Target Traveling Line Control Between Lane Center and Adjacent Vehicles
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Solution Overview
Problem
Existing vehicle driving support devices struggle to set an appropriate target traveling line when there are multiple targets, such as lane markings and adjacent vehicles, that the vehicle needs to maintain a safe distance from, potentially leading to excessive deviation from the lane center.
Innovation Solution
A vehicle driving support device that sets left and right limit lines based on predetermined separation distances from targets, including lane markings and adjacent vehicles, and adjusts the target traveling line to ensure safe distances are maintained from all relevant targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the target traveling line is set to the lane center line, then the vehicle can maintain proper lane positioning, but the vehicle may not maintain adequate distance from other vehicles traveling in adjacent lanes
Solution Approach 1:
The target traveling line is dynamically adjusted based on the positions of adjacent vehicles. When vehicles are detected in adjacent lanes, the target line shifts from the lane center toward the adjacent vehicle while maintaining a predetermined safe distance. This dynamic adjustment allows the system to adapt to changing traffic conditions and maintain both lane positioning accuracy and safety distances simultaneously.
2Reliability
If the target traveling line is offset to maintain distance from adjacent vehicles, then safety distance is improved, but the vehicle may deviate excessively from the lane center
Solution Approach 1:
The offset amount is locally adjusted based on the specific situation. The target traveling line is offset by a predetermined distance only when adjacent vehicles are detected, and the offset magnitude is controlled to maintain the safe distance while minimizing deviation from the lane center. This localized adjustment ensures safety without excessive lane positioning error.
3Reliability
If multiple limit lines are set based on multiple targets, then comprehensive safety is improved, but the target settable range may be excessively restricted
Solution Approach 1:
When multiple adjacent vehicles are detected, the system extracts and prioritizes the most critical safety constraint. Instead of creating separate limit lines for each vehicle that would overly restrict the target settable range, the system identifies the vehicle posing the greatest safety concern and sets the target line primarily relative to that vehicle, maintaining appropriate distance from other vehicles through controlled offset adjustments.
Data Source
AI summary
A vehicle driving support device: sets a left limit line extending along a current lane and passing through a position distanced in a right direction from a left-side target by a predetermined distance as a left end line, and sets a right limit line extending along the current lane and passing through a position distanced in a left direction from a right-side target by a predetermined distance as a right end line; and sets a lane center line as a target traveling line when the lane center line is located between the right and left end lines, and sets a line closer to the lane center line as the target traveling line when the lane center line is not located between the right and left end lines, in a case where the left end line and the right end line are set in a left-to-right order.