Adaptive Driver Handover Alerts in Autonomous Travel Control
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Solution Overview
Problem
Existing vehicle travel controllers fail to notify drivers of a change in autonomous driving levels without annoying attentive drivers, who may find such notifications disruptive.
Innovation Solution
A travel controller that includes a driving control unit, notifying unit, determining unit, and period modifying unit to adjust notification duration based on driver attention levels, using sensors to detect driver interaction and posture, ensuring timely and unobtrusive requests for driver engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the travel controller notifies the driver for a predetermined period when changing from autonomous driving level 3 to level 2, then the driver is requested to pay attention to driving, but the notification becomes annoying for drivers who are already paying sufficient attention
Solution Approach 1:
The notification period is made dynamic rather than fixed. The determining unit assesses the driver's attention level in real-time using sensor data (steering wheel contact, operation intensity, eye tracking), and the period modifying unit adjusts the notification duration accordingly. When high attention is detected, the notification period is shortened, preventing annoyance while maintaining safety requirements when attention is low.
Solution Approach 2:
The system changes the parameter of notification duration based on the driver's attention state. By monitoring physiological and operational parameters (steering contact time, operation scale, gaze direction), the system modifies the notification period parameter to optimize both driver engagement and comfort, resolving the contradiction between reliability and driver experience.
2Reliability
If the notification period is extended to ensure driver engagement, then driver safety is improved, but the driver experience deteriorates due to prolonged notifications
Solution Approach 1:
The system implements continuous feedback loops where sensors monitor driver state (attention level, operational engagement), this information is processed by the determining unit, and the period modifying unit adjusts the notification duration in real-time. This closed-loop feedback mechanism ensures the notification period is optimized for both safety and driver experience based on actual driver state.
Solution Approach 2:
The notification period transitions from a static predetermined value to a dynamic parameter that adapts to driver behavior. The system continuously evaluates driver engagement metrics and modifies the notification duration dynamically, allowing extended notifications only when necessary (low attention detected) and shortened notifications when the driver is already engaged, thus improving both safety and experience.
Data Source
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AI summary
The invention relates to a travel controller (8) comprising a driving control unit (831) that performs driving control of a vehicle (1) at an autonomous driving level that is a first autonomous driving level in which a driver of the vehicle is not obligated to watch or a second autonomous driving level in which the driver is obligated to watch, a notifying unit (832) that notifies, for a predetermined period, the driver of a request for driving the vehicle or taking a driving posture allowing for the driving, when the autonomous driving level of the driving control changes from the first autonomous driving level to the second autonomous driving level, a determining unit (834) that determines an attention level of the driver, based on an output of a sensor (2, 3a, 6) provided for the vehicle, the attention level being a level of attention to driving, and a period modifying unit (835) that modifies the predetermined period so as to be shorter when the determined attention level is high than when the determined attention level is low.