Lane Departure Warning Using Dynamic Warning Area Calculation
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Solution Overview
Problem
Existing lane departure warning technologies for autonomous driving lack the ability to provide warnings that are tailored to the degree of lane departure and associated risk, failing to offer a scene-specific and emergency-degree warning prompt.
Innovation Solution
A lane departure warning method and system that calculates a warning area based on various factors such as transverse acceleration, lane width, road curvature, transverse velocity, driver torque, and staying time, allowing for a modified lane line to define the warning area and trigger appropriate warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed lane line is used for lane departure warning, then the warning threshold is simple to determine, but it cannot adapt to different driving conditions and driver behaviors
Solution Approach 1:
The patent applies dynamics by making the lane line dynamic instead of fixed. The lane line is adjusted in real-time based on vehicle transverse acceleration, staying time in lane, and other driving conditions. This allows the warning threshold to adapt to different driving scenarios while maintaining a manageable system complexity through structured adjustment rules.
Solution Approach 2:
The patent changes the parameters used for lane line determination from static to dynamic. By incorporating transverse acceleration, staying time, and other varying parameters, the system adapts to different driving conditions. The complexity is controlled by using a finite set of measurable vehicle parameters and predefined adjustment rules.
2Reliability
If lane departure warning is provided only when vehicle departs from lane line, then the warning system is simple, but it cannot provide timely warning for potential lane departure
Solution Approach 1:
The patent implements preliminary action by calculating a warning area in advance based on vehicle dynamics parameters such as transverse acceleration and staying time. This allows the system to warn drivers before actual lane departure occurs, improving timeliness. The complexity is managed by using a structured approach to define the warning area based on measurable vehicle states.
3Measurement precision
If multiple parameters are used to calculate departure value, then the lane departure estimation is more accurate, but the calculation complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the departure value calculation into distinct components: transverse acceleration component, staying time component, and other parameter components. Each component is calculated separately and then combined, which improves estimation precision while managing complexity through modular calculation structure.
Data Source
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AI summary
A lane departure warning method and a lane departure warning system are discloses. The lane departure warning method: a warning area calculation step (S100) in which a warning area for lane departure of a vehicle is calculated based on information about the vehicle and information around the vehicle; a decision making step (S200) in which a current position of the vehicle is compared with the warning area calculated in the warning area calculation step, to determine whether the vehicle is located in the warning area and output a decision instruction; and a warning step (S300) in which a warning action is performed based on the decision instruction. Accordingly, a lane departure status of the vehicle can be more accurately estimated and timely warning can be performed when there is a tendency for lane departure.