Driver Abnormality Detection Using Dynamic Dual-Function Criteria
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Solution Overview
Problem
Existing automated driving systems face challenges in quickly and accurately determining driver abnormality, particularly in systems where the driver is primarily responsible for driving, leading to potential safety risks and delayed recognition of driver illness or dysfunction.
Innovation Solution
A driver abnormality determination apparatus that combines the results from driving operation sensors and driver state sensors to detect the exertion levels of involuntary and driving functions, allowing for early and accurate determination of driver abnormality by relaxing determination criteria based on detected function levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the determination criterion for driver abnormality is set to ensure high accuracy, then the accuracy of abnormality determination is improved, but the time required for determination increases
Solution Approach 1:
The determination criterion is made dynamic rather than fixed. The control section adjusts the determination criterion based on the detected exertion level of the involuntary function. When the exertion level is high (indicating potential abnormality), the criterion is relaxed to enable faster determination. When the exertion level is normal, the criterion is maintained at a higher threshold to ensure accuracy. This dynamic adjustment resolves the contradiction between speed and accuracy.
Solution Approach 2:
The system changes the parameter of the determination criterion based on the detected state of the driver's involuntary function. By monitoring the exertion level and adjusting the threshold accordingly, the system adapts the determination parameters to current conditions, enabling both rapid detection when needed and accurate determination when the driver is normal.
2Productivity
If the determination criterion is relaxed to reduce determination time, then the time required for determination is reduced, but the accuracy of abnormality determination deteriorates
Solution Approach 1:
The determination criterion dynamically adapts based on the detected exertion level. When high exertion is detected (suggesting abnormality), the criterion is relaxed to prioritize speed. When normal exertion is detected, the criterion maintains higher thresholds to preserve accuracy. This dynamic behavior allows the system to optimize for speed only when necessary.
Solution Approach 2:
The system performs preliminary detection of the involuntary function's exertion level before conducting the full abnormality determination. This preliminary assessment allows the system to pre-adjust the determination criterion to an appropriate stringency level, avoiding both unnecessary delays and false positives.
3Measurement precision
If multiple detection methods are combined to improve accuracy, then the accuracy of determination is improved, but the device complexity increases
Solution Approach 1:
The determination system is segmented into two independent but complementary parts: detection of involuntary function exertion level and detection of driving operation exertion level. Each part can be implemented with relatively simple sensors and processing, but together they provide comprehensive and accurate abnormality determination through their combined results.
Data Source
AI summary
A driver abnormality determination apparatus includes circuitry configured to detect a driver state of a driver of a vehicle, detect a driving operation of the driver, detect an exertion level of an involuntary function of the driver based on the driver state, detect an exertion level of a driving function of the driver based on the driving operation; and determine driver abnormality based on the execution level of the involuntary function and the execution level of the driving function. On condition that a function level of one of the execution level of the involuntary function and the execution level of the driving function is equal to or lower than a specified determination criterion, the circuitry is configured to relax a determination criterion for the other function level.