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Method for obtaining position of vessel particular point based on strong scattering points

A strong scattering point and acquisition method technology, applied in the field of radar, can solve the problem of poor strike effect of strong scattering points, and achieve accurate azimuth calculation and good effect

Active Publication Date: 2014-02-05
BEIHANG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problem that missiles directly hit strong scattering points with poor strike effect, and proposes a position acquisition method for specific points of ships based on strong scattering points

Method used

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  • Method for obtaining position of vessel particular point based on strong scattering points
  • Method for obtaining position of vessel particular point based on strong scattering points
  • Method for obtaining position of vessel particular point based on strong scattering points

Examples

Experimental program
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Embodiment

[0052] Calculate the position of a specific point on the simulated SAR image of a scale model of a certain ship.

[0053] The ship is 30m long, 6.5m wide, and the island is 6.5m long, 1.5m wide, and 2m high. In order to obtain the error of this method, a small metal cylinder is placed as a calibration point at a specific point, which appears as a strong scattering point on the SAR image. model such as image 3 shown.

[0054] Application of the evaluation method of the present invention is specifically:

[0055] Step 1: Obtain the radar image, radar viewing angle and geometric parameters of the ship, and set the coordinate system;

[0056] Specifically:

[0057] ⅰ: Input the SAR image I of the ship target, such as figure 2 shown;

[0058] ⅱ: Input radar viewing angle θ=60°;

[0059] ⅲ: Set the ship coordinate system E 1 and the image coordinate system E 2 :

[0060]Coordinate origin: ship center of mass;

[0061] x E1 Axis: through the center of mass of the ship, ...

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Abstract

The invention discloses a method for obtaining the position of a vessel particular point based on strong scattering points. The method includes the following steps that step1, a radar image, a radar viewing angle and vessel geometrical parameters are obtained, and a coordinate system is set; step2, an azimuth angle of the vessel is obtained according to an SAR image I; step3, image coordinates and corresponding actual coordinates of a reference point are obtained according to the strong scattering points; step4, image coordinates of the particular point is obtained according to a projection relationship. According to the particularity of a vessel object, the method can provide more effective information for calculating the azimuth angle by using scattering properties of a vessel island, so that the azimuth angle is calculated more accurately; the position coordinates of the particular point are calculated according to the strong scattering points, more accurate control information can be provided for guidance, and the method for obtaining the position of the vessel particular point based on the strong scattering points is better than the method which directly takes the strong scattering points as striking reference information in effect.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a position acquisition method of a specific point of a ship based on strong scattering points. Background technique [0002] Synthetic Aperture Radar (SAR) is an all-weather, all-time high-resolution microwave remote sensing imaging radar, which has the ability to detect targets hundreds of kilometers away and form clear two-dimensional images. Missile-borne SAR can provide real-time SAR images for missile cruise and terminal digital scene matching guidance. In a complex battlefield environment, SAR guidance technology has strong autonomy and anti-interference ability, which can effectively make up for the shortcomings of laser guidance and visible light guidance that are greatly affected by the environment. [0003] Strong scattering points are one of the typical features of ship SAR images. Strong scattering points usually correspond to some special structures of the ship (such...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41G01S13/883G01S13/90G01S13/9027
Inventor 孙兵李冰王烨王耿锞邓德仙
Owner BEIHANG UNIV
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