Lane-Keeping Assistance Using Trajectory Intersection Analysis
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Solution Overview
Problem
Existing lane departure warning systems often provide inappropriate warnings or interventions, particularly when the driver intentionally changes lanes, leading to customer dissatisfaction.
Innovation Solution
A method and system that suppresses lane departure warnings by detecting intended trajectory shortening, such as cutting curves, by analyzing driving state and surroundings information to determine lane departure and return situations, and emitting appropriate assistance signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lane departure warning systems provide early warnings or steering interventions, then safety is improved, but driver satisfaction deteriorates due to inappropriate warnings during intentional lane changes
Solution Approach 1:
The system performs preliminary analysis of the driving trajectory and lane trajectory to predict future lane departure situations before they occur. By calculating intersection points between the current driving trajectory and the lane trajectory, the system can anticipate whether a lane departure is intentional (cutting curve) or unintentional, and only issue warnings for genuine safety concerns, thereby avoiding false alarms that reduce driver satisfaction
Solution Approach 2:
The system continuously monitors driving state measurement signals and surroundings information signals, comparing the actual driving trajectory with the lane trajectory in real-time. This feedback mechanism allows the system to adapt its warning behavior based on the driver's actual intentions, suppressing warnings when the trajectory analysis indicates an intentional lane change while maintaining warnings for unintentional departures
2Ease of operation
If the system suppresses warnings during intentional trajectory shortening, then driver satisfaction is improved, but the complexity of trajectory analysis increases
Solution Approach 1:
The trajectory analysis is segmented into distinct components: detecting driving state measurement signals, ascertaining driving trajectory from these signals, detecting surroundings information signals, ascertaining lane trajectory from these signals, and calculating intersection points between the two trajectories. This segmentation transforms a complex monolithic analysis into manageable modular steps, making the system more implementable while maintaining the capability to distinguish intentional from unintentional lane changes
Solution Approach 2:
The system introduces an intermediary analysis layer that computes intersection points between the driving trajectory and lane trajectory as a mediator between raw sensor data and warning decisions. This intermediary calculation simplifies the overall decision-making process by providing a clear geometric criterion for determining whether a lane departure is intentional, reducing the complexity of the final warning suppression logic
3Measurement precision
If the system analyzes driving state and surroundings signals to determine lane departure situations, then warning accuracy is improved, but processing time increases
Solution Approach 1:
The system performs preliminary ascertainment of driving trajectory from driving state measurement signals and lane trajectory from surroundings information signals before the actual lane departure occurs. By pre-calculating the trajectories and their intersection points, the system reduces the processing burden during critical moments, enabling accurate real-time warnings without excessive processing delays
Data Source
AI summary
A method for assisting a driver of a vehicle in maintaining a lane includes: detecting driving state measurement signals of a vehicle; ascertaining a driving trajectory of the vehicle based on the detected driving state measurement signals; detecting surroundings information signals of the vehicle; ascertaining a lane trajectory of the lane based on the surroundings information signals; ascertaining points of intersection of the ascertained driving trajectory with the ascertained lane trajectory; determining, based on the ascertained points of intersection, whether a lane return situation is present in connection with a determined a lane departure situation; and emitting a signal to effectuate an assistance of the driver in maintaining the lane based on the determination.