高空核爆电磁脉冲对便携式监护仪的辐射效应  

Radiation Effect of High-altitude Electromagnetic Pulse on Portable Monitor

作　　者：肖冬萍[1] 袁军[2] 何为[1] 简鑫[3] 周小艳[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]第三军医大学大坪医院,重庆400042 [3]重庆大学通信工程学院,重庆400030

出　　处：《高电压技术》2011年第7期1734-1739,共6页High Voltage Engineering

基　　金：中央高校基本科研业务费(CDJRC10150006);重庆市科技攻关项目(2010AC5022)~~

摘　　要：高空核爆电磁脉冲(HEMP)对电子和电气设备构成严重威胁,但是目前针对军队急救医疗卫生装备的电磁脉冲(EMP)耦合效应及防护研究还比较薄弱。因此以某款当前军队医院所使用的便携式监护仪为研究对象,利用有界波电磁脉冲模拟器模拟产生HEMP进行辐射试验,评估HEMP对监护仪的辐射效应,在各种试验条件下测量干扰场强阈值,分析HEMP对监护仪的作用机理。试验表明:HEMP辐射场对监护仪的工作状态会造成严重干扰,上升时间短、持续时间短的电磁脉冲对设备的干扰能力更强。结合监护仪结构、辐射试验结果、HEMP对监护仪的作用机理可得出以下结论:①场线耦合是引入电磁脉冲干扰的主要途径,当导联线与入射电场方向平行时耦合效应增强,导联线的屏蔽层结构对屏蔽效能有显著的影响;②监护仪外壳的屏蔽效能较差,电磁脉冲可由显示屏和空隙直接渗透至监护仪内部形成干扰,加强导联线和外壳的屏蔽效能将有效提高监护仪抗HEMP的能力。We experimentally simulated the high-altitude electromagnetic pulse （HEMP） acting on a portable monitor, in which the interference thresholds Under different test conditions were set out and the controlling rules of HEMP coupling effect on monitor were obtained. The experimental results show that HEMP radiant field will remarkably cause the interference to the operating state of monitor. The EMP with shorter risetime and duration is also much easier to disturb the state of monitor. After synthetically analyzing the factors, such as the structure of monitor, the results of radiation experiment, and the effecting mechanism of HEMP on monitor, the conclusions can be drawn as follows. Firstly, field-line coupling is the major interference approach. When the lead cables are parallel to the incident electric field, the coupling effect enhances. The shielding effect of lead cable depends on the configuration of shielding layer. Secondly, the ~hielding effect of the monitor＇s shell is too poor to prevent that HEMP radiant field penetrates through the monitor. Some reinforcement technologies should be taken to improve the shielding effect of lead cables and the shell of monitor.

关 键 词：高空核爆电磁脉冲(HEMP) 监护仪 有界波电磁脉冲模拟器 辐射效应 场线耦合 屏蔽 

分 类 号：TH776[机械工程—仪器科学与技术]