Driver Distraction Alert System Using Gaze Duration and Hazard Speed

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Solution Overview

Problem

Existing driver distraction mitigation systems in vehicles often issue alerts that can be distracting to attentive drivers, and fail to differentiate between normal and excessive off-road glances, potentially interfering with response times during critical situations.

Innovation Solution

A method that issues driver alerts based on both the proportion of off-road gaze time and its duration, and only if the driver's gaze has been off-road for less than a calibrated time, and also considers the closing speed of in-path objects detected by forward-looking sensors to avoid alerting drivers during impending hazards.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If driver alerts are issued based on proportion of off-road gaze time, then driver distraction is mitigated, but response time of attentive drivers is adversely affected

Engineering Contradiction:
Improvedriver distraction mitigationVSAvoidresponse time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The system applies different alert issuance rules to different types of off-road glances. Normal glances (brief, intentional checks) are excluded from triggering alerts by applying a duration threshold, while excessive distraction patterns (prolonged off-road gaze) are detected and addressed. This local differentiation resolves the contradiction by making the alert system selective rather than uniform.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The alert issuance criteria dynamically adjust based on multiple factors including the proportion of off-road gaze time, the duration of individual glances, and the presence of hazards. The system transitions from a static threshold-based approach to a dynamic multi-parameter evaluation that adapts to driving context, thereby mitigating distraction without penalizing attentive drivers performing normal scanning behaviors.

Inventive Principle:
Principle #15Dynamics

2Reliability

If driver alerts are issued for any off-road gaze, then distraction is addressed, but normal and desirable off-road glances are penalized

Engineering Contradiction:
Improvedistraction detectionVSAvoiddriver behavior
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system distinguishes between different qualities of off-road glances by analyzing their duration characteristics. Brief glances typical of normal driving scanning (e.g., checking side mirrors or blind spots) are excluded from alert triggering, while prolonged glances indicating excessive distraction are targeted. This resolves the contradiction by applying alert logic selectively to harmful behaviors while preserving normal driving operations.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The system changes the parameter of glance duration from an irrelevant factor to a critical decision parameter. By establishing a duration threshold, the system transforms the alert issuance criterion from a simple binary state (on-road/off-road) to a multi-dimensional evaluation that considers both location and temporal characteristics, thereby distinguishing normal from excessive glances.

Inventive Principle:
Principle #35Parameter changes

3Reliability

If alerts are issued during critical situations, then driver safety is improved, but attentive drivers experience unnecessary distraction

Engineering Contradiction:
Improvedriver safetyVSAvoiddriver distraction
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary detection and classification of driving situations before issuing alerts. By continuously monitoring off-road gaze patterns and comparing them against established criteria (proportion threshold, duration threshold), the system pre-identifies excessive distraction scenarios that warrant intervention while filtering out normal scanning behaviors, thereby avoiding unnecessary alerts during critical situations.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system implements feedback loops that continuously evaluate multiple parameters (off-road proportion, glance duration, hazard presence) to dynamically adjust alert issuance decisions. This feedback mechanism ensures that alerts are issued only when the pattern of off-road glances indicates excessive distraction rather than normal attentive driving, resolving the contradiction between safety intervention and avoidance of unnecessary distraction.

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS7835834B2Method of mitigating driver distraction
Publication Date: 2010.11.16 APTIV TECHNOLOGIES AG
  • US7835834B2 patent drawing
  • US7835834B2 patent drawing
  • US7835834B2 patent drawing

AI summary

A driver alert for mitigating driver distraction is issued based on a proportion of off-road gaze time and the duration of a current off-road gaze. The driver alert is ordinarily issued when the proportion of off-road gaze exceeds a threshold, but is not issued if the driver's gaze has been off-road for at least a reference time. In vehicles equipped with forward-looking object detection, the driver alert is also not issued if the closing speed of an in-path object exceeds a calibrated closing rate.