Vehicular Information Device for Autonomous Drive Mode Transition
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Solution Overview
Problem
During transitions from autonomous drive modes with high automation levels (e.g., level-3) to those requiring greater driver involvement (e.g., level-2), drivers may experience mode confusion, leading to unexpected events such as lane deviation due to misunderstanding the change in drive control states.
Innovation Solution
A method and device that increase the frequency and intensity of attention-arousing information to the driver when switching from a fully automated drive state to a state requiring greater driver involvement, using a combination of sensory output devices and adjusted judgment criteria until a prescribed condition is met, ensuring the driver recognizes the change in drive mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the system switches from level-3 autonomous drive to level-2 autonomous drive, then the driver's involvement in drive control increases, but the driver may experience mode confusion and fail to recognize the transition
Solution Approach 1:
The system performs preliminary actions by displaying mode transition information before the actual transition occurs. The display unit shows notices about the upcoming switch from level-3 to level-2 autonomous drive, allowing the driver to prepare mentally and recognize the change in control responsibilities before it happens.
Solution Approach 2:
The system implements feedback by continuously displaying information about the current autonomous drive mode and any upcoming transitions. The display unit provides real-time feedback to the driver about the system's state, ensuring the driver remains aware of their level of involvement and any changes thereto.
2Ease of operation
If the system uses standard information display during mode transition, then the device complexity remains low, but the driver may not sufficiently recognize the change in drive state
Solution Approach 1:
The information presentation is segmented into distinct components: current mode display, transition notice display, and condition satisfaction display. This segmentation allows the system to provide comprehensive information without overwhelming the driver, maintaining ease of operation while improving recognition of mode changes.
Solution Approach 2:
The system adds a temporal dimension to information presentation by displaying not only the current mode but also upcoming transitions and their conditions. This multi-dimensional approach (current state + future state + conditions) enhances driver awareness without significantly increasing device complexity.
Data Source
AI summary
Until a lapse of a prescribed time from switching to a manual drive mode, a special judgment criterion for judging whether to generate an attention-arousing event is employed so that an attention-arousing event is generated more frequently than in an ordinary state and information is presented to a driver in a different expression form than in the ordinary situation. Since after occurrence of a handover the frequency of arousing attention of the driver is increased and attention of the driver is aroused in a different form, the driver realizes the switching to the manual drive mode soon and hence mode confusion can be avoided. Arousing attention of the driver is started earlier than in the ordinary situation by changing the judgment criterion for judging whether to generate an attention-arousing event.