Object-Based Lane Keeping Assist With Dynamic Trigger Line Shifting
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Solution Overview
Problem
Conventional lane keeping assist systems are error-prone and lack redundancy, particularly in autonomous driving scenarios, necessitating additional safety measures to prevent unintentional lane departures and account for surrounding objects.
Innovation Solution
An object-based lane keeping assist system utilizing sensors to detect relative vehicle positions and objects in adjacent lanes, triggering steering interventions and dynamically shifting trigger lines to maintain safety, which can be integrated with existing lane keeping functions to enhance safety by considering lateral and longitudinal distances, object types, and traffic dynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lane keeping assist functions are used, then basic lane keeping capability is provided, but the system is error-prone and lacks redundancy
Solution Approach 1:
The patent combines multiple sensor types (first sensor for lane detection, second sensor for object detection) and integrates them with existing lane keeping functions to create a redundant system. This merging of detection capabilities and processing functions increases reliability without requiring completely separate systems.
Solution Approach 2:
The system performs preliminary detection of objects in adjacent lanes using the second sensor before lane departure occurs. By detecting potential hazards in advance and adjusting the trigger line proactively, the system prevents errors before they affect lane keeping reliability.
2Adaptability or versatility
If the trigger line is fixed, then the lane keeping function operates simply, but it cannot adapt to objects in adjacent lanes
Solution Approach 1:
The trigger line is implemented as a dynamic element that can be shifted laterally based on detected objects. When the second sensor detects an object in an adjacent lane, the control unit shifts the trigger line to account for the object's position, allowing the system to adapt to changing traffic conditions while maintaining a relatively simple overall structure.
3Reliability
If steering intervention is triggered early, then lane departure is prevented, but unnecessary interventions may occur due to objects in adjacent lanes
Solution Approach 1:
The system continuously monitors the position of objects in adjacent lanes using the second sensor and adjusts the trigger line position accordingly. This feedback mechanism ensures that steering interventions are triggered only when truly necessary, preventing both premature and unnecessary interventions while maintaining accurate lane departure prevention.
Data Source
AI summary
An object-based lane-keeping-assist for a vehicle, including a first sensor, a second sensor, and a lane keeping function. The first sensor determines a relative position of the vehicle with respect to a lane. The second sensor detects a position of an object in an adjacent lane. The lane keeping function keeps the vehicle around a default line in the lane. The lane-keeping-assist includes a control unit having a processor and a memory with stored instructions that, when executed on the processor, cause the following: triggering a steering intervention when a distance between a vehicle side and a trigger line is below a predetermined threshold indicating an unintended lane departure of the vehicle; completing the steering intervention, when the default travel line of the lane keeping function has been reached; and shifting the trigger line when the second sensor has detected the object in the adjacent lane.