汪洪军 黄攀 董玉平 孔伟 刘延

摘要：素地电磁环境实测与分析对于先进测量实验室建设意义重大，可用于指导先进测量实验室建设选址的适用性和电磁环境影响控制设计。以中国计量科学研究院实验基地先进测量实验区为研究对象，制定测试方案，对实验区素地电磁环境特性进行测试。结果表明，该实验区建设地块四周工频磁场磁感应强度均大于0.01μT，动力站和10 kV 变电站周边更大，实验区核心位置磁感应强度基本在0.01μT 附近，为满足实验室工频磁场容许值，建设地点应沿周边道路退让一定距离，并应远离动力站和变电站，对工频磁场环境要求更为严格的实验室应依据测试数据采取必要的屏蔽处理措施;实验区所有位置的射频电场强度26～3000 MHz频段均小于1 V/m，最大场强为0.5037 V/m @26.3125 MHz，该频段射频电场强度对实验室建设影响不大，无需做任何防护处理措施。

关键词：实验室;素地;电磁环境;现场测试

中图分类号： TB973;TU18文献标志码： A文章编号：1674–5124（2021）12–0001–05

Measurement and analysis of electromagnetic environment in ground in plainadvanced measurement experimental area

WANG Hongjun1，HUANG Pan1，DONG Yuping2，KONG Wei1，LIU Yan1

（1. National Institute of Metrology， China， Beijing 100029， China;2. Beijing Branch of

Nanjing Bosen Technology Co.， Ltd.， Beijing 100027， China）

Abstract： The measurement and analysis of the electromagnetic environment is of great significance for the construction of the advanced measurement laboratory， which can be used to guide the applicability of the constructionsiteselection of the advanced measurement laboratory and the design of the electromagnetic environment impact control. Taking the advanced measurement experimental area of the experimental base of National Institute of Metrology as the research object， the test scheme is made to test the electromagnetic environment characteristics of the experimental area. The results show that the magnetic induction intensity of power frequency magnetic field around the construction site of the experimental area is greater than 0.01μT. The magnetic induction intensity around the powerstation and 10 kVsubstation is larger. The magnetic induction intensity at the core of the experimental area is basically around 0.01μT. in order to meet theallowable value of power frequency magnetic field of the laboratory， the construction site should retreat acertain distance along the surrounding road， and should be far away from the power station and substation For a more strict laboratory， necessary shielding measures should be taken according to the test data; the RF electric field strength of all positions in the experimental area is less than 1 V/m in the 26-3000 MHz frequency band， and the maximumelectricfieldstrength is 0.5037 V/m @26.3125 MHz， which has little impacton the laboratory construction and does not need any protective measures.

Keywords： laboratory; plain ground; electromagnetic environment; field test

0引言

近年來，随着科教兴国战略的深入实施，国家对科技教育领域的投入也越来越大，各个大学、科研院所纷纷兴建新的先进测量实验室，并自研或采购大量的高端科学仪器。但由于对实验设备正常使用所需的电磁环境条件的要求认识不足，在建设选址阶段不了解建设区域素地电磁环境状况，在实验室附近布置了大量的无线电通信设备和高压变配电设施且未对其做任何的处理措施，最终导致精密仪器设备损害、降低测量精度或产生难以接受的偏离。……