Lane Widening Partitioning for Dynamic Vehicle Reference Paths
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Solution Overview
Problem
Existing vehicle lateral positioning assistance systems struggle to accurately determine the end of a widening zone in a traffic lane, leading to poor positioning and increased risk of collision, especially when transitioning between lanes, due to limitations in environmental perception and inability to account for multiple reference paths.
Innovation Solution
A method that partitions the widening zone into two sub-zones based on lateral distance between reference paths and edges, allowing for precise demarcation and adaptation of reference paths during vehicle movement, using vehicle geometry, speed, and traffic conditions to improve path calculation and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the vehicle uses a fixed reference path for lateral positioning, then the positioning is simple to implement, but the vehicle will be incorrectly positioned at the end of the lane widening zone and may collide with other vehicles
Solution Approach 1:
The reference path is made dynamic by determining multiple possible reference paths through the widening zone based on different exit lanes, and selecting the appropriate reference path based on the actual vehicle speed and traffic conditions. This allows the positioning system to adapt to different scenarios rather than following a fixed path, resolving the contradiction between simplicity and accuracy.
Solution Approach 2:
The system changes the parameter of reference path selection based on the vehicle's longitudinal position and speed. By calculating a longitudinal distance from the start of the widening zone and comparing it with the vehicle's actual position, the system selects different reference paths (first or second) to ensure accurate positioning throughout the widening zone, preventing incorrect positioning at the exit.
2Measurement precision
If the vehicle determines the end of the widening zone by detecting lane separation markings, then the positioning accuracy improves, but the system cannot determine the end of the widening zone if markings are not detected
Solution Approach 1:
The system performs preliminary action by determining multiple reference paths through the widening zone in advance, based on the detected start of the widening zone and the desired exit lane. This allows the vehicle to navigate the widening zone accurately even without detecting the end marking, as the reference paths are pre-calculated to lead to the correct exit lane.
Solution Approach 2:
The system introduces an intermediary parameter - the longitudinal distance calculation based on reference paths and edges - to determine the vehicle's position within the widening zone. This intermediary method allows the system to track position and select appropriate reference paths without relying solely on detecting the end marking, thereby improving robustness.
3Ease of operation
If the lateral positioning aid takes a fixed distance from the edge of the traffic lane as the reference path, then the implementation is simple, but the selected path may not be the path desired by the driver and requires manual intervention
Solution Approach 1:
The reference path selection is made dynamic by determining multiple reference paths corresponding to different exit lanes and selecting the appropriate one based on the driver's desired direction and traffic conditions. This allows the system to automatically adapt to the driver's intentions without manual intervention, while still maintaining ease of operation through automated selection logic.
Data Source
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AI summary
The invention relates to a method and a device for partitioning a widened area of a limited traffic lane (201) bounded by two edges (202, 203), a vehicle (101) being able to be driven by a driver in an automated manner along a reference path (212, 213) in said traffic lane (201), said vehicle (101) comprising a lateral positioning aid with respect to the reference path (212, 213). The method detects a lane split, determines a widened area (204), determines a plurality of reference paths (212, 213), and partitions the widened area into a plurality of subareas (207, 208) according to the determined reference paths (212, 213).