Exocentric SVS Taxi View With Range Rings for Distance Judgment
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Solution Overview
Problem
The perspective of a synthetic vision system (SVS) image during taxiing can distort the crew's perception of distances between the aircraft and obstacles, and the lack of real-world reference complicates navigation in low-visibility conditions, increasing the risk of missed turns.
Innovation Solution
A system and method that generates a synthetic vision system (SVS) taxi mode exocentric view with range rings and a dynamic error circle, providing visual distance indicators and accuracy-based adjustments to enhance navigation clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an exocentric view is used in SVS during taxiing, then the crew can see a wider area around the aircraft, but the perception of distances between the aircraft and obstacles becomes distorted
Solution Approach 1:
The patent introduces range rings as concentric circular markers centered on the aircraft depiction, creating a radial dimension for distance measurement. Each range ring represents a specific distance interval from the aircraft, allowing the crew to gauge distances in the distorted exocentric view by referencing these dimensional markers rather than relying on natural perspective cues.
Solution Approach 2:
The range rings act as an intermediary visual element between the aircraft and the surrounding environment. These markers provide a reference framework that mediates the crew's perception of distance, translating the distorted exocentric view into measurable spatial relationships without requiring the crew to mentally calculate distances from the shifted perspective.
2Illumination intensity
If the SVS displays only synthetic imagery without real-world reference, then the system can provide enhanced visualization, but the crew's ability to cross-reference position and navigate accurately deteriorates
Solution Approach 1:
The patent segments the synthetic vision display into distinct functional components: the aircraft depiction, concentric range rings for distance measurement, a dynamic error circle for position accuracy indication, and airport feature overlays. This segmentation allows each element to serve its specific navigational function while collectively providing a comprehensive and reliable reference system that maintains navigation accuracy through structured visual information.
3Device complexity
If the viewing angle is shifted behind the aircraft, then the crew can monitor the area behind the aircraft, but the judgment of aircraft position with respect to airport features becomes less accurate
Solution Approach 1:
The patent incorporates a dynamic error circle that provides continuous feedback about GPS positioning accuracy. This feedback mechanism allows the crew to understand the reliability of the aircraft's position information in the exocentric view, compensating for the reduced accuracy in position judgment by knowing the magnitude of potential errors and adjusting their navigation accordingly.
Data Source
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AI summary
A system may include a display and a processor (502) communicatively coupled to the display. The processor (502) may be configured to: generate a synthetic vision system (SVS) taxi mode exocentric view of an aircraft when the aircraft is performing taxi operations and when the aircraft is on ground, wherein the SVS taxi mode exocentric view includes at least one range ring centered around a depiction of the aircraft, each of the at least one range ring providing a visual indication of a given range between the aircraft and a given range ring; and output, to the display, the SVS taxi mode exocentric view. The display may be configured to: display the SVS taxi mode exocentric view.