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Method for suppressing false target caused by blades of large wind turbine generator

A technology of wind turbines and fan blades, applied in radio wave measurement systems, instruments, etc., can solve the problems of reducing the size of radar resolution units, failing to solve the problem of false targets, reducing clutter power, etc., and achieving the effect of suppressing false targets

Active Publication Date: 2019-09-20
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

[0010]Traditional airborne fire control radars have some classic techniques for suppressing false targets caused by clutter, such as adjusting the beam form of the radar antenna and reducing the size of the radar resolution unit, thereby Reduce the power of clutter; use CFAR detection and clutter maps in the time domain to suppress clutter; apply MTI and MTD technologies in the frequency domain to reduce the power of clutter, etc. false target problem

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  • Method for suppressing false target caused by blades of large wind turbine generator
  • Method for suppressing false target caused by blades of large wind turbine generator
  • Method for suppressing false target caused by blades of large wind turbine generator

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Embodiment Construction

[0040] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. Embodiments of the present application will be described in detail below in conjunction with th...

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Abstract

The invention belongs to the field of airborne fire control radars, and particularly relates to a method for suppressing a false target caused by blades of a large wind turbine generator. The method comprises the steps of: processing echoes of an airborne radar to obtain a spectrogram; calculating a frequency coverage of fan blade rotation echoes according to radar echo information; making radar echo intensity statistics within the frequency coverage of the fan blade rotation echoes on each distance dimension of the spectrogram; determining whether the radar is subjected to clutter interference of the rotating blades of the wind turbine generator according to radar echo intensity statistic parameters; and performing box-type filtering of the frequency dimension within the frequency coverage of the fan blade rotation echoes on the spectrogram if so. The method can effectively suppress the false target caused by the blades of the large wind turbine generator, and can protect real target echoes while suppressing the false target.

Description

technical field [0001] The application belongs to the field of airborne fire control radar, in particular to a method for suppressing false targets caused by blades of large wind power generators. Background technique [0002] With the use of airborne active phased array radar equipment, low-altitude, low-speed targets have been able to be accurately detected and stably tracked. However, in the natural environment, there are continuous clutter echoes from land, sea, weather, birds and other radars that are not needed when searching for low-altitude targets. Of course, there are also discrete clutter echoes such as TV towers, water towers, high-voltage line towers, residential buildings, and other similar structures. The clutter will seriously interfere with the normal operation of the radar. The strong clutter echo can cover the echo of the desired target, making it difficult to detect the desired target, thus limiting the radar's ability. [0003] In recent years, more an...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/414Y02E10/72
Inventor 尹飞权文峰程柯嘉
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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