Topographic database based topographic displaying method

A terrain display and database technology, applied in image data processing, 2D image generation, instruments, etc., can solve the problems of harassing alarms, not really put into use, immature, etc., and achieve the effect of increasing trust

Active Publication Date: 2015-07-01
COMAC +1
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Problems solved by technology

The terrain display focusing on the vertical profile has been applied in operation, and there has been continuous research on 3D terrain display, but it is not yet mature and has not been put into use
[0003] In the prior art, whether it is a mature horizontal terrain display or a vertical profile terrain display, there is a problem: when the aircraft is flying in a mountainous a

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  • Topographic database based topographic displaying method
  • Topographic database based topographic displaying method

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Embodiment Construction

[0026] In order to better illustrate the terrain display method based on the terrain database according to the present invention, it will be described in detail below with reference to the accompanying drawings.

[0027] Such as figure 1 In the horizontal projection diagram shown, the aircraft is flying steadily at a certain altitude (height and height redundancy are not shown in the projection diagram), and a position sensor for measuring latitude and longitude coordinates is used. The position sensor can be a GPS system to measure The latitude and longitude coordinates (J, W) of the position 1 of the aircraft in space, and use the altitude sensor to measure the height H of the aircraft in flight in space. At this time, with the horizontal plane of the flying height H where the aircraft is located as a reference, set the upward redundancy H1, the downward redundancy H2, the left horizontal redundancy L1, the right horizontal redundancy L2, and the front horizontal observation...

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Abstract

The invention relates to a topographic database based topographic displaying method. The topographic database based topographic displaying method comprises the following steps of (a) measuring longitude and latitude coordinates of a flying aircraft in a space and the height H of the flying aircraft in the space; (b) using the horizontal plane at the flying height H of the aircraft as reference to set an upper height redundancy H1, a downward height redundancy H2, a leftward height redundancy L1, rightward height redundancy L2 and a front horizontal observation distance D so as to form a closed space; (c) conducting reasonable laying within a height redundancy range and using a topographic database to obtain topographic dot matrixes within the horizontal plane where all heights are located; (d) superposing the topographic dot matrixes within the horizontal plane of all selected heights, wherein the connecting lines of dots closest to the aircraft, of formed distances, form a topographic contour line which serves as a safety boundary of the flying aircraft. Therefore, the formed topographic contour line can play a topographic warning role, and the topographic database based topographic displaying method is especially suitable for special topographies and can provide accurate and reliable topographic warning information for the aircraft during topographic inhabitation.

Description

technical field [0001] The invention relates to a topographic display method based on a topographic database, in particular to a display method that provides clear and reliable topographical warning information by means of topographic contour lines. Background technique [0002] Currently, TAWS (Terrain awareness and warning system: Terrain Awareness and Warning System) is used in civil aviation to identify dangerous terrain information. The terrain display focusing on the vertical profile has been applied in operation, and there has been continuous research on 3D terrain display, but it is not yet mature and has not been put into use. [0003] In the prior art, whether it is a mature horizontal terrain display or a vertical profile terrain display, there is a problem: when the aircraft is flying in a mountainous area, especially when flying close to the terrain, or at a special airport according to RNP (Required Navigation Performance: precision navigation Technology) When...

Claims

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Application Information

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IPC IPC(8): G06T11/00
Inventor 吴琛谢梦涛周贵荣方习高汤华余亮郑智明
Owner COMAC
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