Driver Attention Warning Escalation During Autonomous Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle systems fail to effectively engage drivers during autonomous driving, particularly when their wakefulness levels are low or they rely heavily on automation, leading to reduced response to traffic changes.
Innovation Solution
A vehicle system that includes a vibration generation device, sound output device, and display projection on a head-up display to provide visual and auditory stimuli when a traffic change is detected, with adaptive warnings based on driver attention and steering wheel engagement, capable of terminating autonomous driving if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a light stimulus is presented to the driver using the head-up display during autonomous driving, then the driver's attention to the road ahead is improved, but the driver's response speed deteriorates when the driver's wakefulness level is reduced or the driver relies too much on autonomous driving
Solution Approach 1:
The warning device dynamically adjusts the type and intensity of warnings based on the driver's state. The ECU determines whether the driver is facing forward and holding the steering wheel, then selects appropriate warning levels (first warning with vibration or sound, second warning with both vibration and sound) to optimize both attention and response speed.
Solution Approach 2:
The system changes the parameters of the warning stimulus based on driver response. When the driver does not face forward or does not hold the steering wheel within a predetermined time, the system escalates from a first warning to a second warning with stronger stimulation to improve response speed.
2Ease of operation
If the driver relies on autonomous driving so much that the driver's interest in driving is reduced, then the ease of operation is improved, but the driver's wakefulness level deteriorates
Solution Approach 1:
The system continuously monitors the driver's state (whether facing forward, holding steering wheel) and provides feedback through the warning device. This feedback loop maintains driver wakefulness by detecting when the driver becomes too passive during autonomous driving and applying appropriate warnings to re-engage the driver.
3Loss of information
If a first warning is presented to the driver when the driver is not facing forward, then the driver's attention is improved, but the driver's response time increases when the driver does not hold the steering wheel
Solution Approach 1:
The system applies periodic warnings with increasing intensity. If the driver does not respond to the first warning within a predetermined time, a second warning with stronger stimulation is applied. This periodic escalation ensures the driver pays attention while minimizing the total response time through progressive intervention.
Data Source
AI summary
A vehicle system includes a warning device and at least one electronic control unit. The at least one electronic control unit is configured to present a light stimulus to a driver, and determine whether the driver is facing forward, determine whether the driver holds a steering wheel, and cause the warning device to perform a first warning when it is determined that the driver is not facing forward while the light stimulus is being presented. The first warning is either the vibration or the sound. The at least one electronic control unit is configured to perform a second warning when it is determined that the driver does not hold the steering wheel before a predetermined time elapses after the first warning is started. The second warning includes the vibration and the sound.