Dynamic Driver Takeover Period for Automated Driving Safety
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Solution Overview
Problem
Current driver assistance systems lack effective mechanisms for safely transitioning from automated driving to manual driving, as they do not adequately account for driver activity and environmental conditions, potentially leading to unsafe handovers.
Innovation Solution
A method that determines a driver-specific takeover period based on the driver's activity, using communication with a mobile device or integrated vehicle systems, and compares it to a continuously updated minimum operating period to ensure safe transitions, with warning signals and system adjustments for timely handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the takeover period is extended to give the driver more time to take over control, then driving safety is improved, but the response time to potential hazards is reduced
Solution Approach 1:
The takeover period is made dynamic rather than fixed. The system continuously monitors driver activity through device communication and adjusts the takeover period in real-time based on the driver's current state. When the driver is highly active or distracted, the takeover period is extended; when the driver is calm and attentive, it is shortened. This dynamic adjustment resolves the contradiction by optimizing both safety and response time according to actual driving conditions.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring driver activity through communication with mobile devices and other user equipment. This feedback loop allows the system to assess the driver's state (e.g., through usage patterns, response times, or explicit inputs) and adjust the takeover period accordingly. The feedback ensures that the takeover period is neither too long nor too short, but optimally adapted to the driver's current situation, thereby balancing safety and hazard response time.
2Reliability
If the takeover period is determined individually for each driver based on their activity, then driving safety is improved, but the system complexity increases
Solution Approach 1:
The system determines the takeover period autonomously by monitoring driver activity through communication with devices already present in the vehicle (mobile phones, tablets, infotainment systems). The driver's own device usage patterns serve as the basis for determining their individual takeover period, eliminating the need for manual calibration or complex psychological assessments. This self-service approach achieves individualization without proportionally increasing system complexity.
Solution Approach 2:
The system leverages existing multi-functional devices (mobile phones, infotainment systems) that serve both as communication tools and as sensors for monitoring driver activity. By utilizing these devices' existing capabilities for dual purposes, the system avoids adding dedicated complex monitoring hardware, thereby reducing overall system complexity while still achieving individualized takeover period determination.
3Measurement precision
If the system continuously monitors driver activity to determine the takeover period, then the accuracy of handover timing is improved, but the energy consumption increases
Solution Approach 1:
The system monitors driver activity partially rather than continuously at maximum intensity. It selectively monitors specific parameters (e.g., device usage states, communication patterns) rather than all possible driver parameters. This partial monitoring approach achieves sufficient accuracy for determining handover timing while significantly reducing energy consumption compared to comprehensive continuous monitoring of all driver physiological and behavioral parameters.
Data Source
Figure 1
AI summary
The invention relates to a method for the at least partially automated driving in a vehicle. The termination of the automated driving function and the at least partial transferring of the vehicle controls to the driver is initially carried out after the elapse of a takeover period which is determined by the driver from the actuation of a device communicating with the vehicle. The device can be a mobile device.