Dynamic Reference Range Adjustment for Driver Line-of-Sight Detection
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Solution Overview
Problem
Existing act-of-looking-aside determination devices are prone to erroneous determinations when a driver's line of sight is directed towards another vehicle cutting into their lane, especially at low vehicle speeds, leading to unnecessary alarms and discomfort during driving.
Innovation Solution
An act-of-looking-aside determination device that includes a line-of-sight direction detector, curve detector, surrounding information acquirer, other-vehicle detector, and determination reference range changer, which adjusts the determination reference range based on curve direction, relative vehicle position, and vehicle state information to prevent erroneous determinations by considering the behavior of adjacent vehicles and curvature of the road.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the determination reference range is fixed, then the determination accuracy is improved, but false alarms occur when another vehicle cuts into the lane
Solution Approach 1:
The determination reference range is changed from a fixed value to a dynamic value that adjusts based on vehicle speed and surrounding conditions. When another vehicle is detected in the adjacent lane, the reference range is expanded to accommodate the driver's line of sight toward that vehicle, preventing false alarms while maintaining determination accuracy under normal conditions
Solution Approach 2:
The system changes the parameters of the determination reference range based on detected conditions such as vehicle speed and presence of other vehicles. By dynamically adjusting these parameters, the system resolves the contradiction between maintaining fixed reference accuracy and adapting to changing traffic situations that may cause false alarms
2Reliability
If the determination reference range is expanded to accommodate other vehicles, then false alarms are reduced, but determination accuracy decreases
Solution Approach 1:
The system dynamically adjusts the determination reference range based on real-time conditions rather than using a permanently expanded range. The range expands only when necessary (when other vehicles are detected) and returns to its original state when conditions normalize, thus maintaining high determination accuracy while reducing false alarms only when needed
3Measurement precision
If the system monitors line of sight continuously, then determination accuracy is maintained, but system complexity increases
Solution Approach 1:
The system performs preliminary detection of surrounding vehicles and road conditions before line-of-sight determination is needed. By pre-acquiring information about other vehicles and adjusting the determination reference range in advance, the system simplifies the subsequent line-of-sight analysis while maintaining high determination accuracy
Data Source
AI summary
The present invention provides an act-of-looking-aside determination device in which a determination reference range changer changes a determination reference range in an act-of-looking-aside determiner by a predetermined angle in a curve direction based on information on a curve direction detected by a curve detector, while when a line-of-sight direction of a driver detected by a line-of-sight direction detector follows a relative direction of another vehicle acquired by a relative direction acquirer as viewed from an own vehicle with respect to the other vehicle detected by an other-vehicle detector, it is not determined that the driver is looking aside even when the line-of-sight direction is out of the determination reference range not corresponding to an act of looking aside. Thus, an erroneous determination of an act of looking aside can be prevented.