Driver-Aware Collision Assistance Timing for Distracted Drivers
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Solution Overview
Problem
Existing driving assistance systems fail to appropriately adjust warning sound output timing when a driver is cognitively distracted and unaware of an impending collision, despite the object being in their line of sight.
Innovation Solution
A driving assistance system that utilizes external sensors to detect environmental conditions and motion sensors to determine if a collision risk exists, and adjusts assistance control based on whether the driver has performed preparatory actions within a given time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If assistance control is executed based on collision risk detection alone, then collision avoidance capability is improved, but false warnings occur when driver is cognitively distracted and unaware of the risk
Solution Approach 1:
The system performs preliminary detection of driver cognitive state through motion sensors before executing assistance control. By detecting whether the driver has performed preparatory actions (such as foot movement toward brake pedal) within a predetermined time period, the system determines driver awareness level and adjusts warning execution accordingly, preventing false warnings to distracted drivers while maintaining effective warnings to attentive drivers
Solution Approach 2:
The system introduces feedback by continuously monitoring driver motion and cognitive state, using this information to dynamically adjust assistance control execution. The motion sensor provides real-time feedback on driver preparedness, allowing the system to adapt warning timing and execution based on actual driver awareness, thereby reducing false warnings while maintaining collision avoidance effectiveness
2Reliability
If warning sound is output earlier to ensure driver awareness, then collision avoidance is improved, but driver distraction and annoyance increase
Solution Approach 1:
The system dynamically adjusts warning execution timing based on real-time detection of driver cognitive state and preparatory actions. Rather than using fixed early warning timing, the system adapts warning execution to match actual driver awareness levels, outputting warnings earlier only when the driver is attentive and later or not at all when the driver is distracted, thereby optimizing both collision avoidance and driver comfort
Data Source
AI summary
A driving assistance device is provided that is configured to: determine whether or not a current situation is a risk situation where there is a possibility of collision with an object, based on an output signal of an external sensor detecting an environment around the vehicle; execute assistance control for the vehicle to avoid the collision with the object, based on determining that the current situation is the risk situation; determine whether or not a preparatory action for avoiding the collision has been performed by a driver, based on an output signal of a motion sensor that detects the driver's motion; and change execution timing of the assistance control depending on whether or not the preparatory action has been performed within a given determination time period.