基于扫频调谐预扫描的快速EMI测试关键技术研究
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摘要
针对点频式测量方法进行EMI测试效率低的问题,基于扫频调谐预扫描实现EMI快速测试。首先,根据扫频、点频调谐测量方法的特点,提出基于扫频调谐预扫描、点频调谐终测量的快速EMI测试系统框架及拓扑关系;其次,研究扫频调谐式预扫描的误差补偿技术,研究环境电平、天线与馈线对测试精度影响的补偿方法;最后,按照GB14023-2011规定,搭建专用于车辆扫频调谐预扫描的快速EMI测试系统,实现误差修正、数据存储、数据处理等高度定制化功能.结果表明:在30~1 000 MHz频段的峰值检波,使用扫频调谐预扫描可以节省时间47.4 s,提高检测效率33.02%。
Aiming at the low efficiency of separate Electro Magnetic Interference( EMI) measurement method,a rapid EMI measurement method based on swept-tuned pre-scanning was proposed. First, according to the characteristics of sweep and separate tuned measurement method,the framework and the topological relation of rapid EMI measurement system based on swept-tuned pre-scanning is proposed. Second,electromagnetic field emission measurement error caused by environment,antenna and transmission was analyzed and compensated. Finally,according to the Chinese National Standard GB14023- 2011,an EMI automatic rapid measurement system dedicated to the vehicle was set up. The design method of EMI measurement system could ensure the measurement steps,error correction,data storage,data processing and any other customized function implementation. The result shows that at bands from 30 to 1 000 MHz using swept-tuned peak detection pre-scanning can decrease about 33. 02% time.
Aiming at the low efficiency of separate Electro Magnetic Interference( EMI) measurement method,a rapid EMI measurement method based on swept-tuned pre-scanning was proposed. First, according to the characteristics of sweep and separate tuned measurement method,the framework and the topological relation of rapid EMI measurement system based on swept-tuned pre-scanning is proposed. Second,electromagnetic field emission measurement error caused by environment,antenna and transmission was analyzed and compensated. Finally,according to the Chinese National Standard GB14023- 2011,an EMI automatic rapid measurement system dedicated to the vehicle was set up. The design method of EMI measurement system could ensure the measurement steps,error correction,data storage,data processing and any other customized function implementation. The result shows that at bands from 30 to 1 000 MHz using swept-tuned peak detection pre-scanning can decrease about 33. 02% time.
引文
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[16]刘时宜,王文格,胡旭,等EMI现场测试中常驻窄带信号剔除算法研究[J].电子测量与仪器学报,2015,29(9):1271-1277.LIU SH Y,WANG W G,HU X,et al.Study on permanent narrowband signal culling algorithm in EMI field testing[J].Journal of Electronic Measurement and Instrumentation.2015,29(9):1271-1277.
[17]严冬,汪朋,李帅永,等.2.45 GHz印刷倒F天线的研究与实现[J].仪器仪表学报,2015,36(10):2372-2380.YAN D,WANG P,LIS SH Y,et al.Research and realization of 2.45 GHz printed inverted-Fantenna[J],Chinese Journal of Scientific Instrument,2015,36(10):2372-2380.
[18]GHOSH S,CHAKRABARTY A,SANYAL S.Estimation of antenna factor of wire antenna as EMI sensor[J].Journal of Electro-magnetic Waves and Applications,2002,16(1):7991.
[19]GB14023-2011.车辆、船和内燃机无线电骚扰特性用于保护车外接收机的限值和测量方法[S].2011.GB14023-2011.Vehicles,boats and internal engine Radio disturbance characteristics Limits and methods of measurement for the protection off-board receivers[S].2011.
[2]张兰勇,刘繁明,李冰.印制电路板电磁辐射等效偶极子建模与预测[J].仪器仪表学报,2013,34(4):942-947.ZHANG LY,LIU FM,LI B.Equivalent dipole modeling and predicting of electromagnetic emissions of printed circuit boards[J].Chinese Journal of Scientific Instrument,2013,34(4):942-947.
[3]SCHRADERT,MUNTERK,JASTROW C,et al.Onsite EMC testing and interference prevention[C].IEEE International Symposium on Electromagnetic Compatibility,2009:166-170.
[4]熊文卓.机载光电测量吊舱的电气接地技术[J].国外电子测量技术,2015,34(10):79-83.XIONG W ZH.Grounding design process and engineering practice of the airborne electro-optical measuring system[J].Foreign Electronic Measurement Technology,2015,34(10):21-25.
[5]包贵浩,苏东林.飞机油量表电磁兼容半实物仿真预测平台设计[J].电子测量与仪器学报,2014,28(2):152-158.BAO G H,SU D L.Design of electromagnetic compatibility prediction platform for aircraft fuel quantity indication system based on hard ware in the loop simulation[J].Journal of Electronic Measurement and Instrumentation,2014,28(2):152-158.
[6]FRECH A,RUSSE R P.Real-time ambient noise cancellation for EMI measurements on open area test sites[C].2012 Asia-Pacific Symposium on Electromagnetic Compatibility(APEMC),2012:213-216.
[7]巨汉基,郑丽萍,刘延泉,等电力计量设备的辐射骚扰测试系统的设计及分析[J].电测与仪表,2013,50(11A):16-21.JU H J,ZHENG L P,LIU Y Q,et al.Electricity metering equipment radiated emission test system design and analysis[J].Electrical Measurement&Instrumentation,2013,2013,50(11A):16-21.
[8]文家昌,叶祥平.建设EMC测试实验室的技术研究[J].电子测量技术,2013,36(9):1-4.WEN J CH,YE X P.Studies on technology of building up EMC testing laboratory[J].Electronic Measurement Technology,2013,36(9):1-4.
[9]LI Z,WU H H.Research and implementation of IVICOM driver for digital oscilloscope[J].Applied Mechanics&Materials,2014,496-500(1):1197-1201.
[10]苟江川,朱峰,刘光辉,等.基于虚拟仪器的电磁干扰近场测试系统设计[J].计算机测量与控制,2015,23(1):16-18,21.GOU J CH,ZHU F,LIU G H,et al.Design of EMI near-field test system based on virtual instrument[J].Computer Measurement&Control,2015,23(1):16-18,21.
[11]赫晓军,陈祥,闫京海.基于预测分析的电磁兼容数据库设计[J].电子测量技术,2015,38(6):122-124.HAO X J,CHEN X,YAN J H.Database design for electromagnetic compatibility prediction[J].Electronic Measurement Technology.2015,38(6):122-124.
[12]唐敦兵,彭义兵,刘政伟.基于关联矩阵与设计结构矩阵的计算模型求解顺序规划[J].机械工程学报,2008,44(12):173-179.TAND D B,PENG Y B,LIU ZH W.Execution Sequence planning of computational models based on incidence matrix and design structure matrix[J].Chinese Journal of Mechanical Engineering,2008,44(12):173-179.
[13]ZHANG X F,CAO Y.Visual flexible coding system design based on FSM[C].International Conference on Advances in Materials Science and Information Technologies in Industry(AMSITI),2014:1077-1080.
[14]冯鑫.基于EMC现场测试的环境剔除技术研究[D].西安:西安电子科技大学,2013.FENG X.EMC field test environment culling technology[D].Xi’an:Xi’an University of Electronic Science and Technology,2013.
[15]郭淑霞,董中要,刘孟江,等.复杂电磁环境模拟技术研究[J].国外电子测量技术,2013,32(7):21-25.GUO SH X,DONG ZH Y,LIU M J,et al.Research on complex electromagnetic environment simulation technology[J].Foreign Electronic Measurement Technology.2013,32(7):21-25.
[16]刘时宜,王文格,胡旭,等EMI现场测试中常驻窄带信号剔除算法研究[J].电子测量与仪器学报,2015,29(9):1271-1277.LIU SH Y,WANG W G,HU X,et al.Study on permanent narrowband signal culling algorithm in EMI field testing[J].Journal of Electronic Measurement and Instrumentation.2015,29(9):1271-1277.
[17]严冬,汪朋,李帅永,等.2.45 GHz印刷倒F天线的研究与实现[J].仪器仪表学报,2015,36(10):2372-2380.YAN D,WANG P,LIS SH Y,et al.Research and realization of 2.45 GHz printed inverted-Fantenna[J],Chinese Journal of Scientific Instrument,2015,36(10):2372-2380.
[18]GHOSH S,CHAKRABARTY A,SANYAL S.Estimation of antenna factor of wire antenna as EMI sensor[J].Journal of Electro-magnetic Waves and Applications,2002,16(1):7991.
[19]GB14023-2011.车辆、船和内燃机无线电骚扰特性用于保护车外接收机的限值和测量方法[S].2011.GB14023-2011.Vehicles,boats and internal engine Radio disturbance characteristics Limits and methods of measurement for the protection off-board receivers[S].2011.