Apparatus for displaying terrain on a display apparatus of an airborne vehicle
View Patent ↗An apparatus for displaying terrain on a display apparatus of an airborne vehicle is provided. The apparatus includes a synthetic vision system having a terrain and obstruction database, an enhanced vision system with sensors for recording terrain data, a height and position sensor for determining the flight state data, a display apparatus, a processor for fusion of the data from the synthetic vision system and from the enhanced vision system. The height information that is produced by the synthetic vision system and the enhanced vision system is stored as pixels in a two-dimensional grid network. The fusion processor uses an error function for insertion of a pixel into the two-dimensional grid network. The error function provides an estimate of the size of the respective cell in which the pixel is stored, from the distance between the pixel and the sensor position.
1. A device for displaying terrain on a display device of an aircraft, comprising
a synthetic vision system having a terrain and obstacle database;
an enhanced vision system having sensors configured to acquire terrain data;
a height and position sensor configured to determine flight status data;
a display device;
a fusion processor coupled to the synthetic and enhanced vision systems, wherein the fusion processor is configured to fuse the data from the synthetic and enhanced vision systems to generate terrain data, wherein height information generated by the synthetic and enhanced vision systems is stored as pixels in a two-dimensional grid network; and
a graphics processor configured to send the terrain data generated by the fusion processor to the display device while taking into account the flight status data determined by the height and position sensor,
wherein the fusion processor is configured to use an error function when inserting a pixel into the two-dimensional grid network, the error function providing an estimate of the size of the respective cell, in which the pixel is stored, from the distance of the pixel from the sensor position.
2. The device as claimed in claim 1 , wherein the two-dimensional grid network represents a parameterization of a tangential surface of a terrestrial sphere with a hierarchical non-regular structure and a predeterminable maximum number of cells, and wherein a center of the two-dimensional grid network imaging the position of the sensor of the enhanced vision system.
3. A method for displaying terrain on a display device of an aircraft, comprising
determining, by a height and position sensor, flight status data;
acquiring, by an enhanced vision system having sensors, terrain data;
fusing, by a fusion processor, data from a synthetic vision system and the enhanced vision system to generate terrain data, wherein height information generated by the synthetic and enhanced vision systems is stored as pixels in a two-dimensional grid network;
outputting, by a graphics processor, the terrain data generated by the fusion processor to a display device while taking into account the flight status data determined by the height and position sensor,
wherein the fusion processor uses an error function when inserting a pixel into the two-dimensional grid network, the error function providing an estimate of the size of the respective cell, in which the pixel is stored, from the distance of the pixel from the sensor position.
4. The method as claimed in claim 3 , wherein the two-dimensional grid network represents a parameterization of a tangential surface of a terrestrial sphere with a hierarchical non-regular structure and a predeterminable maximum number of cells, and wherein a center of the two-dimensional grid network imaging the position of the sensor of the enhanced vision system.