Minimum safe altitude warning method and method and device for generating terrain surface mesh in self-adaptive mode

Abstract

The invention discloses a minimum safe altitude warning method and a method and a device for generating a terrain surface mesh in self-adaptive mode. The method for generating the terrain surface mesh in self-adaptive mode includes: enabling a center of a barrier in a region to serve as a center of an initial-state terrain surface mesh according to three-dimensional mapping data of the region waiting for performing terrain surface mesh division, extending covering surface of the terrain surface mesh at least one time according to set rules, and using the state of the terrain surface mesh before the extension as the confirmed state of the terrain surface mesh if difference between height of the terrain surface mesh after the one-time extension and height of the initial-state terrain surface mesh exceeds a set threshold. The difference between the height of the terrain surface mesh after the extension and the height of the initial-state terrain surface mesh is limited in a fixed threshold, thereby guaranteeing that a mesh dose not enable some low altitude fields to be classified in the terrain surface mesh with high height value as much as possible. The terrain surface mesh is used for performing minimum safe altitude warning, utilization rate of an aerial target on a low altitude airspace space can be improved, and false-alarm rate is reduced.

Description

technical field [0001] The invention relates to the general aviation communication technology, in particular to the technology of warning the minimum safe altitude of air targets. Background technique [0002] In recent years, general aviation has developed rapidly. Business flight, commercial flight, air tour, and private driver's license training are being favored by more and more people, and there is a large enough market demand. General purpose aircraft already plays a very important role in the country's economy. [0003] With the continuous development of the air transportation industry and the reform of low-altitude airspace management, low-altitude airspace resources have become hot resources for military flights, civil transport flights, and general aviation flights. In order to ensure the flight safety of air targets and take full advantage of low-altitude airspace resources, the flight control department monitors air targets in low-altitude airspace and implemen...

AI Technical Summary

Problems solved by technology

[0008] Since the height of the surface grid is determined by the highest value of the surface obstacle in the grid, if there is a high-rise building such as a high tower in the grid, the radius of a radius of about 2km is considered to be as high as the high-rise building, which is greatly It reduces the space utilization rate of low-altitude airspace, especially at present, the performance of aircraft is increasing day by day, which greatly limits the general aviation flight activities in low-altitude airspace in my country, and at the same time violates the flight rules of general aviation visual flight. If this warning judgment is continued rules, controllers will continue to receive a large number of false alarms from general aircraft flights

[0009] Moreover, the ground surface grid in the prior art is a fixed static table, which cannot be simply replaced at will, and cannot be adjusted according to the terrain. At the same time, once an obstacle of a new height appears, the obstacle may fall on different ground grids at the same time. It will cause the height of the multi-surface grid to be adjusted to the new height at the same time, thus wasting more low-altitude airspace space range

[0010] In addition, the update of the surface grid data in the prior art requires manual calculation and input, which requires a large workload, and is input based on the contour lines of the geographic data. Once the new geographic data changes, the maintenance workload is very large

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