闪电电场传感与测量系统的研制
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摘要
针对目前电场测量装置存在带宽窄、共模噪声大等问题,提出以新型FPGA器件Artix-7为核心,结合传感和调理、宽带放大、单端转差分、高速采集、北斗定位等设计的电场探测系统。软核Microblaze实现数据处理和控制;等精度测量时间参数保证了高精度;FPGA驱动19英寸液晶。分析了信号链的阻抗,利用平行电极板构造变化电场对系统进行了测试,带宽达到20 MHz,电场强度的测量误差在±10%以内,线性度良好,脉冲电场的频率和占空比的最大测量误差分别为±0.4%和±1%。
In view of the current narrow bandwidth,common mode noise,and relying on industrial computer,the new lightning electric field detection system is designed with the combination of sensing and modulation,wideband amplification,single-end rotation difference,high-speed acquisition,Beidou positioning and so on. Microblaze achieves high integration of data processing and module-driven. Equal-precision method to measure the time parameters of the electric field ensures high accuracy in the whole frequency band. FPGA drives 19′ LCD display measurement. The impedance of the signal in link circuit is analyzed. The system was tested by using a parallel plate to construct variation electric field. The measurement bandwidth reaches 20 MHz,the electric field strength measurement error is within ±10%,the linearity is good,and the maximum errors of the frequency and duty cycle of the pulsed electric field are ±0.4% and ±1% respectively.
In view of the current narrow bandwidth,common mode noise,and relying on industrial computer,the new lightning electric field detection system is designed with the combination of sensing and modulation,wideband amplification,single-end rotation difference,high-speed acquisition,Beidou positioning and so on. Microblaze achieves high integration of data processing and module-driven. Equal-precision method to measure the time parameters of the electric field ensures high accuracy in the whole frequency band. FPGA drives 19′ LCD display measurement. The impedance of the signal in link circuit is analyzed. The system was tested by using a parallel plate to construct variation electric field. The measurement bandwidth reaches 20 MHz,the electric field strength measurement error is within ±10%,the linearity is good,and the maximum errors of the frequency and duty cycle of the pulsed electric field are ±0.4% and ±1% respectively.
引文
[1] 罗福山,何渝晖,张健,等.新型倒装式旋转电场仪[J].空间科学学报,2004,24(6):470-474.
[2] 罗福山,庄洪春,何渝晖,等.球载双球式电场仪及其应用[J].地球物理学报,1999(6):772-777.
[3] 罗福山,庄洪春,何渝晖,等.微火箭电场仪的原理及其应用[J].地球物理学报,2000(5):616-620.
[4] 邱实,周璧华,郭建明,等.闪电电场测量研究[J].电波科学学报,2011,26(1):79-83.
[5] 周璧华,郭建明,邱实,等.闪电电场变化测量仪研究[J].地球物理学报,2012,55(4):1114-1120.
[6] 张广庶,郄秀书,王怀斌,等.闪电多参量同步高速即时记录系统[J].高原气象,2003(3):301-305.
[7] 黎勋,郄秀书,刘昆,等.基于高时间分辨率快电场变化资料的北京地区地闪回击统计特征[J].气候与环境研究,2017,22(2):231-241.
[8] 宁增琨,行鸿彦.新型闪电电场变化测量系统设计[J].中国测试,2015,41(3):78-81.
[9] 陈自然,赵建,田伟,等.高精度磁场式时栅传感器激励信号对测量误差的影响分析及系统设计[J].传感技术学报,2018,31(10):1527-1534.
[10] 陈骥,朱伟芳,赵晓明,等.基于FPGA的视觉电生理图像刺激系统的设计[J].传感技术学报,2012,25(2):170-174.
[11] 陶中幸.基于FPGA的语音信号波形VGA显示方法[J].液晶与显示,2016,31(2):185-192.
[12] Saadi S,Touiza M,Kharfi F,et al.Dyadic Wavelet for Image Coding Implementation on a Xilinx MicroBlaze Processor:Application to Neutron Radiography.[J].Applied Radiation & Isotopes,2013,82(1):200-210.
[13] 裴晓芳,王洁,宋林.基于FPGA的快速图像纹理特征提取方法的研究[J].电子测量与仪器学报,2017,31(7):1067-1073.
[2] 罗福山,庄洪春,何渝晖,等.球载双球式电场仪及其应用[J].地球物理学报,1999(6):772-777.
[3] 罗福山,庄洪春,何渝晖,等.微火箭电场仪的原理及其应用[J].地球物理学报,2000(5):616-620.
[4] 邱实,周璧华,郭建明,等.闪电电场测量研究[J].电波科学学报,2011,26(1):79-83.
[5] 周璧华,郭建明,邱实,等.闪电电场变化测量仪研究[J].地球物理学报,2012,55(4):1114-1120.
[6] 张广庶,郄秀书,王怀斌,等.闪电多参量同步高速即时记录系统[J].高原气象,2003(3):301-305.
[7] 黎勋,郄秀书,刘昆,等.基于高时间分辨率快电场变化资料的北京地区地闪回击统计特征[J].气候与环境研究,2017,22(2):231-241.
[8] 宁增琨,行鸿彦.新型闪电电场变化测量系统设计[J].中国测试,2015,41(3):78-81.
[9] 陈自然,赵建,田伟,等.高精度磁场式时栅传感器激励信号对测量误差的影响分析及系统设计[J].传感技术学报,2018,31(10):1527-1534.
[10] 陈骥,朱伟芳,赵晓明,等.基于FPGA的视觉电生理图像刺激系统的设计[J].传感技术学报,2012,25(2):170-174.
[11] 陶中幸.基于FPGA的语音信号波形VGA显示方法[J].液晶与显示,2016,31(2):185-192.
[12] Saadi S,Touiza M,Kharfi F,et al.Dyadic Wavelet for Image Coding Implementation on a Xilinx MicroBlaze Processor:Application to Neutron Radiography.[J].Applied Radiation & Isotopes,2013,82(1):200-210.
[13] 裴晓芳,王洁,宋林.基于FPGA的快速图像纹理特征提取方法的研究[J].电子测量与仪器学报,2017,31(7):1067-1073.