飞机电缆屏蔽层环路阻抗测试系统设计与实现  

Design and Implementation of the Loop Impedance Test System of Aircraft Cable Shield

作　　者：赵宏旭[1] 王茜[1] 王家林[1] 

机构地区：[1]中国民航大学电子信息与自动化学院,天津300300

出　　处：《自动化仪表》2016年第12期40-44,共5页Process Automation Instrumentation

基　　金：国家商用飞机制造工程技术研究中心创新基金资助项目(编号:SAMC14-JS-15-054);中央高校基础研究课题基金资助项目(编号:3122015D013);中央高校基础研究课题基金资助项目(编号:3122015F002)

摘　　要：雷电及高强度辐射场会使航空总线屏蔽层产生瞬时高电流,影响数据传输的可靠性。将屏蔽层双端接地,可将瞬时高电流导入飞机机体,有效降低其对总线数据的影响。而屏蔽层自身阻抗及屏蔽层与结构地的端接阻抗,是衡量屏蔽效能的重要参数。基于矢量电压电流法,采用电磁感应技术,设计并实现了对飞机电缆屏蔽层环路阻抗的测试。经试验验证,该测试方法有效,测量范围宽且误差小。该方法的实现为飞机线缆安装与维修提供了重要的量化手段和辅助措施。Thunder lighting and high intensity radiation fields may cause the shield of avionic bus to produce high instantaneous current and affect the reliability of data transmission. Grounded both ends of the shield will introduce the high instantaneous current into aircraft frame,to effectively reduce the influence to the bus data. The own impedance of the shield and the termination impedance between shield and structural ground are the important parameters for measuring the shielding effectiveness. Based on vector voltage current method,and by using electromagnetic induction technology design,the test method for loop impedance of aircraft cable shield is implemented. The tests verify that this method is effective,and the measuring range is wide,the error is small. The implementation of this method provides important quantization means and supplementary measures for installation and maintenance of aircraft cables.

关 键 词：电缆 辐射场 屏蔽层 环路阻抗 矢量电压电流法 电磁感应 傅里叶变换 

分 类 号：TH7[机械工程—仪器科学与技术] TP206[机械工程—精密仪器及机械]