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Lightning discharge type identification method

A technology of discharge type and identification method, applied in character and pattern recognition, instrument, calculation, etc., can solve the problem of inability to identify lightning type accurately and quickly, and achieve the effect of strong application and high recognition rate

Inactive Publication Date: 2021-10-19
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a method for identifying the type of lightning discharge to solve the problem that the existing identification method cannot accurately and quickly identify the type of lightning

Method used

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Embodiment 1

[0034] In order to quickly and accurately distinguish lightning types, this application proposes a lightning discharge type identification method based on short-time Fourier transform.

[0035] A method for identifying a type of lightning discharge according to the present application, comprising the following steps:

[0036] Step 1: Obtain the pulse waveform generated by a lightning strike.

[0037] Step 2: Divide the pulse waveform into several segments.

[0038] A single lightning event produces many pulses, one for each point in space. From the perspective of the physical process of lightning, this pulse may be the pulse in the cloud, or it may be the step leader, or it may be the return strike of the ground lightning. Since the discharge space scale of each pulse is different, the time-domain waveform width of the electromagnetic pulse excited by it is also different. Generally speaking, the duration of the ground lightning strike back can reach tens to hundreds of mic...

Embodiment 2

[0061] In this example, using a large amount of lightning magnetic field change data in the Nanjing area, it is found that there are great differences in the spectrum of different types of lightning through the spectrum analysis method. The spectrum of the three stages of cloud discharge, step leader and ground lightning return is mainly concentrated in 9 ~ 56kHz , 52~236kHz and 2~14kHz.

[0062] The identification method of the type of lightning provided in this embodiment includes the following steps:

[0063] Step 1: Obtain the pulse waveform generated by a lightning strike.

[0064] Step 2: Divide the pulse waveform into several segments. After a large number of tests, it is found that when the pulse waveform cluster generated by a lightning in the entire time domain is divided into 200 microseconds / segment, it can cover different stages of lightning discharge pulse signals. Therefore, the pulse waveform generated by a lightning is divided into several segments according...

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Abstract

The invention discloses a lightning discharge type identification method, and relates to the technical field of lightning discharge type identification. The identification method comprises the following steps: acquiring a pulse waveform cluster generated by primary lightning in a whole time domain; dividing the pulse waveform cluster into a plurality of sections; analyzing the energy spectrum of each pulse waveform through wavelet transform, and generating an energy spectrum characteristic curve of primary lightning; calculating characteristic parameters of primary lightning according to the energy spectrum characteristic curve; and analyzing and processing the characteristic parameters to obtain the lightning type of the primary lightning. The lightning discharge type is judged by designing the characteristic parameters, cloud lightning, ground lightning return stroke and cascade leader can be quickly and accurately identified, the applicability is high, the identification rate is high, and important technical support is provided for lightning detection research and lightning protection disaster reduction work.

Description

technical field [0001] The present application relates to the technical field of lightning discharge type identification, and in particular to a lightning discharge type identification method. Background technique [0002] In recent years, the degree of harm caused by lightning disasters has been increasing, and the resulting impact on society and economic losses have also increased. Usually, the identification of lightning disaster accidents needs to clarify the type of lightning first, and the disasters caused by different types of lightning are different. Therefore, effective monitoring, prediction and research of lightning activities are necessary for the smooth progress of lightning protection and disaster reduction. has very important practical significance. [0003] Distinguishing between cloud and ground lightning has always been an important indicator for lightning monitoring and research. In the prior art, the purpose of distinguishing cloud flashes and ground fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06F2218/08G06F2218/12
Inventor 周仿荣马仪马御棠潘浩高振宇黄然文刚
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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