Inattention Determining Device Curve Entry Threshold Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inattention determining devices incorrectly determine a driver's state as inattentive when the angle threshold value is changed too late during curve entry, leading to erroneous assessments of the driver's visual checking of the turning direction.
Innovation Solution
An inattention determining device that captures a driver's face image and detects their sight line direction, adjusts the predetermined range for inattention determination based on vehicle behavior and curve detection results before the vehicle enters a curve, and discontinues inattention determination when the wheel steering angle exceeds a certain value, providing visual guidance through a display on the windshield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the angle threshold value is changed after detecting the yaw rate or lateral acceleration when the driving state is actually changed, then the device adapts to the current driving state, but the determination of inattention is incorrectly performed because the change occurs too late
Solution Approach 1:
The system performs preliminary action by changing the angle threshold value in advance based on curve detection results before the vehicle actually enters the curve. The curve detector identifies upcoming curves ahead of time, and the range changing unit adjusts the threshold accordingly before the driver needs to check the turning direction, preventing erroneous inattention determinations
Solution Approach 2:
The system uses feedback from the curve detector about upcoming curves to dynamically adjust the angle threshold value. The curve detection result feeds back to the range changing unit, which modifies the threshold before the vehicle enters the curve, creating a closed-loop control system that adapts to road conditions
2Adaptability or versatility
If the angle threshold value is changed to accommodate curve driving, then the device becomes more adaptable to different driving conditions, but it may erroneously determine that the driver is inattentive when visually checking the turning direction before entering the curve
Solution Approach 1:
The system changes the angle threshold value in advance based on detected curves before the vehicle enters them. This preliminary adjustment ensures the threshold is already appropriate when the driver visually checks the turning direction, preventing false inattention determinations while maintaining adaptability
Solution Approach 2:
The angle threshold value is made dynamic rather than fixed. The range changing unit continuously adjusts the threshold based on real-time curve detection results and vehicle state, allowing the system to adapt smoothly to changing driving conditions without causing determination errors
Data Source
AI summary
An inattention determining device includes range changing unit and inattention determining unit. When a curve detection result is output from curve detector, the range changing unit changes a first predetermined range to a second predetermined range by the predetermined amount in the curve direction before a turning direction of an acquisition result is changed in the curve direction of the curve detection result. The inattention determining unit determines whether or not a driver is in an inattention state on the basis of the second predetermined range.