Lane Deviation Prevention System with Dynamic Target Point
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Solution Overview
Problem
Conventional traffic lane deviation prevention systems often cause an awkward feeling for drivers due to abrupt steering changes and fail to effectively prevent lane deviation, as they typically set the travel target point at the center of the lane, leading to overshooting and increased risk of crossing over to adjacent lanes.
Innovation Solution
A traffic lane deviation prevention system that detects the traffic line position, determines the likelihood of deviation, and adjusts the travel target point to move towards the center of the lane over time, setting it initially near the side from which deviation is likely to occur, and continues control based on previously detected positions if the line is no longer detected, ensuring smooth re-centering without abrupt changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the travel target point is set at the center of the traffic lane, then the vehicle can be returned to the lane center, but the steering wheel is abruptly turned and the yaw rate and steering wheel torque significantly change causing awkward feeling to the driver
Solution Approach 1:
The system sets the travel target point not directly at the lane center but at a position shifted toward the lane center based on the current deviation amount. This preliminary positioning approach allows the vehicle to gradually return to the lane center rather than making abrupt steering corrections, thereby reducing the awkward feeling while still achieving accurate lane positioning.
Solution Approach 2:
The travel target point position is dynamically adjusted based on the vehicle's current deviation from the lane center. As the vehicle approaches the lane center, the target point continues to move toward the center, creating a smooth, adaptive control trajectory that reduces abrupt steering changes while maintaining positioning accuracy.
2Manufacturing precision
If the vehicle is pulled back to the lane center by self steering control, then the deviation is corrected, but the vehicle meanders between the right and left with respect to the center by overshoot
Solution Approach 1:
The system anticipates potential overshoot by continuously adjusting the travel target point position before the vehicle reaches the lane center. The target point is shifted toward the center based on the current deviation, creating a preemptive counteraction that prevents the vehicle from oscillating around the lane center and maintains stable positioning.
3Loss of time
If the vehicle is allowed to move near the line from which deviation is likely to occur, then the time before deviation is prolonged, but lane deviation cannot sufficiently be prevented
Solution Approach 1:
The system performs preliminary correction by setting the travel target point toward the lane center before the vehicle actually deviates. This proactive approach not only prolongs the time before deviation occurs but also ensures reliable prevention by continuously guiding the vehicle back toward the lane center, achieving both extended time margin and high prevention effectiveness.
Data Source
AI summary
A traffic lane deviation preventing system includes a traffic line detecting unit for detecting traffic line positions on a road, a control unit for determining a possibility of a vehicle's deviation from a traffic line based on the traffic line positions detected by the traffic line detecting unit and setting a travel target point to which the vehicle is to travel if it is determined that there is a possibility of a traffic line deviation. The control unit moves the travel target point toward the center of a traffic lane according to the passage of a control operation time.