Collision Avoidance Assistance Device Using Road Shape Recognition
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Solution Overview
Problem
Existing collision avoidance systems struggle to accurately estimate vehicle paths on changing road shapes, leading to erroneous assistance and delayed intervention, especially when encountering obstacles outside curves or at intersections.
Innovation Solution
A collision avoidance assistance device that includes a road shape recognition unit, path estimation unit, obstacle situation recognition unit, and assistance determination units, which consider road shapes and driver line of sight to improve path estimation accuracy and execute early assistance while preventing erroneous interventions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If early assistance execution is attempted without considering road shape, then assistance timing is improved, but false assistance to obstacles outside the road increases
Solution Approach 1:
The road shape recognition unit performs preliminary recognition of the road shape before path estimation is executed. This preliminary action allows the system to pre-establish the expected vehicle path along the road, enabling more accurate determination of whether detected obstacles are truly on the vehicle's trajectory. The system proactively identifies road geometry (curves, intersections, straight sections) and uses this information to filter out obstacles that appear threatening but are actually outside the drivable path.
2Reliability
If strict determination conditions are set to avoid false assistance, then false assistance is reduced, but early assistance execution is delayed
Solution Approach 1:
The system dynamically adjusts determination parameters based on the recognized road shape. When the vehicle is on a straight road section, the system may use stricter distance thresholds. When on a curve or approaching an intersection, the system adapts the determination parameters to account for the changed geometry, allowing earlier assistance when the road shape indicates higher risk. This parameter adaptation enables the system to maintain reliability while reducing unnecessary delays in assistance execution.
3Device complexity
If path estimation is based only on vehicle position and direction change, then system complexity is reduced, but path estimation accuracy deteriorates
Solution Approach 1:
The road shape recognition unit acts as an intermediary between the vehicle's current state (position and direction) and the path estimation function. Instead of directly estimating the path from raw vehicle data alone, the system first recognizes the road shape as an intermediate representation, then combines this with vehicle state information to produce the final path estimation. This intermediary step provides contextual information about the drivable path that cannot be derived from vehicle kinematics alone, significantly improving accuracy without requiring complex sensor systems.
Data Source
AI summary
A collision avoidance assistance device includes a road shape recognition unit that recognizes a road shape of a traveling road, a path estimation unit that estimates a path of the host vehicle based on the road shape, an obstacle situation recognition unit recognizes an obstacle situation surrounding the host vehicle including at least a relative position of the obstacle with respect to the host vehicle, an early avoidance assistance determination unit that determines a need for early avoidance assistance for avoiding collision between the host vehicle and the obstacle from a distance between the host vehicle and the obstacle on the path of the host vehicle based on the path of the host vehicle and the obstacle situation, and a collision avoidance assistance execution unit executes the early avoidance assistance in a case where the early avoidance assistance determination unit determines that the early avoidance assistance is needed.