Driver Information Determination for Curved Roads
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Solution Overview
Problem
Existing driver information determination apparatuses inaccurately determine the reference face direction when a curved or inclined road is present, as they fail to account for road geometry and driver visibility conditions.
Innovation Solution
A driver information determination apparatus that includes a road shape acquisition unit, condition determination unit, face direction acquisition unit, and reference face direction determination unit, which assesses the road shape ahead and adjusts the determination of the reference face direction based on road curvature and incline, using the driver's face direction only when the road is straight and level, and not when it is curved or inclined, and also considers the presence of a preceding vehicle within a short-distance range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the reference face direction is determined based on the driver's face direction when a curved or inclined road is present, then the determination can be made continuously, but the accuracy of the reference face direction deteriorates because the driver may not see the front
Solution Approach 1:
The system dynamically adjusts the determination strategy based on real-time road conditions. When curved or inclined roads are detected ahead, the system switches from using current face direction to using previously determined reference face direction, ensuring accuracy adapts to changing driving conditions
Solution Approach 2:
The system uses feedback from road shape acquisition to control the determination process. By continuously monitoring road curvature and incline ahead of the vehicle, the system determines whether conditions are suitable for accurate face direction measurement, and adjusts accordingly
2Quantity of substance
If the driver's face direction is used to determine reference face direction on curved or inclined roads, then more data points are available for determination, but the reliability deteriorates as the driver is likely looking at the end of the curve or incline rather than the front
Solution Approach 1:
The system performs preliminary assessment of road conditions before determining whether to use face direction data. By acquiring road shape information in advance and evaluating curvature and incline thresholds, the system prevents unreliable data from being used in the determination process
Solution Approach 2:
The system changes the operational parameters of the determination process based on road conditions. When road curvature or incline exceeds predetermined thresholds, the system changes from accepting face direction data to rejecting it, maintaining reliability through parameter-based control
Data Source
AI summary
A driver information determination apparatus includes a road shape acquisition unit configured to acquire a front section shape ahead of a vehicle; a condition determination unit configured to determine whether the front section shape is a determination target shape; a face direction acquisition unit configured to acquire a face direction of a driver; and a reference face direction determination unit configured to determine a reference face direction based on the face direction of the driver. When it is determined that the front section shape is the determination target shape, the reference face direction determination unit determines the reference face direction based on the face direction of the driver. The determination target shape is a shape of a road having a road curvature less than or equal to a preset upper curvature limit or a shape of the road having a road incline within a preset level range.