Vehicular Driver State Detection Using Eye, Gaze, and Operation Inputs
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Solution Overview
Problem
Existing vehicular devices have insufficient determination accuracy for detecting when a driver's state deviates from a safe driving state, leading to unnecessary notifications or missed alerts, as they primarily rely on eye opening degree and line-of-sight movement without considering the driver's operation state for driving instruments.
Innovation Solution
A vehicular device that includes an eye opening degree determiner, line-of-sight movement determiner, operation state determiner, and notification controllers to assess the driver's state based on eye opening degree, line-of-sight movement, and operation state for instruments like the accelerator, brake, and steering, with different notification thresholds for inside and outside notifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the vehicular device uses only eye opening degree and line-of-sight movement for determination, then the device complexity is low, but the determination accuracy is insufficient
Solution Approach 1:
The patent combines multiple determination methods (eye opening degree determination, line-of-sight movement determination, and operation state determination) into a single integrated determination system. The determination unit synthesizes results from these different methods to comprehensively assess driver state, improving accuracy while managing complexity through systematic integration
2Measurement precision
If the vehicular device uses multiple determination methods, then the determination accuracy improves, but the device complexity increases
Solution Approach 1:
The determination system is divided into separate functional modules: an eye opening degree determiner, a line-of-sight movement determiner, and an operation state determiner. Each module independently processes specific aspects of driver state, and their results are combined by the determination unit. This segmentation allows for improved accuracy through multiple determination methods while managing complexity through modular design
3Reliability
If the vehicular device performs frequent notifications, then the driver safety monitoring is enhanced, but unnecessary notifications increase
Solution Approach 1:
The notification controller implements a feedback mechanism that continuously monitors the driver state determination results and adjusts notification behavior accordingly. By using the comprehensive determination results from multiple methods as feedback, the system can distinguish between genuine safety concerns requiring notification and transient states that do not warrant alerting, thereby reducing unnecessary notifications while maintaining reliable safety monitoring
Data Source
AI summary
A vehicular device includes: an eye opening degree determiner that determines a driver eye opening degree; a line-of-sight movement determiner that determines frequency of a driver line-of-sight movement; an operation determiner that determines a driver operation state for a driving operation instrument; a deviation determiner that determines a possibility that a driving state of a subject vehicle driver deviates from a safe driving state; a vehicle inside notification controller that performs a notification operation for a vehicle inside; and a vehicle outside notification controller that performs a notification operation for a vehicle outside.