Lane Deviation Prevention Control Using Dynamic Thresholds
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Solution Overview
Problem
Existing lane deviation prevention control systems for vehicles fail to initiate corrective action when a vehicle has already deviated from its lane, especially in situations where an approaching vehicle is present on the adjacent lane, leading to safety concerns.
Innovation Solution
A lane deviation prevention control device that includes an exterior information detector and a lane deviation prevention control start determiner, which detects approaching vehicles on adjacent lanes and determines whether to initiate the lane deviation prevention control based on the vehicle's relative-to-lane yaw angle and lateral position, even if the vehicle has already deviated, using thresholds and sensor data to ensure safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lane deviation prevention control is not started after the vehicle has deviated from the lane, then false prevention control can be avoided, but safety is compromised when approaching vehicles are present
Solution Approach 1:
The control start determination is made dynamic by adjusting the lateral position threshold based on the presence of approaching vehicles. When an approaching vehicle is detected, the threshold is increased to allow control activation even after lane deviation, whereas without approaching vehicles, the threshold remains strict to prevent false controls.
Solution Approach 2:
The lateral position threshold parameter is changed adaptively based on the detection result of approaching vehicles. The threshold is not fixed but varies according to the traffic environment, allowing the system to optimize between false prevention and actual collision risk based on real-time conditions.
2Reliability
If the lateral position threshold is set low, then false prevention control is avoided, but the system cannot respond in time when vehicles are approaching
Solution Approach 1:
The threshold is made dynamic rather than static, allowing it to adjust based on the presence of approaching vehicles. This enables the system to maintain high accuracy under normal conditions while responding quickly when collision risk is present.
Solution Approach 2:
The system performs preliminary detection of approaching vehicles and pre-adjusts the threshold accordingly. By detecting the approaching vehicle in advance and setting a higher threshold before lane deviation occurs, the system prepares for potential control activation, reducing response time when deviation actually happens.
3Object-affected harmful factors
If the lane deviation prevention control is activated after lane deviation, then collision prevention is improved, but false prevention control may occur
Solution Approach 1:
The lateral position threshold parameter is changed based on the detection result of approaching vehicles. When approaching vehicles are detected, the threshold is increased to allow post-deviation control activation. When no approaching vehicles are present, the threshold remains low to prevent false controls.
Solution Approach 2:
The control activation criteria are made local to the specific situation by considering the presence of approaching vehicles. The threshold is not uniformly applied but is customized based on the local traffic environment, allowing different activation conditions for different scenarios.
Data Source
AI summary
A lane deviation prevention control device for a vehicle includes an exterior information detector and a lane deviation prevention control start determiner. The lane deviation prevention control start determiner determines to start a lane deviation prevention control even when an own vehicle has already deviated from an own lane on which the own vehicle is traveling, on the condition that the exterior information detector detects an approaching vehicle that is approaching the own vehicle, on an adjacent lane on deviation side on which deviation is taking place, and that a lateral position of the own vehicle is equal to or smaller than a control start threshold.