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A method for lightning early warning and thundercloud trajectory prediction based on lightning early warning system

A technology for lightning early warning and trajectory prediction, applied in alarms, instruments, etc., can solve the problems of short warning time, inability to discriminate the movement path of thunderstorm clouds, and high virtual environment rate, so as to reduce the false alarm rate and missed alarm rate, and solve the problem of data loss. Consistency problems, the effect of short warning time

Active Publication Date: 2019-01-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Atmospheric electric field meters are mostly used in a single-station mode. The early warning of lightning is a non-directional early warning, which cannot distinguish the movement path of thunderstorm clouds. The early warning time is short and the virtual environment rate is high.
In recent years, a small number of units have tried to use multi-station atmospheric electric field instruments to network for lightning early warning. Compared with single-station use, the early warning effect has been greatly improved, but the problem of data consistency has not been solved. At the same time, there are still data sharing problems. It can be used in the same network segment LAN, so that the release of early warning information is not timely

Method used

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  • A method for lightning early warning and thundercloud trajectory prediction based on lightning early warning system
  • A method for lightning early warning and thundercloud trajectory prediction based on lightning early warning system
  • A method for lightning early warning and thundercloud trajectory prediction based on lightning early warning system

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Experimental program
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Effect test

Embodiment 1

[0036] Such as figure 1 The lightning early warning system shown includes N (N ≥ 4) sites and a background server. The N sites are distributed in a honeycomb structure, and each is equipped with a set of atmospheric electric field instruments; the N sites form a lightning monitoring network for monitoring Detect the atmospheric electric field value, and send the detected atmospheric electric field value to the background server through wireless communication or wired network. The background server uses the numerical interpolation calculation method to analyze and fit the atmospheric electric field value detected by each station, and eliminate False alarm sites, and supplementary alarms for missed negative sites, thereby reducing the overall false alarm rate and missed negative rate of the lightning monitoring network.

Embodiment 2

[0038] On the basis of the above-mentioned embodiment 1, the present invention proposes a lightning early warning method, figure 2 It is the lightning warning diagram of the lightning monitoring network at time t1. The lightning monitoring network is composed of lightning warning stations numbered 1-20. The number of stations can be increased or decreased freely according to needs, and the distance between each station can be adjusted according to the detection range and actual needs. Make adjustments. When the thunderstorm enters the detection range at time t1, if the electric field intensity of stations 1, 2, 3, 6, 8, 11, and 12 exceeds the warning threshold, an alarm message will be issued, and if the station 7 located between the alarm stations does not When an alarm message is issued, the system will consider that there is a fault or omission in station No. 7, and the system will use the electric field values ​​of surrounding stations to perform numerical fitting calcula...

Embodiment 3

[0040] On the basis of above-mentioned embodiment 1 and 2, Figure 4 A thundercloud trajectory prediction method is given, which is used to predict the moving path of thunderstorms. According to the electric field strength and warning strength detected by each station, the weight calculation method is used to estimate the location of the thunderstorm center at each moment. The specific calculation method is as follows:

[0041] Assuming that at time t, there are k locations where early warning information appears, and the coordinates of the sites where early warning information appears are (x i ,y i ), the warning strength of each site is W i , where i=0,1,····,k. Therefore, the position of the center of the thunderstorm at this moment for

[0042]

[0043] figure 2 In , when the thunderstorm enters the detection range at time t1, if the electric field strength of stations 1, 2, 3, 6, 8, 11, and 12 exceeds the warning threshold, an alarm message will be issued. At ...

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Abstract

The invention, which belongs to the lightning early warning and thundercloud track prediction field, discloses a lightning-early-warning-system-based lightning early warning and thundercloud track prediction method. According to the method, a ground electric field is monitored based on multi-station atmospheric electric field networking; lightning early warning is directional early warning; and a thundercloud motion path can be determined. The early warning time is short; and the virtuality rate is high. The atmospheric electric field information not only can be used in a same network-segment local area network but also can be shared, so that a data consistency problem can be solved. A background server carries out statistic calculation and analyses on data detected by all stations to remove a false alarm station; and supplementary alarming can be carried out on a station with missing reporting, so that the false alarm rate and the missing report rate of the lightning monitoring network can be reduced. Therefore, ground electric field distribution and thunderstorm moving path in a monitoring area can be obtained.

Description

technical field [0001] The invention belongs to the field of lightning early warning and thundercloud trajectory prediction, and in particular relates to a lightning early warning and thundercloud trajectory prediction method based on a lightning early warning system. Background technique [0002] Lightning is a weather phenomenon of transient high current, high voltage, and strong electromagnetic radiation that occurs in the atmosphere. With the widespread application of microelectronic devices and information technology, lightning disasters are becoming more and more serious. The society has a strong demand for lightning disaster monitoring, early warning and forecasting, and product services. Atmospheric electric field meters mostly use a single station, and the early warning of lightning is a non-directional early warning, which cannot distinguish the movement path of thunderstorm clouds, the early warning time is short, and the virtual environment rate is high. In rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/10
CPCG08B21/10
Inventor 毕晓蕾刘全桢刘宝全牟善军李博琛高鑫高剑姜辉刘娟
Owner CHINA PETROLEUM & CHEM CORP