车载式选频测量(30 MHz~6 GHz)在城市电磁环境水平监测的应用

摘要/Abstract

摘要： 为更高效率、更准确的测量城市电磁环境水平,掌握电磁环境构成,使用与成都点阵科技公司联合研制的DZER100车载式快速选频测量系统对成都市温江区涌泉街道部分城市区域电磁环境水平进行测量。该系统在30 MHz~6 GHz 频段、100 kHz分辨率条件下,全频带扫描时间为300 ms,实现了行车速度60 km/h下测点间距5 m,可有效获取每个测量点位的场强总量、频谱及特定频段的电磁环境水平。5.3 km²区域测量得到有效点位数据14 393个,通过系统数据自动分析得到全区域电场强度平均值约1.23 V/m,0~2 V/m量级的占比达到了87.411%;占标率平均值为1.41%,占标率超过20%的点位仅为0.24%;通过频谱可视化分析功能,可快速掌握关注点位的频谱构成及关注频段的贡献量。车载式选频测量(30 MHz~6 GHz)可实现各点位场强总量和频谱的同时测量。

关键词: 车载式, 选频测量, 城市电磁环境水平, 监测

Abstract: Objective: To measure the level of urban electromagnetic environment more efficiently and accurately and master the composition of electromagnetic environment. Methods: The DZER100 vehicle-mounted fast frequency selection measurement system was developed jointly with Chengdu Dot Matrix Technology Co., LTD. The full-band scanning time of the system was 300 ms under the condition of 30 MHz-6 GHz frequency band and 100 kHz resolution. With a driving speed of 60 km/h and a distance of 5 m between measuring points, the total field intensity, spectrum and electromagnetic environment of specific frequency band of each measuring point can be effectively obtained. Results: 14 393 effective point data were obtained for 5.3 km² area. Through automatic analysis of system data, the average electric field intensity of the whole area was about 1.23 V/m, and the ratio of 0 V/m-2 V/m reached 87.411%. The average value of standard ratio was 1.41%, and only 0.24% of the sites accounted for more than 20%. Through the spectrum visualization analysis function, the spectrum composition of the focus point and the contribution of the focus frequency band can be quickly grasped. Conclusion: The vehicle-mounted frequency selection measurement (30 MHz-6 GHz) can realize the simultaneous measurement of the total field intensity and spectrum of each point, which effectively solves the remaining pain points caused by the use of non-frequency monitoring instruments. The obtained data amount is far more than that of the traditional grid measurement method, and the data are more representative, which can reflect the electromagnetic environment in the region more comprehensively. The vehicle-mounted frequency selection measurement can meet various requirements such as the measurement and evaluation of the overall level of regional electromagnetic environment and the analysis of the composition of the electromagnetic environment source terms, and provide more detailed and accurate basic data for the management of electromagnetic environment through visualized data.

Key words: vehicle type, frequency selection measurement, urban electromagnetic environment level, monitoring

中图分类号:

X837

唐辉, 高鹏, 粟琨璞, 唐研博, 徐彬, 谷洪, 李元东, 缪尔康. 车载式选频测量(30 MHz~6 GHz)在城市电磁环境水平监测的应用[J]. 辐射防护, 2023, 43(4): 311-317.

TANG Hui, GAO Peng, SU Kunpu, TANG Yanbo, XU Bin, GU Hong, LI Yuandong, MIAO Erkang. Application of vehicle-mounted frequency-selection measurement in urban electromagnetic environment monitoring[J]. RADIATION PROTECTION, 2023, 43(4): 311-317.

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