Lane-Centering Steering Control for Hands-Off Mode Release
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Solution Overview
Problem
Current autonomous driving systems face challenges in handling sudden releases of autonomous driving mode, leading to potential lane departure accidents when drivers fail to hold the steering wheel.
Innovation Solution
A driver assistance apparatus and method that uses a camera to determine boundary lines and control the vehicle's steering, extending the driving zone when the driver is not holding the steering wheel, and gradually widening it to prevent accidents, while maintaining or ending autonomous driving mode based on the driver's input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If autonomous driving mode is released when lane centering control is being operated, then the autonomous driving system can respond to driver input, but the sudden release may make the driver unable to cope with unexpected situations
Solution Approach 1:
The system performs preliminary actions by detecting when the driver's hands are away from the steering wheel and proactively adjusting the autonomous driving mode transition timing. The controller monitors driver state and delays mode release until the driver is ready, preventing sudden transitions that would compromise driver coping ability.
Solution Approach 2:
The system dynamically adjusts the autonomous driving mode transition based on real-time driver state detection. The mode release timing is not fixed but adapts according to whether the driver is holding the steering wheel, creating a dynamic response that balances operational responsiveness with driver safety.
2Speed
If the autonomous driving mode is suddenly released, then the system can quickly respond to driver needs, but it may cause lane departure accidents
Solution Approach 1:
The system detects driver hand position in advance and uses this information to determine the appropriate timing for mode release. By performing preliminary detection of driver state, the system ensures that mode release only occurs when the driver is ready to take control, preventing sudden releases that could cause lane departure.
Solution Approach 2:
The driver's hand position on the steering wheel serves as an intermediary condition that mediates between the autonomous driving mode and manual control mode. The system uses this intermediary signal to determine when it is safe to transition modes, ensuring that the transition occurs only when the driver is physically ready to assume control.
3Reliability
If the vehicle operates with strict lane boundary constraints, then lane departure is prevented, but the driving experience becomes overly restrictive
Solution Approach 1:
The lane boundary constraints are made dynamic rather than static. The system adjusts the strictness of lane keeping assistance based on whether the driver is holding the steering wheel. When the driver's hands are detected on the wheel, the system allows more flexibility; when hands are away, it enforces stricter constraints to prevent lane departure.
Solution Approach 2:
The system changes operational parameters (lane keeping assistance level) based on driver state. The boundary enforcement parameter is adjusted according to whether the driver is monitoring the road via hand-on-steering-wheel detection, allowing the system to balance safety and driving flexibility through parameter modification.
Data Source
AI summary
Provided is a driver assistance apparatus, including: a camera mounted on a vehicle and configured to have a front field of view of the vehicle and acquire image data; and a controller including a processor configured to process the image data, wherein the controller is configured to: determine a pair of boundary lines based on the processing of the image data, control a steering device of the vehicle so that the vehicle travels within a zone defined by the pair of boundary lines, based on the vehicle being deviated from the zone, and change the pair of boundary lines to extend the zone, based on a driver not holding a steering wheel.