基于低频磁天线雷电监测电路的设计及应用

针对甚低频磁天线在闪电定位网中应用的问题,介绍了甚低频磁天线的电路设计和标定方法,通过对磁场变化测量的理论分析,设计了合理的实验。利用冲击平台模拟自然闪电发生时产生的磁场变化,来检测甚低频磁天线工作的准确性和稳定性。采用自主研制的磁天线对南京地区产生的一次雷暴过程进行测量。得出:在南京地区2016年8月2日观测到的1004次回击波形中,其中上升沿持续时间在1~10μs,大部分主要集中在1~4μs(72.2%)之间,连续电流的平均持续时间为3.35μs;将反演运算得到的波形与实测波形、定位结果与江苏省闪电定位系统的结果分别进行对比,验证了所提方案的可行性和技术上的先进性,这对甚低频磁天线在实际应用中具有一定的指导意义。

Design and Application of Lightning Monitoring Circuit Based on Low Frequency Magnetic Antenna

For the issue of the application of VLF magnetic antenna in lightning locating network, this paper introduces the VLF magnetic circuit design and calibration method of the antenna based on theoretical analysis of the magnetic field changes the measuring design of experiment. The accuracy and stability of the working of VLF magnetic antenna are detected by using the impact platform to simulate the variation of the magnetic field generated by natural lightning. The process of thunderstorm in Nanjing area was measured by the self-developed magnetic antenna. The conclusions are as follows: The rising edge is about 1~10 s in the 1004 times the waveforms observed in Nanjing area on August 2, 2016, and most of them are mainly focused on 1~4 s(72.2%), and the average length of continuous current is 3.35 s. Getting the waveform and the measured waveform inversion operation, positioning results compared with the results of the lightning locating system of Jiangsu province respectively, verify the feasibility of the proposed scheme and technical sophistication, which has a certain value in practical application.