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Analysis on Time-Frequency Characteristic of Lightning Rapid Electric Field Signals Based on Wavelet Transform
Pages: 25-30
Year: Issue:  7
Journal: Measurement & Control Technology

Keyword:  lightning rapid electric field signalstime-frequency characteristicswavelet transformintracloud lightning(IC)cloud to ground lighting(CG);
Abstract: 应用小波变换方法将具有短时非平稳特点的闪电快电场时域波形信号转换到二维的时频平面,从时间和频率上同时描述闪电快电场信号的电场强度或相对能量分布,揭示其所包含的不同频率分量及其随时间变化的特性.分析结果表明,基于小波变换的闪电快电场信号时频特性分析可以挖掘闪电电场更深层次的变化规律和特征;也为闪电放电类型的识别研究提供了新的思路.
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