Driver Alert HMI Selection Based on Fatigue and Contact Risk
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Solution Overview
Problem
Existing preventive safety technologies fail to reliably inform drivers of potential contact risks with surrounding objects based on their fatigue levels and attention states, which is crucial for enhancing traffic safety in sustainable transportation systems.
Innovation Solution
An attention attracting system utilizing tactile, auditory, and visual HMI devices to provide stimuli tailored to a driver's fatigue level and attention state, including electric seat belts, speakers, and meter displays, to alert drivers of potential contact risks through tactile, auditory, and visual cues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple HMI devices (tactile, auditory, visual) are used to alert drivers of contact risks, then driver awareness and reliability of risk notification are improved, but device complexity increases
Solution Approach 1:
The notification system is segmented into three independent HMI devices: tactile HMI device (seat belt tensioner), auditory HMI device (speaker), and visual HMI device (display). Each device handles specific types of notifications, allowing the system to improve reliability through redundancy while managing complexity by dividing functions across separate components rather than consolidating them into a single complex device.
Solution Approach 2:
The notification system is designed with multi-functional HMI devices that can operate independently or in combination. The tactile HMI device can provide both warning and corrective functions through seat belt tensioning. The auditory HMI device can provide various types of audio warnings. The visual HMI device can display different types of information. This universality allows the system to achieve high reliability through multiple notification channels while avoiding the need for specialized dedicated devices for each function.
2Reliability
If HMI device selection is based on driver fatigue level and attention state, then notification effectiveness is improved, but system complexity increases
Solution Approach 1:
The system performs preliminary assessment of driver fatigue level and attention state before issuing risk notifications. By evaluating driver condition in advance and selecting the appropriate HMI device based on this assessment, the system ensures notification effectiveness is optimized for the current driver state. This preliminary action prevents wasted notifications that would be ineffective and maintains reliability without requiring complex real-time adjustments during critical moments.
Solution Approach 2:
The notification system dynamically adapts its behavior based on real-time driver fatigue level and attention state assessments. The selection of which HMI device to use (tactile, auditory, or visual) changes dynamically according to driver condition. This dynamic adaptation ensures that notifications are delivered through the most effective channel for each specific situation, improving reliability while managing complexity through adaptive rather than static device selection logic.
Data Source
AI summary
An attention attracting system includes HMI devices that are mounted on a subject vehicle; and an attention attracting device that transmits, to a driver, a possibility of contact between the subject vehicle and an object through the HMI devices. The attention attracting device includes a processor that identifies a risk position at which the contact occurs and a risk level of the contact, estimates a degree of fatigue of the driver, and transmits the risk position and the risk level to the driver. The processor selects an HMI device to be used in accordance with the degree of fatigue of the driver, provides a tactile stimulus or an auditory stimulus to the driver through a tactile HMI device or an auditory HMI device at a remarkableness level corresponding to height of the risk level, and transmits visual information to the driver through a visual HMI device.