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Radar Cross Section Detection Method for Ships

A technology of radar scattering cross section and detection method, which is applied to radio wave measurement systems, instruments, etc., and can solve problems such as inapplicability

Inactive Publication Date: 2011-12-28
TSINGHUA UNIV
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  • Claims
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Problems solved by technology

When the target is a plane, the calculation result of this method is infinity, which is not suitable for this research field

Method used

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  • Radar Cross Section Detection Method for Ships
  • Radar Cross Section Detection Method for Ships
  • Radar Cross Section Detection Method for Ships

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Embodiment Construction

[0081] Take ships as an example. We use commercial software and the present invention to calculate the radar cross section of the ship respectively. The calculation steps of the present invention are as follows:

[0082] a) Set the coordinate axes, the direction perpendicular to the side of the ship on the horizontal plane is the Z axis, the direction perpendicular to the Z axis on the horizontal plane is the X axis, and the direction perpendicular to the horizontal plane is the Y axis.

[0083] b) To model the target, use N polygons to express the surface of the target. The size of N varies according to the surface complexity of the target and the accuracy of the results. The polygons can be arbitrary, and each polygon is composed of a A group of three-dimensional point sets in counterclockwise order. Input the N polygons into the Matlab array in any order, and draw a stereoscopic perspective, such as Figure 4 shown.

[0084] c) Rotate the model counterclockwise along th...

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Abstract

The radar cross-section detection method for ships belongs to the field of high-speed analysis of radar cross-section (RCS) of target objects using Graphical Electromagnetic Computing (GRECO) technology. It is characterized in that the invention models the polygonal expression of the target object, and uses the scattering equation of physical optics, combined with the blanking technology of computer graphics, to improve the calculation of RCS, and no longer needs to divide the object, so that the calculation The cost has nothing to do with frequency, and the introduction of blanking also solves the shortcomings in the accuracy of the calculation. So as to achieve the purpose of high-speed and accurate calculation of high-frequency radar scattering cross section.

Description

technical field [0001] The invention belongs to the field of analyzing the radar cross-section (RCS) of a target object at a high speed by using the graph electromagnetic computing (GRECO) technology. Background technique [0002] Graphical Electromagnetic Computing (GRECO) technology is considered to be the most effective method in the field of electromagnetic scattering theory to analyze the radar cross section RCS of complex targets. At present, the more common graphics calculation methods are the subdivision calculation method of commercial software and the method realized by using Open GL, the standard interface technology of graphics software. [0003] 1. Subdivision algorithm of commercial graphics computing software: [0004] This method is limited by the calculation speed and storage space. The subdivision must decompose the target into small triangles with a scale no larger than 1 / 3 of the wavelength for calculation. The number of planar units after subdivision is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
Inventor 贾洪涛张志军陈文华冯正和
Owner TSINGHUA UNIV
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