Vehicle Control Device Dynamic Notification Timing
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Solution Overview
Problem
Existing vehicle control devices fail to appropriately urge drivers to switch from autonomous travel to manual travel, as notification timings are not tailored to the driver's wakefulness or adaptation state, leading to inappropriate switching situations.
Innovation Solution
A vehicle control device equipped with a driver state detection unit, calculation unit, and notification unit that calculates a manual driving adaptation degree and performs automatic travel end notifications earlier as the adaptation degree decreases, along with a vehicle travel control unit that adjusts travel state or speed based on the driver's acceptance state, ensuring timely and appropriate switching to manual travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the automatic travel end notification is performed at the same timing regardless of driver state, then the notification system is simple, but the driver may not be appropriately urged to switch to manual travel when in a low wakefulness state
Solution Approach 1:
The notification timing is made dynamic by adjusting it based on the driver's wakefulness degree. The system calculates the wakefulness degree continuously and adapts the notification timing accordingly, making the notification occur earlier when wakefulness is low and later when wakefulness is high, thereby ensuring appropriate driver response while maintaining system simplicity
Solution Approach 2:
The system changes the notification timing parameter based on the wakefulness degree parameter. By calculating the wakefulness degree and using it to determine the optimal notification timing, the system ensures that drivers in low wakefulness states receive earlier notifications, improving the reliability of travel mode switching without significantly increasing device complexity
2Reliability
If the notification timing is advanced for drivers with low manual driving adaptation degree, then the driver has more time to prepare for manual travel, but the vehicle takes longer to reach the destination
Solution Approach 1:
The notification timing is dynamically adjusted based on the driver's manual driving adaptation degree. The system calculates the adaptation degree and adapts the notification timing to occur earlier when adaptation is low, giving the driver adequate preparation time while minimizing the impact on overall travel time through intelligent timing optimization
Solution Approach 2:
The system changes the notification timing parameter based on the manual driving adaptation degree parameter. By using the calculated adaptation degree to determine optimal notification timing, the system balances driver readiness requirements with time efficiency, ensuring drivers have sufficient preparation time without excessive delays
3Reliability
If the vehicle speed is decreased to extend arrival time at the ending point, then the driver has more time to switch to manual travel, but the travel efficiency is reduced
Solution Approach 1:
The vehicle speed is dynamically adjusted based on the driver's manual driving acceptance state. The system monitors driving operations and adapts the vehicle speed in real-time, decreasing speed only when the driver is not ready for manual travel and restoring normal speed when the driver is prepared, thereby maintaining travel efficiency while ensuring driver safety
Solution Approach 2:
The system changes the vehicle speed parameter based on the driver's manual driving acceptance parameter. By using driving operation detection to determine the appropriate speed adjustment, the system extends arrival time only when necessary for driver readiness, minimizing the impact on overall travel efficiency through conditional parameter modification
Data Source
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AI summary
In a vehicle control device that is configured to be capable of switching from an automatic travel of the vehicle to manual travel by a driver, a manual driving adaptation degree of a driver during an automatic travel is calculated based on a driver state (S16), a notification timing is set such that the notification timing is earlier as the manual driving adaptation degree becomes lower (S18), and the automatic travel end notification is given to the driver at the set notification timing (S20).