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Radar reflectivity data fusion method based on Dialon Fresnel triangulation

A technology of triangulation and radar reflection, applied to instruments, character and pattern recognition, computer components, etc., can solve the problems of error accumulation, cumbersome and repetitive workload, etc.

Active Publication Date: 2020-11-06
CHENGDU UNIV OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To sum up, the essence of the existing fusion technology is to interpolate multiple radars into the same plane grid, and then perform data fusion and splicing. It does not make full use of multiple radar detections to increase the distribution density of reference data in space. The advantage of significantly improving the accuracy of data fusion; and the existing method of step-by-step processing results in cumbersome and repetitive workloads, resulting in continuous accumulation of errors in the process of multiple interpolation processing and fusion

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  • Radar reflectivity data fusion method based on Dialon Fresnel triangulation
  • Radar reflectivity data fusion method based on Dialon Fresnel triangulation
  • Radar reflectivity data fusion method based on Dialon Fresnel triangulation

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Embodiment 1

[0057] refer to figure 1 It is a kind of radar reflectivity data fusion method based on Dillonne triangulation, comprising the following steps:

[0058] S100: Read the reflectance data information of multiple radars, perform preprocessing, improve the quality of the reflectance data participating in the fusion, and form a reflectance data point set; then perform step S200;

[0059] In this embodiment, the reflectivity data of multiple radars are received, and some of the reflectivity data detected by the radars are invalid data. Therefore, before data fusion, it is necessary to delete invalid data and perform data preprocessing. The preprocessing includes The reflectivity data are smoothed and filtered in turn, supplemented with missing measurement points, removed isolated data points, and removed invalid data points to improve the quality of reflectivity data detected by each radar; The coordinates of each distance library (the minimum resolution unit of radar reflectivity d...

Embodiment 2

[0082] In this embodiment, the application effect of the radar reflectivity data fusion method based on Dirone triangulation of the present invention is described in detail:

[0083] This embodiment adopts one of the reflectivity data interpolation algorithms commonly used now: self-adaptive Barnes interpolation method and Dilongne triangulation algorithm of the present invention carry out comparative experiment; Figure 5-Figure 8 ,in, Figure 5 and Figure 7 They are the schematic diagrams of the fusion effect of reflectivity data of the adaptive Barnes interpolation method on the 3Km and 4KM height layers; Figure 6 and Figure 8 It is a schematic diagram of the reflectivity data fusion effect on the 3Km and 4KM height layers of the tetrahedral barycenter interpolation method based on Dilonne triangulation in the present invention. According to these four figures, it can be known that the reflectivity fusion results are at the two heights. The effect is not much differen...

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Abstract

The invention provides a radar reflectivity data fusion method based on Dialon Fresnel triangulation. The method comprises the following steps: reading reflectivity data information of a plurality ofradars, carrying out the preprocessing, improving the quality of reflectivity data participating in fusion, and forming a reflectivity data point set; performing three-dimensional grid division on thereflectivity data point set by adopting a virtual grid division technology to obtain a plurality of tetrahedrons; constructing a corresponding initial tetrahedron on each grid, and constructing three-dimensional delaunay triangulation for reflectivity data points in the initial tetrahedron by adopting a point-by-point insertion method; traversing to-be-interpolated points contained in each grid by adopting a spatial index method so as to locate a tetrahedron where the interpolation points are located; and calculating interpolation of all grid points in parallel by adopting tetrahedron gravitycenter coordinate interpolation. According to the method, the interpolation processing frequency of the same to-be-interpolated point is reduced, and superposition in the fusion process of multiple pieces of grid data is avoided, so that error accumulation is reduced, and the precision and efficiency of reflectivity fusion are improved.

Description

technical field [0001] The invention belongs to the technical field of weather radar data processing, and in particular relates to a radar reflectivity data fusion method based on Dillonne triangulation. Background technique [0002] Existing Doppler weather radars mostly work in a cone-scanning mode, which makes the albedo data density distributed unevenly in space, and cannot detect the albedo data of all points within the range, so it needs to be interpolated to the uniform grid points in the area of ​​interest; however, the scanning range of a single weather radar is limited, and there is a problem that the "quiet cone" cannot be observed. Often, multiple weather radars are used to jointly assist observation, and the fusion of detection data can effectively Make up for these deficiencies, and can effectively improve the performance of model precipitation forecasting. At present, the international radar reflectivity puzzle has become an important observation data for the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/25
Inventor 王海江孙敏陈夏朱嘉慧杜捷洁拉曲铁胡诗朋赖灿何姣阳郝博胜
Owner CHENGDU UNIV OF INFORMATION TECH
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