Driver Sightline Warning Control for Risk-Aware Alert Timing
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Solution Overview
Problem
Existing warning systems fail to issue appropriate warnings for drivers based on their sightline direction and the presence of risky objects, leading to potential safety issues.
Innovation Solution
A notification control system that detects a driver's sightline and outputs warnings when certain conditions are met, including the sightline being out of a predetermined range and the presence of a risky object in a reference area, with timing and frequency of warnings adjusted based on specific conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a warning is issued when the driver's sightline is out of range for a longer duration, then false warnings are reduced, but the warning timing is delayed when risky objects are present
Solution Approach 1:
The patent applies dynamics by making the warning issuance threshold adaptive rather than fixed. The required sightline deviation duration changes dynamically based on whether a risky object is detected: a shorter duration (first threshold) when risky objects are present, and a longer duration (second threshold) when no risky objects are detected. This dynamic adjustment resolves the contradiction between reducing false warnings and ensuring timely warnings.
Solution Approach 2:
The patent changes the parameter of warning trigger duration based on the presence of risky objects. When risky objects are detected in the reference area, the system lowers the duration threshold from the second threshold to the first threshold, enabling faster warning issuance. This parameter change allows the system to balance reliability and timing responsiveness.
2Reliability
If warnings are issued frequently when sightline conditions are met, then driver awareness is enhanced, but driver distraction and annoyance increase
Solution Approach 1:
The patent implements periodic action through the third threshold mechanism. After issuing a warning, the system requires the sightline condition to persist for an additional duration (third threshold) before issuing another warning. This periodic restraint prevents continuous warning issuance, reducing driver distraction and annoyance while maintaining driver awareness through timely periodic alerts.
3Measurement precision
If the sightline range threshold is set strictly, then warning precision is improved, but more false warnings are generated
Solution Approach 1:
The patent applies dynamics by adjusting the effective threshold based on contextual information (risky object presence). The sightline deviation duration threshold is not fixed but dynamically adjusted: a shorter first threshold when risky objects are present and a longer second threshold when they are absent. This dynamic approach maintains measurement precision while adapting reliability to contextual risk levels.
Data Source
AI summary
A notification control device performs: detecting a sightline of a driver; causing an information output device to output a first warning when a first condition is satisfied; and causing the information output device to output a second warning when a second condition is satisfied. The first condition is a condition that the driver's sight line is out of a predetermined range in which the driver is considered to see a view in front of the mobile object and a state in which the sightline is out of the range is maintained for a first time. The second condition is a condition that the driver's sightline is out of the range, a risky object to be noticed is present in a reference area, and the state in which the sightline is out of the range is maintained for a second time shorter than the first time.