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Method for extending azimuth scanning data for generating radar PPI image and circuit thereof

A technology of scanning data and radar, which is applied in the expansion field of azimuth scanning data when radar PPI image is generated, can solve problems such as insufficient azimuth scanning echo data, splitting, discontinuous radar PPI image azimuth, etc., to avoid discontinuity or splitting Phenomenon, improve the display effect

Active Publication Date: 2008-11-12
深圳市亿威尔信息技术股份有限公司
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Problems solved by technology

[0007] The present invention proposes a method and circuit for expanding the azimuth scanning data of radar PPI images to solve the problem of azimuth scanning echo data due to the relatively small number of radar detection cycles when displaying radar PPI images using raster scanning system display devices Insufficient, resulting in technical problems that make the radar PPI image discontinuous or split in azimuth

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  • Method for extending azimuth scanning data for generating radar PPI image and circuit thereof
  • Method for extending azimuth scanning data for generating radar PPI image and circuit thereof
  • Method for extending azimuth scanning data for generating radar PPI image and circuit thereof

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[0022] For ease of understanding, a brief introduction to radar PPI image generation technology is given first:

[0023] At present, the display devices using raster scanning system, such as CRT display, LCD display and PDP display, when realizing the radar PPI image display, must first locate the echo data of the radar emission pulse according to its azimuth and distance coordinates. In a series of storage units of an image memory; the image memory suitable for the raster scanning system, its storage units are addressed in the Cartesian coordinate system X-Y, and each storage unit corresponds to a pixel on the display screen.

[0024] like figure 1 Shown in distance coordinates R i and azimuth coordinates θ j Indicates the position of the radar target, while the grating display uses the Cartesian coordinate system X-Y displayed on the screen. If the Cartesian coordinate system X-Y is used to represent the target position, the basic relationship of converting polar coordinat...

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Abstract

A method of azimuth scan data for generating radar PPI images in an expanding way and a circuit thereof are disclosed, wherein, the method comprises the steps: a pulse signal PR emitted by a radar is taken as trigger to produce a synchronized control signal, by virtue of alternate control store the echo data E(Thetam, Ri) of a radar emitting pulse PRm in sequence in a memory cell with the address D(Thetam, Ri) in a first echo data memory and write the echo data E(Thetam-1, Ri) in a second echo data memory in a mapped memory with the address D(Thetaj, Ri); and before the reach of a following pulse signal PRm+1, the echo data E(Thetam-1, Ri) in the second echo data memory is repeatedly read and written in sequence to each distance unit (D(Thetaj+1, Ri) D(Thetaj+2, Ri)... D(Thetaj+n, Ri) in the next position neighboring Thetaj in the mapped memory. The method of the invention causes the radar echo data to keep continuous in position, reforms the display of the radar PPI images, can be applicable to radars with various antenna scanning cycles and probing cycles.

Description

technical field [0001] The present invention relates to a radar PPI image processing technology, in particular to a method and a circuit for extending the azimuth scanning data when the radar PPI image is generated when the display device of the raster scanning system is used to display the radar PPI image. Background technique [0002] In the random scanning display, the radar's Plan Position Indicator (PPI) image does not display repeatedly, and it disappears automatically after the scan line passes, leaving only a short afterglow, so it is difficult to observe the echo. The radar plane position display of the raster scan display system uses the pixel data of the radar PPI image to form the image of the PPI image in the image memory, and then outputs and displays it in the form of raster scan, and repeatedly displays it at a frequency of tens of Hertz per second. In this way, a stable radar PPI image can be seen on the screen, which greatly improves the observation efficie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/12G01S13/89
Inventor 王立真付郁
Owner 深圳市亿威尔信息技术股份有限公司
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