本文選題：中波臺 + 電磁輻射�。� 參考：《內(nèi)蒙古大學》2016年碩士論文

【摘要】：隨著社會經(jīng)濟發(fā)展和城市化進程持續(xù)加快,原本建于城市邊緣的中波臺被城區(qū)所包圍。而中波發(fā)射設備因發(fā)射功率和發(fā)射原理等原因,導致周邊電磁輻射水平較高,在靠近中波發(fā)射天線的區(qū)域電場強度甚至有可能超過國家標準《電磁環(huán)境控制限值》(GB8702-2014)的規(guī)定。本文以內(nèi)蒙古西部某市某中波臺為研究樣本,在其各設備正常運行期間對各發(fā)射天線(塔)和中波臺周邊環(huán)境保護目標進行電磁輻射現(xiàn)狀測量,布設了330個測量點位獲取了1650個數(shù)據(jù),根據(jù)數(shù)據(jù)分析中波臺附近區(qū)域距離與電場強度的趨勢關系,得出以下結論：(1)中波發(fā)射塔周邊區(qū)域電場強度隨著與發(fā)射塔距離的增加而迅速衰減,7m后電場強度值均低于中波的公眾曝露控制限值40V/m。(2)超短波廣播發(fā)射塔電場強度值隨距離的增加整體也呈遞減趨勢,500m范圍內(nèi)電場強度值低于公眾曝露控制限值(12V/m)。(3)正常運行時,發(fā)射機房內(nèi)部分操作位置電場強度超出《電磁環(huán)境控制限值》(GB 8702-2014)規(guī)定的公眾曝露控制限值；控制室內(nèi)部分位置電場強度較高。(4)現(xiàn)中波臺廠界外最近的環(huán)境保護目標電場強度值在(0.8-1.1)V/m間,遠低于《電磁環(huán)境控制限值》的規(guī)定限值。(5)根據(jù)對中波和超短波發(fā)射天線場強疊加理論預測結果,該中波臺規(guī)劃搬遷后,距發(fā)射塔水平500m以外電磁輻射滿足環(huán)保要求,從環(huán)境防護距離來看,500m防護距離,可滿足要求。本研究可為環(huán)保部門今后對中波臺的監(jiān)督管理提供可靠的數(shù)據(jù)依據(jù),同時以數(shù)據(jù)為依據(jù)消除公眾對中波臺電磁輻射影響的恐慌心理。
[Abstract]:With the rapid development of social economy and urbanization, the middle wave platform built on the edge of the city is surrounded by the urban area. Due to the transmission power and emission principle, the electromagnetic radiation level of the medium wave transmitting equipment is high, and the electric field intensity in the area near the medium wave transmitting antenna may exceed the national standard "electromagnetic environment control limit" (GB8702-2014). Taking a medium wave station in a city in the west of Inner Mongolia as the research sample, the electromagnetic radiation status of each transmitting antenna (tower) and environmental protection target around the medium wave station is measured during the normal operation of each equipment. 1650 data were obtained by setting 330 measuring points. According to the data, the trend relationship between the distance near the middle wave station and the electric field intensity was analyzed. The following conclusion is drawn: (1) the electric field intensity of the area around the medium wave transmitting tower decreases rapidly with the increase of distance from the tower to the transmitting tower. After 7 m, the electric field intensity is lower than the public exposure control limit of 40 V / m. 2) the electric field intensity of the ultrashort wave broadcasting tower is lower than that of the medium wave transmission tower. The electric field intensity in the range of 500m is lower than that of the public exposure control limit (12V / m) when the electric field intensity is lower than that of the public exposure control limit (12V / m ~ (3)) when the value increases with the increase of the distance. The electric field intensity of some operating position in the launching machine room exceeds the public exposure control limit specified in < electromagnetic environment control limit value > GB8702-2014); The electric field intensity of the part of the control room is relatively high.) at present, the nearest target electric field intensity of environmental protection outside the middle wave station factory is between 0.8-1.1 V / m, According to the prediction results of field strength superposition theory of medium wave and ultrashort wave transmitting antennas, the electromagnetic radiation beyond 500m from the transmitting tower level can meet the environmental protection requirements after the planned relocation of the medium wave station. According to the distance of environmental protection, the distance of 500 m protection can meet the requirements. This study can provide reliable data basis for environmental protection department to supervise and manage the medium wave station in the future, and at the same time, it can eliminate the public panic about the electromagnetic radiation influence of the medium wave station on the basis of the data.
【學位授予單位】：內(nèi)蒙古大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TN934.8

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