| 车载北斗导航仪电源线传导发射测试 |
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| 作者单位： | ;1.南京信息工程大学电子与信息工程学院 |
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| 摘 要： | 针对国内车载导航产品存在电磁兼容性测试不合格的问题,对某型车载北斗导航仪进行了电源线传导发射测试研究.首先分析了线性阻抗稳定网络(LISN)在测试中的重要作用,继而搭建测试平台分别测试了导航仪处于不同状态下的零线、火线传导发射,并评估了测量不确定度.为了对干扰信号的时频特性作进一步的分析,引入了短时傅里叶变换(STFFT)的分析方法.
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| 关 键 词： | 传导发射 不确定度 短时傅里叶变换 |
Conducted Emission Test Research on the Power Cord of a Beidou Vehicle Navigation Equipment |
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| Institution: | ,Electronics and Information Engineering College,Nanjing University of Information Science & Technology |
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| Abstract: | To the phenomenon that electromagnetic compatibility test unqualified problems exist in domestic car navigation products.We have carried on the power cord conducted emission test of a beidou vehicle navigation equipment.First,the important role of linear impedance stable network(LISN)in the test is analyzed,then the test platform is set up and respectively,the null line,the live wire conducted emission of the navigator under different states are tested.The uncertainty of measurement is calculated as well.For further analysis the time and frequency characteristics of the interference signal,short time fast Fourier transform(STFFT)method is introduced. |
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| Keywords: | conducted emission uncertainty short time fast Fourier transform |
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