| 基于雷声到达时间差的单站闪电通道三维定位系统 |
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| 引用本文： | 章涵,王道洪,吕伟涛,孟青,张义军.基于雷声到达时间差的单站闪电通道三维定位系统[J].高原气象,2012,31(1):209-217. |
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| 作者姓名： | 章涵 王道洪 吕伟涛 孟青 张义军 |
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| 作者单位： | 1. 中国气象科学研究院雷电物理和防护工程实验室,北京,100081
2. 中国气象科学研究院雷电物理和防护工程实验室,北京100081／日本岐阜大学电子与电气工程系,日本5011193 |
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| 基金项目： | 国家自然科学基金项目，中国气象科学研究院基本科研业务费专项 |
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| 摘 要： | 利用麦克风阵列采集雷声信号,设计了一套由麦克风阵列和便携式数据采集存储设备组成的单站闪电通道三维定位系统,采用CCF相关函数法计算了雷声脉冲信号到达不同麦克风的时间差,通过最小二乘法获得声源的方向角和仰角信息,并结合声源与麦克风阵列的距离定位声源的三维位置。对一次包括8次回击的人工触发闪电过程进行了观测,得到多个声源点的三维定位信息。系统的定位结果与高速摄像的观测结果具有较好的一致性,定位方法合理、可行,为进一步研发便携式闪电通道三维定位系统奠定了基础。
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| 关 键 词： | 雷电 雷声 闪电三维定位 人工触发闪电 麦克风阵列 |
A Single-Station-Based 3D Lightning Channel Imaging System Using Differential Arrival Time of Thunder |
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| ZHANG Han,WANG Dao-hong,-,LU Wei-tao,MENG Qing,ZHANG Yi-jun.A Single-Station-Based 3D Lightning Channel Imaging System Using Differential Arrival Time of Thunder[J].Plateau Meteorology,2012,31(1):209-217. |
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| Authors: | ZHANG Han WANG Dao-hong - LU Wei-tao MENG Qing ZHANG Yi-jun |
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| Institution: | 1(1.Laboratory of Lightning Physics and Protection Engineering,Chinese Academy of Meteorological Sciences,Beijing 100081,China; 2.Department of Electrical and Electronic Engineering,Gifu University,Gifu 5011193,Japan) |
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| Abstract: | Single-station-based three-dimensional lightning channel imaging system,which uses the differential time of arrival of thunder,has been developed.The system consists of a small-size microphone array,a data collection and storage system.The microphone array is consisted of four microphones which work at a frequency range from 15 to 20 kHz.Thunder signals recorded by different microphones are processed by the cross-correlation analysis to obtain the differential time of arrival at different microphones,and the direction the thunder propagation is calculated by using the least square method.The distance from the thunder source to the array is determined by the time interval between the arrival of the electromagnetic signal and the thunder.Then the three-dimensional thunder sources are obtained by combining the direction and distance of thunder.The thunder signal of a rocket-triggered lightning comparing with 8 return strokes was recorded by this system,and the lightning channel imaging results have been compared with the photographs observed by a high-speed camera.The thunder source and photograph are found to agree fairly well,which indicates that the system developed in this study is feasible and can be used as a convenient lightning channel 3D imaging tool. |
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| Keywords: | Lightning Thunder Three-dimensional lightning channel imaging Rocket-triggered lightning Microphone array |
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