CN107728149B

CN107728149B - Method for adaptively detecting tornado by radar

Info

Publication number: CN107728149B
Application number: CN201710850745.0A
Authority: CN
Inventors: 马舒庆; 王国荣
Original assignee: Leixiang Technology Beijing Co ltd
Current assignee: Leixiang Technology Beijing Co ltd
Priority date: 2017-09-20
Filing date: 2017-09-20
Publication date: 2021-10-22
Anticipated expiration: 2037-09-20
Also published as: CN107728149A

Abstract

The invention discloses a method for detecting tornadoes by radar adaptability, which comprises the following steps: selecting N points in a tornado launching area, wherein the distance between adjacent points is 60-100 kilometers, every three adjacent points form a triangle, N mobile weather radars are respectively arranged at the points, every three adjacent radars form a group in the time when no tornado is generated, the triangular area is scanned simultaneously, and three-dimensional detection data are obtained through sequential cooperative observation; when a tornado occurs, the positions of the mobile weather radars are adjusted, so that the N mobile weather radars are arranged into a triangular arrangement mode by every three adjacent points along the possible moving direction of the tornado within the range of 20-40 kilometers of the distance between the adjacent weather radars, the tornado enters the triangle, and the three radars start scanning the corresponding triangle at the same time. The method can solve the technical problems of large coverage area, quick time for reaching an observation point, complete acquisition of the three-dimensional flow field of the tornado and the like when the tornado is observed.

Description

Method for adaptively detecting tornado by radar

Technical Field

The invention relates to a meteorological detection technology, in particular to a method for detecting tornadoes by radars.

Background

The traditional radar detection tornado mode: one is that one or more weather radars are fixedly arranged in a tornado multi-emission area to wait for the occurrence or immigration of tornados to detect; the other is that one or several mobile weather radars go to the tornado occurrence area to detect when a tornado occurs or is likely to occur. The former is equivalent to a conservative rabbit, and the capture efficiency is low. The latter has mobility and high capture efficiency. However, each radar detects the flow field independently, and effective three-dimensional flow field information cannot be obtained.

Disclosure of Invention

The invention aims to provide a method for detecting a tornado by radar adaptability, which aims to solve the technical problems of large coverage area, quick time for reaching an observation point, complete acquisition of a three-dimensional flow field of the tornado and the like during observation of the tornado.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:

selecting N points in a tornado launching area, wherein the distance between adjacent points is 60-100 kilometers, every three adjacent points form a triangle, N mobile weather radars are respectively arranged at the points, every three adjacent radars form a group in the time when no tornado is generated, the triangular area is scanned simultaneously, and three-dimensional detection data are obtained through sequential cooperative observation; when a tornado occurs, the positions of the mobile weather radars are adjusted, so that the N mobile weather radars are arranged into a triangular arrangement mode by every three adjacent points along the possible moving direction of the tornado within the range of 20-40 kilometers of the distance between the adjacent weather radars, the tornado enters the triangle, and the three radars start scanning the corresponding triangle at the same time.

The invention has the advantages and positive effects that:

(1) and (4) combining static and dynamic. The coverage range is large when the observation is fixed, and the distance between radars is 60-100 kilometers; when the device is observed in a moving mode, the radar distance is about 30 kilometers, and the azimuth resolution is obviously improved.

(2) In normal times, the distributed layout of the mobile radar ensures that the moving path is short when the tornado occurs, the time for reaching a detection point is fast, and the tornado can be effectively captured.

(3) The three radars detect the tornado simultaneously, and can completely acquire the three-dimensional flow field of the tornado.

Drawings

FIG. 1 is a schematic diagram of the distribution of the present invention when no tornado is occurring.

FIG. 2 is a schematic diagram of the location and direction of the occurrence of the tornado of the present invention.

FIG. 3 is one of the schematic illustrations of the present invention deployed after the reel has moved as shown in FIG. 2.

Fig. 4 shows the second purpose of the position and direction of the tornado.

FIG. 5 is a second schematic view of the present invention showing the arrangement of the reel after the reel is moved as shown in FIG. 4.

Detailed Description

The specific detection method of the invention is as follows:

firstly, selecting N points in a tornado launching area, wherein the distance between adjacent points is 60-100 kilometers, forming a triangle (preferably an equilateral triangle) by every three points, respectively arranging N mobile weather radars at the points, and cooperatively observing every three adjacent radars in a group in the time when the tornado is not generated to obtain three-dimensional detection data. See fig. 1, which shows a layout diagram when N = 6.

The combination of co-observations and the scan order were: (1) the 1, 3 and 4 radars scan the triangle formed by the 1, 3 and 4 radars at the same time; (2) the 1, 2 and 4 radars scan the triangle formed by the 1, 2 and 4 radars at the same time; (3) the 3, 5 and 4 radars scan the triangle formed by the 3, 5 and 4 radars simultaneously; (4) the 4, 5 and 6 radars scan the triangle formed by the 4, 5 and 6 simultaneously. And then returning to the step (1) again, and repeating the steps.

When a tornado occurs, if the tornado may occur at the position shown by the arrow as shown in fig. 2, and the moving direction is also shown by the arrow, then the moving radar moves rapidly through the road to form the layout of fig. 3, the distance between adjacent radars is about 30 km, and every three adjacent radars form a triangle.

When the tornado enters a triangle formed by a certain three adjacent radars, the three radars start to scan the triangle at the same time, and if the tornado is positioned among the triangles formed by the

radars

1, 2 and 3, the

radars

1, 2 and 3 scan at the same time to obtain three-dimensional detection data; when the tornado enters the triangle formed by the

radars

2, 3 and 4, the

radars

2, 3 and 4 scan simultaneously to obtain three-dimensional detection data.

If the tornado occurs in the position shown in fig. 4, the mobile radars move rapidly through the road, forming the layout shown in fig. 5, with a distance of about 30 km between adjacent radars, every third adjacent radar forming a triangle.

Radars

1, 3, 4; 1. 4, 2; 2. 4, 6; 4. 5 and 6 respectively form 4 triangles. The tornado enters that triangle and those three radars start scanning the corresponding triangle at the same time.

In fig. 1 to 5, a represents land and B represents sea.

Claims

1. A method for detecting tornadoes by radar adaptability comprises the following steps:

selecting N points in a tornado launching area, wherein the distance between adjacent points is 60-100 kilometers, every three adjacent points form a triangle, N mobile weather radars are respectively arranged at the points, every three adjacent radars form a group in the time when no tornado is generated, the triangular area is scanned simultaneously, and three-dimensional detection data are obtained through sequential cooperative observation; when a tornado occurs, the positions of the mobile weather radars are adjusted, so that the N mobile weather radars are arranged into a triangular arrangement mode by every three adjacent points along the possible moving direction of the tornado within the range of 20-40 kilometers of the distance between the adjacent weather radars, and the tornado enters into which triangle, and the three radars start scanning the corresponding triangle at the same time.

2. The method for radar-adaptive detection of tornadoes according to claim 1, wherein every three points form a triangle and the arrangement mode is an equilateral triangle.