Alternate Anchor Line Generation for Vehicle Control
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Solution Overview
Problem
Vehicles face poor control and inaccurate lane detection when the primary anchor line is unsuitable or unusable, leading to potential safety issues and incorrect alerts during autonomous or semi-autonomous operation.
Innovation Solution
A method is implemented to generate an alternate anchor line based on lane line quality and weight indicators, using coefficients of a lane center calculation or a virtual anchor line, which is validated against a map to ensure accurate vehicle control when the primary anchor line is insufficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system uses the primary anchor line for vehicle control, then the control accuracy is improved, but the reliability deteriorates when the primary anchor line is unsuitable or unusable
Solution Approach 1:
The patent introduces an alternate anchor line as an intermediary solution when the primary anchor line becomes unsuitable. The system detects the quality and suitability of the primary anchor line, and when it fails to meet criteria, automatically switches to an alternate anchor line derived from map data or other sources, ensuring continuous reliable vehicle control without interruption
Solution Approach 2:
The system prepares alternate anchor line data in advance from map information before the primary anchor line becomes unusable. By pre-calculating and storing alternate anchor lines, the system ensures immediate switching capability when the primary anchor line quality deteriorates, preventing control failures rather than reacting to them
2Reliability
If the system generates an alternate anchor line when the primary is insufficient, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The system dynamically adjusts the anchor line selection based on real-time conditions. It continuously monitors the quality indicators of the primary anchor line and dynamically switches between primary and alternate anchor lines as needed, rather than using a static approach. This dynamic adaptation maintains reliability while managing complexity through conditional logic
3Measurement precision
If the system validates the alternate anchor line against a map, then the measurement precision is improved, but the loss of time increases
Solution Approach 1:
The system performs preliminary validation of alternate anchor lines against map data in advance, before they are needed for control. By pre-validating and caching verified alternate anchor lines, the system reduces the time required during actual switching operations, as the validation work has already been completed beforehand
Data Source
AI summary
Examples of techniques for controlling a vehicle using an anchor line are disclosed. In one example implementation, a computer-implemented method includes receiving a lane line quality indicator from a camera associated with a vehicle. The method further includes determining a lane line weight. The method further includes comparing the lane line quality indicator to a quality threshold to determine whether the lane line is of sufficient quality to use as an anchor line. The method further includes comparing the lane line weight to a confidence threshold to determine whether the lane line is of sufficient confidence to use as the anchor line. The method further includes, responsive to determining that at least one of the lane line is not of sufficient quality and the lane line is not of sufficient weight, generating an alternate anchor line. The method further includes controlling the vehicle using the alternate anchor line.