Collision Avoidance Assist Timing Based on Driver Self-Avoidance
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Solution Overview
Problem
Existing vehicle collision avoidance systems struggle to determine the optimal timing for initiating collision avoidance controls without causing discomfort to the driver, as starting too early can lead to unnecessary interventions, and starting too late may result in collisions.
Innovation Solution
The system assesses the driver's ability to avoid a collision through grasping state and consciousness, adjusting the start timing of collision avoidance controls based on the driver's self-avoidance probability to ensure timely intervention without discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the collision avoidance control is started at an early timing, then the collision avoidance reliability is improved, but the driver discomfort increases
Solution Approach 1:
The system changes the start timing parameter of collision avoidance control based on the driver's state parameters (grasping state, consciousness state). When the driver's capability is assessed as low, the control starts earlier; when assessed as high, the control starts later. This dynamic parameter adjustment resolves the contradiction by adapting the timing to specific driver conditions.
Solution Approach 2:
The system makes the collision avoidance control start timing dynamic rather than fixed, by continuously monitoring driver state and adjusting the intervention timing accordingly. This allows the system to optimize between early intervention (for safety) and late intervention (for driver comfort) based on real-time driver capability assessment.
2Object-affected harmful factors
If the collision avoidance control is started at a late timing, then the driver discomfort is reduced, but the collision avoidance reliability deteriorates
Solution Approach 1:
The system adjusts the control start timing parameter based on driver state assessment. When driver capability is high, timing is delayed for comfort; when capability is low, timing is advanced for safety. This resolves the contradiction by making timing contingent on driver state rather than fixed.
Solution Approach 2:
The system implements dynamic timing adjustment by continuously monitoring driver grasping state and consciousness state, then adapting the collision avoidance control start timing accordingly. This ensures reliability is maintained while minimizing unnecessary early interventions.
3Productivity
If the collision avoidance control is executed unnecessarily, then the driver discomfort increases, but the collision avoidance frequency increases
Solution Approach 1:
The system uses feedback from driver state monitoring (grasping state detection, consciousness state detection) to determine whether to execute collision avoidance control. This feedback mechanism prevents unnecessary executions when the driver is capable of self-avoidance, thereby reducing discomfort while maintaining appropriate intervention frequency.
Solution Approach 2:
The system applies partial action by selectively executing collision avoidance control only when the driver's self-avoidance capability is insufficient. Rather than always executing or never executing, the system executes partially based on assessed need, optimizing between safety interventions and driver comfort.
Data Source
AI summary
A vehicle collision avoidance assist apparatus executes a collision avoidance control for avoiding a collision of an own vehicle with an object ahead of the own vehicle. The apparatus determines whether a driver of the own vehicle has a collision self-avoidance probability that the driver can avoid the collision of the own vehicle with the object ahead of the own vehicle by carrying out a driving operation to the own vehicle. When the apparatus determines that the driver does not have the collision self-avoidance probability, the apparatus sets a start timing of starting executing the collision avoidance control to a timing earlier than the start timing set when the apparatus determines that the driver has the collision self-avoidance probability.