摘要
为提高对闪电辐射电场瞬态高频分量的探测能力,抑制环境工频噪声影响,本文设计了一种基于高阶滤波的闪电电场测量系统,对于高频通带内信号,其灵敏度为12.11 V/(m/V),最小可以识别0.1 V/m的脉冲电场信号,对工频噪声的抑制可达41 dB。另一方面,为克服高阶滤波作用带来的测量电场低频失真问题,提出了一种直接根据传感器电路参数构造系统函数的波形校正方法,对失真的低频信号进行补偿。通过模拟数值和实测数据的验证分析可知,利用提出的高阶快天线测量系统以及重构方法,既可以观测得到微弱的闪电电场变化事件,又能够在一定程度上补偿波形的低频失真成分,可应用于多站闪电定位以及雷电放电参数的反演估计。
In order to improve the detection ability of the transient high-frequency component of the lightning radiation electric field and to suppress the influence of environment power frequency noise, a lightning electric field measurement system based on high-order filtering is designed in this paper. The sensitivity of the system is 12.11 V/(m/V)for the high-frequency in the passband, and minimum 0.1 V/m little pulse signal can be recognized. The system can suppress the environmental noise up to 41 dB. In addition, in order to overcome the low frequency distortion of the real electric field due to the high-order filtering, this paper proposes a waveform correction method which directly constructs the system function according to the sensor circuit parameters to compensate the distorted low frequency signals. Through simulation validation of numerical and experimental data analysis show that the proposed high-order fast antenna measurement system and the reconstruction method can to observe weak lightning electric field change events, and to some extent, can to compensate the low frequency distortion of waveform. This measurement system and reconstruction method can be applied to multi-station lightning location and lightning discharge parameter estimation.
作者
陈亦丹
邱实
石立华
卢治钢
CHEN Yidan;QIU Shi;SHI Lihua;LU Zhigang(National Key Laboratory on Electromagnetic Environmental and Electro-Optical Engineering,Army Engineering University of PLA,Nanjing Jiangsu 210010,China;Unit 32203 of PLA,Huayin 714200,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2021年第8期1027-1032,共6页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(41675002)。
关键词
信号处理
电场传感器
高阶滤波
波形校正
signal processing
electric field sensor
high-order filtering
waveform correction
