Curve Lane Position Adaptive Collision Avoidance Thresholds
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Solution Overview
Problem
Existing collision avoidance assist systems often perform unnecessary operations when a vehicle is driving on a curve, as they rely on fixed threshold values for time to collision, which can lead to both false alarms and delayed responses in actual collision scenarios.
Innovation Solution
A collision avoidance assist apparatus that adjusts its operating conditions based on whether the host vehicle is driving on the inner or outer lane compared to another vehicle on a curve, by setting different threshold values for time to collision, making the operation more easily satisfied when driving on the outer lane and harder to satisfy when driving on the inner lane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed threshold value for time to collision is used, then the system is simple to operate, but unnecessary operations occur on curves and actual collision risks may be missed
Solution Approach 1:
The patent applies dynamics by making the operating conditions changeable based on driving conditions. Specifically, the system dynamically adjusts the time to collision threshold and other operating conditions according to whether the host vehicle is on a curve or straight road, and according to the relative position (inner or outer lane) of the host vehicle. This allows the system to adapt to different scenarios rather than using a fixed threshold, thereby improving reliability while maintaining ease of operation through automated adjustment.
Solution Approach 2:
The patent implements parameter changes by modifying the time to collision threshold and other operating parameters based on the detected driving scenario. When the host vehicle is on a curve and determined to be on the inner lane, the system adjusts the time to collision threshold to a longer period, making the operating condition harder to satisfy and preventing false alarms. Conversely, when on the outer lane or on straight roads, different parameter settings are applied to ensure timely collision avoidance.
2Speed
If the operating condition is made easier to satisfy, then collision avoidance response is faster, but false alarms increase on curves
Solution Approach 1:
The patent applies local quality by implementing different operating conditions for different spatial locations and scenarios. Specifically, the system determines whether the host vehicle is on the inner or outer lane relative to another vehicle on a curve, and applies different time to collision thresholds and operating conditions accordingly. This localized approach ensures that the operating condition is appropriately strict or lenient based on the specific spatial context, preventing false alarms on inner lanes while maintaining fast response on outer lanes and straight roads.
3Reliability
If the system performs collision avoidance on all detected objects, then collision protection is maximized, but unnecessary operations occur when lanes do not cross
Solution Approach 1:
The patent applies segmentation by dividing the collision avoidance decision-making process into distinct scenarios based on lane configuration. The system segments the driving environment into cases where the host vehicle is on the inner lane versus the outer lane relative to another vehicle, and applies different operating conditions to each segment. This segmentation allows the system to selectively activate collision avoidance only when necessary (when lanes may cross) while suppressing unnecessary operations in scenarios where lane crossing is not possible.
Data Source
AI summary
A collision avoidance assist apparatus is provided with: a determinator configured to determine whether or not one lane on which a host vehicle drives is inner than another lane that extends along the one lane and that a moving body exists, in a curve section, if there is the curve section ahead in a travel direction of the host vehicle; and a changer configured to change an operating condition for a collision avoidance operation such that a first condition, which is the operating condition in a first case in which it is determined that the one lane is not inner than the other lane in the curve section, is more easily satisfied than a second condition, which is the operating condition in a second case in which it is determined that the one lane is inner than the other lane in the curve section.