Virtual Lane Guidance for Intersection Navigation
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Solution Overview
Problem
Advanced automatic driving vehicles face challenges in navigating intersections without lane lines, as they rely on lane lines for guidance, and existing methods fail to provide effective guidance for smooth passage through such scenarios.
Innovation Solution
A method and system that generate a reference running track based on the coordinates of the entering and leaving roads at an intersection, and in real-time, adjust the vehicle's speed and turning angle to match the reference track, using sensors and cameras to ensure safe passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If vehicles depend on lane lines for driving guide, then driving guidance is provided when lane lines are present, but vehicles cannot be guided when passing through intersections without lane lines
Solution Approach 1:
The patent introduces virtual lane lines as an intermediary element to bridge the gap between physical lane lines and vehicle guidance needs. These virtual lane lines are generated through coordinate transformation and mathematical modeling, serving as a mediator that provides continuous guidance information even when physical lane lines are absent at intersections.
Solution Approach 2:
The patent transforms the guidance problem from a two-dimensional lane line recognition task into a three-dimensional spatial coordinate transformation problem. By introducing vertical dimension (height/elevation) in the coordinate system and using spatial relationships between roads, the system can generate guidance information in intersections without relying on traditional horizontal lane line markings.
2Adaptability or versatility
If a reference running track is generated to guide vehicles through intersections, then vehicles can pass through intersections without lane lines, but the system complexity increases due to coordinate transformation and real-time tracking
Solution Approach 1:
The patent performs preliminary coordinate transformation and reference track generation before the vehicle actually reaches the intersection. By pre-calculating the virtual lane lines and reference running track based on known road coordinates, the system reduces real-time computational complexity while maintaining guidance accuracy.
Solution Approach 2:
The patent replaces complex mechanical sensor arrays and physical guidance markers with mathematical coordinate transformation algorithms. The virtual lane lines are generated through computational geometry rather than physical infrastructure, reducing both hardware complexity and installation requirements.
Data Source
AI summary
A method, device and system for controlling a vehicle passing through an intersection are provided. The method includes generating a reference running track based on coordinate of first road from which the vehicle is to leave and coordinate of second road into which the vehicle is to enter. The first road and the second road intersect at the intersection through which the vehicle is to pass. The method further includes generating, in real time, a preview track of vehicle based on coordinate of centroid of the vehicle, course of the vehicle and coordinate of the second road, comparing the preview track with the reference running track and acquiring running speed limit and turning angle of the vehicle based on the comparing, and controlling the vehicle to run at the turning angle and a running speed less than or equal to the running speed limit.