Collision Avoidance Timing Based on Driver Self-Avoidance Probability
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Solution Overview
Problem
Existing vehicle collision avoidance assist systems face challenges in determining the optimal timing for initiating collision avoidance controls without causing driver discomfort, as starting too early can lead to unnecessary interventions and starting too late may result in collisions.
Innovation Solution
A vehicle collision avoidance assist apparatus that uses an electronic control unit to assess the driver's collision self-avoidance probability based on grasping state, consciousness state, and steering wheel interaction to adjust the timing of collision avoidance controls, initiating them earlier when the driver's probability of avoiding a collision is low and later when it is high.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the collision avoidance control is started at an early timing, then the collision of the own vehicle with the forward object can be surely avoided, but the driver may feel discomfort due to unnecessary intervention
Solution Approach 1:
The system changes the start timing parameter of collision avoidance control based on the driver's state. When the driver is determined to be in a state with low collision self-avoidance probability (e.g., drowsy, distracted), the control starts earlier to ensure safety. When the driver is in a normal state with high self-avoidance probability, the control starts later to avoid unnecessary intervention and maintain driver comfort.
Solution Approach 2:
The start timing of collision avoidance control is made dynamic rather than fixed. The electronic control unit continuously monitors the driver's state and adjusts the control start timing in real-time based on the assessed collision self-avoidance probability, allowing the system to adapt between early intervention and late intervention scenarios.
2Ease of operation
If the collision avoidance control is started at a late timing, then driver discomfort is minimized, but the collision may not be avoided even when control is executed
Solution Approach 1:
The system adjusts the start timing parameter dynamically based on driver assessment. When the driver shows signs of reduced awareness or capability (low collision self-avoidance probability), the system advances the control start timing to ensure sufficient response time for avoidance, preventing collisions that would occur with late timing.
Solution Approach 2:
The system performs preliminary assessment of the driver's collision self-avoidance probability before determining the optimal start timing. By evaluating the driver's state in advance (through monitoring steering operations, eye movements, or other indicators), the system can prepare appropriate control timing that ensures safety while minimizing unnecessary intervention.
3Device complexity
If the collision avoidance control start timing is fixed, then the system is simple to implement, but it cannot adapt to different driver states and situations
Solution Approach 1:
The electronic control unit performs self-assessment of the driver's collision self-avoidance probability by monitoring the driver's own operations and states. This self-service capability allows the system to automatically adapt control timing to different driver states without requiring complex external assessment devices or manual input, maintaining relative system simplicity while achieving high adaptability.
Solution Approach 2:
The system implements feedback by continuously monitoring driver behavior (steering wheel operations, pedal operations, eye tracking) and using this information to assess collision self-avoidance probability. This feedback loop enables the system to adapt the collision avoidance control start timing to match the current driver state, improving both safety and 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.