Lane Positioning Control Using Road Marking Offset Distances
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Solution Overview
Problem
Current vehicle positioning systems for autonomous driving cause driver anxiety due to frequent trajectory adjustments and reliance on complex object detection, especially in dense traffic scenarios, and fail to provide a simple, reliable method for maintaining safe lateral distances.
Innovation Solution
A method using a vehicle-mounted camera to identify road marking lines, classify lane types, and adjust vehicle positioning based on configurable offset distances from lane edges, independent of detected objects, ensuring safe lateral positioning through image processing and electric power steering control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle positions itself in the middle of the lane using object detection, then lateral positioning control is achieved, but driver anxiety increases due to frequent trajectory adjustments
Solution Approach 1:
The patent extracts the dependency on complex object detection and trajectory adjustment by introducing a fixed offset distance from the lane marking line. Instead of continuously detecting objects and adjusting trajectory, the system simply maintains a predetermined offset distance, eliminating frequent swerving while preserving lateral positioning reliability
Solution Approach 2:
The patent changes the positioning parameter from dynamic trajectory adjustment to a fixed offset distance from the lane marking line. This parameter change simplifies the control strategy, reducing frequent adjustments while maintaining reliable lateral positioning and improving driver comfort
2Reliability
If the system uses complex object detection and multiple sensors to maintain safe lateral distance, then safety is improved, but system complexity increases
Solution Approach 1:
The patent extracts and removes the complex object detection system and multiple sensors (radar, LIDAR, ultrasonic sensors) from the lateral positioning system. By relying solely on camera-based lane marking detection with a fixed offset distance, the system maintains safe lateral distance while dramatically reducing system complexity
Solution Approach 2:
The patent replaces expensive, complex detection systems with a simpler, more economical camera-based solution. The camera system detects lane markings and applies a fixed offset, providing adequate safety without the need for costly radar, LIDAR, or ultrasonic sensors
3Stability of the object's composition
If the vehicle maintains fixed positioning in the lane, then trajectory stability is improved, but adaptability to nearby objects decreases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and maintaining a fixed offset distance from the lane marking line that inherently provides safe lateral clearance from nearby objects. This predetermined offset ensures both trajectory stability and adequate safety margins without requiring real-time adaptation to detected objects
Data Source
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AI summary
Disclosed is a method for controlling the positioning of a motor vehicle (10) on a road (1) comprising several traffic lanes defined laterally by road marking lines (16), comprising: receiving a signal originating from a camera (20) equipping the vehicle, analysing the signal in order to detect the road marking lines, identifying, according to a predefined classification of the types of road marking lines, the type of lines detected defining the vehicle's current traffic lane, determining characteristics of the current traffic lane depending on the type of road marking lines defining it and, if the current traffic lane is one of the left-most lane (13) or the right-most lane (11) in the vehicle's direction of travel, shifting the vehicle towards the distal edge (14,15) of the road relative to the central axis of the current traffic lane.