Autonomous Vehicle Pedestrian Notification Around Stopping Distance
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Solution Overview
Problem
Existing autonomous vehicle notification systems may confuse multiple pedestrians about the vehicle's behavior, particularly when multiple pedestrians are detected along its trajectory, leading to incorrect perceptions of the vehicle's intention to stop or pass by.
Innovation Solution
A notification device with a recognition unit, determination unit, calculation unit, and notification controller that calculates a vehicle stoppage distance and controls notifications based on the positions and distances of soon-to-cross pedestrians, ensuring accurate communication of the vehicle's behavior to avoid confusion among pedestrians.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle performs notification about deceleration when starting deceleration, then pedestrians can be notified of the vehicle's behavior, but multiple pedestrians may be confused about where the vehicle will stop
Solution Approach 1:
The notification is segmented based on spatial relationships with different pedestrians. The notification controller divides the notification strategy into different cases: when the first pedestrian is within stoppage distance versus when the second pedestrian is within stoppage distance, providing different notification information to different pedestrian groups to avoid confusion
Solution Approach 2:
Different notification information is provided to different pedestrians based on their local positions relative to the vehicle. The first pedestrian receives different notification than the second pedestrian, with the notification content tailored to each pedestrian's position and the vehicle's intended stopping point
2Reliability
If the vehicle stops at the position of the second pedestrian while passing the first pedestrian, then the vehicle can safely stop before the second pedestrian, but the first pedestrian may erroneously recognize that the vehicle will stop in front of them
Solution Approach 1:
The notification controller prepares and sends different notification information to different pedestrians in advance based on predicted vehicle stopping positions. Before the vehicle actually stops, the appropriate pedestrian receives notification about the intended stopping behavior, allowing them to understand the vehicle's intention before the action occurs
Solution Approach 2:
The system continuously monitors the positions of multiple pedestrians and adjusts the notification content based on real-time spatial relationships. The notification controller receives feedback about pedestrian positions and dynamically determines which notification information to send to which pedestrian to maintain accurate intention communication
Data Source
AI summary
A notification device includes a calculation unit calculating, based on a speed of a vehicle, a vehicle stoppage distance by which the vehicle travels until the vehicle enters a stopped state while performing autonomous driving, a notification unit performing notification about information with respect to an outside of the vehicle, and a notification controller causing the notification unit not to perform notification about information indicating that the vehicle is in the middle of deceleration until the vehicle passes by a first soon-to-cross pedestrian and to cause the notification unit to perform notification about the information after the vehicle passes by the first soon-to-cross pedestrian when a distance between the vehicle and the first soon-to-cross pedestrian is smaller than the vehicle stoppage distance and a distance between the vehicle and a second soon-to-cross pedestrian is equal to or greater than the vehicle stoppage distance.