Crossing-Target Driving Assist Boundary for Fewer False Interventions
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Solution Overview
Problem
Existing driving assist control systems operate unnecessarily when the possibility of collision with a crossing target ahead of a vehicle is low, leading to a sense of strangeness or annoyance for the vehicle occupant, as they do not differentiate between the direction of movement of the target relative to the vehicle.
Innovation Solution
A driving assist system that sets a narrower assist area on the second side of the vehicle, with the assist end boundary positioned between the vehicle and the second roadway boundary, and adjusts the assist area widths asymmetrically to minimize unnecessary operations based on the target's direction of movement, ensuring timely activation and deactivation of assist controls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the assist area is set to cover the entire roadway area for collision avoidance, then the safety of the vehicle is improved, but the driving assist control operates unnecessarily when the target moves away from the vehicle, causing a sense of strangeness or annoyance to the occupant
Solution Approach 1:
The assist area is divided into different regions with different assistance levels. The first region (between first roadway boundary and assist end boundary) provides full driving assist control, while the second region (between assist end boundary and second roadway boundary) provides reduced or no assistance. This local differentiation allows the system to maintain safety in critical areas while avoiding unnecessary operations in areas where the target is moving away from the vehicle.
Solution Approach 2:
The roadway area is segmented into multiple assist areas based on the target's movement direction and collision risk. The processor divides the assist area into a first assist area and a second assist area, applying different control strategies to each segment. This segmentation enables the system to respond appropriately to different situational contexts within the overall roadway area.
2Device complexity
If the assist area is set to be symmetric on both sides of the vehicle, then the control logic is simple, but it cannot differentiate between targets moving toward or away from the vehicle, leading to unnecessary operations
Solution Approach 1:
The assist area is configured asymmetrically with respect to the vehicle's longitudinal axis. The assist end boundary is positioned at a different distance from the vehicle on the second side compared to the first side. This asymmetric configuration allows the system to differentiate between targets moving toward the vehicle (higher collision risk) and targets moving away (lower collision risk), enabling more accurate and context-appropriate collision avoidance operations.
Data Source
AI summary
A driving assist system executes driving assist control for avoiding a collision with a target ahead of a vehicle. The driving assist control operates when the target exists within an assist area. First and second roadway boundaries of a roadway area are located on first and second sides as viewed from the vehicle, respectively. A crossing target is the target crossing the roadway area ahead of the vehicle from the first side toward the second side. The assist area for the crossing target is an area between an assist start boundary located on the first side as viewed from the vehicle and an assist end boundary located on the second side as viewed from the vehicle. The driving assist system sets the assist end boundary at a position between the vehicle and the second roadway boundary of the roadway area.