中低速磁浮交通与机场电磁安全防护距离研究

Research on the electromagnetic safety protection distance between medium and low speed Maglev traffic and airport

当中低速磁浮交通连接机场时,机场众多对电磁敏感的无线设施可能会受到中低速磁浮交通的电磁干扰影响.从理论分析和现场测试两个角度研究了中低速磁浮交通电磁辐射以及对机场无线设施的影响,提出了电磁安全防护距离的概念和计算方法.通过中低速磁浮电磁辐射理论值和测试值,对比机场无线设施的电磁环境要求,获得中低速磁浮交通与机场的电磁安全防护距离.研究表明:中低速磁浮对无方向信标台、超短波定向台、航向信标台、全向信标台、VHF通信系统等设施影响较大,在工程设计时,磁浮与机场的安全防护距离在百米以上.根据实测值,进一步得到了超短波定向台和测距仪台的电磁安全防护距离分别为89和2 m.本文提出的电磁安全防护距离可为中低速磁浮交通的工程建设提供支撑.

When the medium and low speed Maglev is connected to the airport,many wireless facilities sensitive to electromagnetic interference may be affected by the electromagnetic interference of the medium and low speed Maglev traffic.In this paper,the electromagnetic radiation of medium and low speed Maglev traffic and its influence on the airport wireless facilities are studied from two aspects of theoretical analysis and field test.The concept and calculation method of electromagnetic safety protection distance are proposed.By comparing the theoretical and test values of electromagnetic radiation of medium and low speed Maglev with the electromagnetic environment requirements of airport wireless facilities,the electromagnetic safety protection distance between medium and low speed Maglev traffic and airport is obtained.The research shows that the medium and low speed Maglev has great influence on the facilities such as directional beacon,ultrashort wave directional station,course beacon,omnidirectional beacon and VHF communication system.In engineering design,the safety protection distance between Maglev and airport is more than 100 m.According to the test values,the electromagnetic safety protection distances of the ultrashort wave directional station and the distance measuring station are 89 and 2 m respectively.The electromagnetic safety protection distance proposed in this paper can provide support for the construction of medium and low speed Maglev traffic.