Safety evaluation of radio frequency electromagnetic exposure from wireless communication system of subway

Wenying ZHOU; Mai LU

doi:10.11889/j.1000-3436.2018.rrj.36.040501

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Safety evaluation of radio frequency electromagnetic exposure from wireless communication system of subway

RADIATION PROTECTION | 更新时间：2021-12-10

- Safety evaluation of radio frequency electromagnetic exposure from wireless communication system of subway
- Journal of Radiation Research and Radiation Processing Vol. 36, Issue 4, (2018)
- 作者机构：
  
  1.兰州交通大学光电技术与智能控制教育部重点实验室兰州 730070
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(61701208);National Nature Science Foundation of China(51567015);Lanzhou Jiaotong University Fund for Distinguished Young Scholars(2015036)
- DOI：10.11889/j.1000-3436.2018.rrj.36.040501
  CLC：
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Wenying ZHOU, Mai LU. Safety evaluation of radio frequency electromagnetic exposure from wireless communication system of subway. [J]. Journal of Radiation Research and Radiation Processing 36(4):040601-9(2018)
DOI：

Wenying ZHOU, Mai LU. Safety evaluation of radio frequency electromagnetic exposure from wireless communication system of subway. [J]. Journal of Radiation Research and Radiation Processing 36(4):040601-9(2018) DOI： 10.11889/j.1000-3436.2018.rrj.36.040501.

摘要

为了研究在地铁专用无线通信系统天线辐射下地铁司机射频电磁暴露的安全性，基于高频结构仿真软件（High frequency structure simulator，HFSS）构建该系统天线辐射下的地铁司机室射频电磁环境模型，模拟司机室内电场强度的分布范围为0.005~0.118V/m。运用电场强度分析仪对地铁司机室内射频电磁环境进行实地测量，测得专用无线系统天线信号的功率电平为-54.91~-30.22 dBm，对应的电场强度分布范围是0.006~0.109 V/m，与电场强度的模拟结果基本一致，验证了利用HFSS软件的计算可靠性。在此基础上分别模拟地铁司机站姿人体模型和坐姿人体模型的射频电磁暴露情况。仿真结果表明：司机坐姿和站姿人体模型中平均比吸收率峰值分别为3.838 3×10,-7, W/kg和3.118 7×10,-7,W/kg；电场强度峰值分别为0.12 V/m和0.11 V/m；磁场强度峰值分别为7.586 8×10,-4, A/m和7.276 7×10,-4,A/m。模拟结果均低于由国际非电离辐射防护委员会制定的职业电磁暴露限值，说明在该射频电磁环境中地铁司机职业电磁暴露处于安全范围内。

Abstract

To study the radio frequency electromagnetic exposure security of a driver from the subway wireless communication system, the subway cab's RF electromagnetic environment model was established, which was radiated by the antennas of the wireless communication system using a three-dimensional high frequency structure simulator (HFSS). The simulated results of electric field strength distribution in the driver's cab were between 0.005 and 0.118 V/m. The power level of the wireless communication system antenna's signal was measured to be between -54.91 and -30.22 dBm using the electric field strength analyzer, and the electric field intensity in the subway driver's cab was estimated to be in the range of 0.006~0.109 V/m, which is consistent with the simulation results. Thus, the computational reliability of the HFSS electromagnetic simulation software was verified. The absorbed dose in the electromagnetic environment was simulated separately for the standing and sitting posture of the driver's human model on the above basis. The simulation results showed that the peak values of the average specific absorption rate for sitting posture and standing posture were 3.838 3×10,-7, W/kg and 3.118 7×10,-7,W/kg respectively; peak values of electric field intensity for sitting and standing posture were calculated to be 0.12 V/m and 0.11V/m respectively; the peak values of magnetic field strength for sitting posture and standing posture were respectively 7.586 8×10,-4,A/m and 7.276 7×10,-4, A/m. The results obtained for the various peak values were all within the electromagnetic occupational exposure restriction limit, created by the International Commission on Non-Ionizing Radiation Protection(ICNIRP). Thus, this investigation demonstrated that the RF electromagnetic radiation environment in the subway cab was indeed safe for the driver.

关键词

专用无线通信系统天线高频结构仿真软件地铁射频电磁辐射司机职业电磁暴露

Keywords

Antenna of wireless communication systemHigh frequency structure simulatorRadio frequency electromagnetic radiation of subwayOccupational electromagnetic exposure of subway driver

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