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目的了解雷达作业时电磁辐射场强分布特点,为制定卫生防护对策提供依据。方法按照军用标准有关电磁辐射测量方法,使用电磁辐射场强仪对雷达站作业区和周围环境进行检测评价,计算天线主波束影响范围和安全距离。结果 5个雷达站作业区机房内有2个检测点、机房外有3个检测点超过职业暴露限值,生活区1个检测点超过环境容许值;雷达周围建筑物均符合主波束安全距离要求。结论雷达站内辐射主要来自发射设备的泄漏,站外辐射主要来自天线的主波束和副波束影响,随天线旋转而变化。防护对策应包括天线架设、分区管理、设备维护和职业健康监护等。
Objective To understand the distribution characteristics of field intensity of electromagnetic radiation during radar operation and provide the basis for the development of health protection measures. Methods According to the military standard about electromagnetic radiation measurement method, the electromagnetic radiation field strength meter is used to test and evaluate the working area and surrounding environment of the radar station, and the influence range and safety distance of the main beam of the antenna are calculated. Results There were two detection points in the engine room of the five radar stations and three detection points outside the engine room which exceeded the occupational exposure limit. One detection point in the living area exceeded the allowable value of the environment. The buildings around the radar complied with the requirements of the main beam safety distance . Conclusion The radiation in the radar station mainly comes from the leakage of the transmitting equipment. The radiation outside the station mainly comes from the influence of the main beam and the sub-beam of the antenna, and changes with the rotation of the antenna. Protection measures should include antenna erection, zoning management, equipment maintenance and occupational health monitoring.