基于车载移动的区域射频电磁辐射监测方法比较研究

Comparative study on monitoring methods for regional radio-frequency electromagnetic radiation based on vehicle-mounted mobile

本文以江苏省南通市为例,分别采用车载移动法和国标法对城区射频电磁环境进行现场实测,共获取有效测试数据20 250个,其中移动法20 060个,国标法190个。比较分析结果表明:(1)两种方法单点比对监测结果相对偏差小于±10%;(2)两种方法所监测的南通城区环境射频电磁辐射平均综合电场强度分别为(0.58±0.28)V/m和(0.52±0.32)V/m,无明显差别,但在典型性和代表性表征上车载移动法明显优于国标法;(3)研究发现港闸区域50 Hz极低频高压输电线路沿路密集架设是车载移动法测值偏高的主要原因,可通过优化行驶路线避开高压线和后期数据处理等方法消除此类影响。本研究结果将有助于推动车载移动法国家监测技术规范的出台,并为在全国范围内推广应用提供了示范借鉴。

Compared with the national standard method,the drive-test method is new and more convenient with more representative results and wider applicability in radio-frequency electromagnetic radiation monitoring. In this study,tests on urban radio-frequency electromagnetic radiation were carried out in Nantong,Jiangsu by both the vehicle-mounted mobile monitoring method and the national standard method. Among 20 250 valid test data obtained,20 060 were by the drive-test method and 190 by the national standard method. The relative deviation of the monitoring results for the two methods ranged from 1. 64% —7. 77%,less than 10%. The average broad band electric fields for the two methods were 0. 58 ± 0. 28 V/m and 0. 52 ± 0. 32 V/m,respectively,with no obvious difference between the two methods. Whereas in the respect of the typical characteristics and representativeness,the drive-test method was significantly better than the national standard method. The study also found that the dense distribution of 50 Hz extremely-low-frequency high voltage transmission lines along the streets was the main reason for the higher values in the drive-test method. This influence could be eliminated by optimizing the driving route to avoid high voltage transmission lines and by data processing. The results of this study could facilitate the establishment of the national regulation concerning the drive-test method and provide a model for its national promotion and application.