Collision Avoidance Route Control for Secondary Obstacle Detection
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Solution Overview
Problem
Conventional collision avoidance assist systems fail to effectively prevent secondary collisions by not initiating assistance early enough, leading to high vehicle speeds and insufficient deceleration, which can result in collisions with secondary obstacles when the driver is unable to react in time.
Innovation Solution
A collision avoidance assist apparatus that includes obstacle detection, alert systems, avoidance route calculation, automatic brake and turn controls, post-avoidance route calculation, and collision determination to prevent secondary collisions by calculating a post-avoidance route and prohibiting automatic turn controls when a secondary obstacle is detected on this route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the collision avoidance assist control is started early to ensure sufficient deceleration, then the vehicle can be adequately decelerated, but the driver feels discomfort when the control starts before the driver recognizes the obstacle
Solution Approach 1:
The system performs preliminary actions by calculating the post-avoidance route and detecting secondary obstacles before the vehicle actually reaches them. This allows the system to prepare and prohibit automatic turn controls in advance, ensuring sufficient deceleration and avoiding secondary collisions while maintaining driver comfort by only intervening when necessary.
2Extent of automation
If the collision avoidance assist control is stopped when the probability of collision with the first obstacle disappears, then the driving operations are entrusted to the driver, but there is not enough time for the driver to avoid collision with secondary obstacles
Solution Approach 1:
The system calculates the post-avoidance route and detects secondary obstacles in advance before the collision avoidance assist control is terminated. This preliminary detection and calculation allow the system to maintain reliable secondary collision prevention even after the primary collision threat is resolved and control is returned to the driver.
3Reliability
If the automatic steering control changes the traveling direction to avoid the first obstacle, then the collision with the first obstacle is avoided, but the vehicle may approach secondary obstacles on the new path
Solution Approach 1:
The system continuously monitors the post-avoidance route for secondary obstacles after the automatic steering control changes the traveling direction. This feedback mechanism detects potential secondary collision risks and prohibits automatic turn controls when secondary obstacles are present, ensuring that the avoidance maneuver does not create new hazards.
Solution Approach 2:
The system takes preliminary anti-action by prohibiting automatic turn controls when secondary obstacles are detected on the post-avoidance route. This prevents the vehicle from making additional steering movements that could lead to secondary collisions, countering the potential harmful effect of the initial avoidance maneuver.
Data Source
AI summary
An avoidance route calculation part calculates an avoidance route for avoiding a collision between an own vehicle and an obstacle through a collision avoidance assist control (an automatic brake control and an automatic steering control). A post-avoidance route calculation part calculates a post-avoidance route. A post-avoidance route collision determination part determinates whether a secondary obstacle is present on the post-avoidance route. When the secondary obstacle is determined to be present, the automatic steering control is prohibited from being performed.