Radiation Environment In Beijing Typical Area

With the development of high technology, high strength electromagneticradiation has reached degree of straight threatening to human health. .To realizesituation of environmental pollution sources and analyze their developing trend, hasvery important meaning for prevention and management of electromagnetic radiationin the future. This paper theoretically calculated electromagnetic environment of high voltagetransmission lines and medium wave transmitting tower, and practically measured.According to result of theoretical calculation and measure, we can draw theconclusion: 1. According to analysis of theoretical calculation and practical measure, electric field is determined by vertical field strength; but magnetic field is decided by vertical field strength and horizontal field strength nearby the ground. 2. For electromagnetic field distribution of single-circuit high voltage transmission lines, conductor should adopt triangle arrange, reduce conductor numbers and phase space of subconductor, that is able to reduce field strength value. For double-circuit high voltage transmission lines, conductor adopt adverse phase order arrange, minish distance of phase space, reduce conductor numbers and phase space of subconductor, that can reduce field strength value. 3. Electric field strength distribution around medium wave transmitting tower will increase with height increasing of floor. Moreover, field strength is max on top of the building, commonly less than 0.1V/m in the room. These results have instructing meaning for future practical building. At the same time, we measured and analyzed other kinds of electromagneticradiation, such as transformer substation, medical equipment, mobile telephone,microwave oven and so on. Furthermore, we knew harm of home appliances andmobile telephones that closely touch with human life. According to measuring result,combined with limited value of assessment standard, we assessed field strengthvalue, and offered to a few of preventible measure and advice. II摘 要 Through research of this paper, human has a specific understanding forelectromagnetic radiation, and can adopt relevant depend measure for someequipments arising electromagnetic radiation, avoid something what people don'twant to see. Therefore, it has realizable meaning.