In-Vehicle Eye Tracking for Autonomous Driver Inebriation Tests
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Solution Overview
Problem
Existing methods for preventing intoxicated driving, such as breath analyzers and horizontal gaze nystagmus tests, are limited by logistical constraints and require external apparatus or officer involvement, necessitating a more practical and autonomous solution.
Innovation Solution
A vehicle-based system that uses a processor to coach the driver to perform a horizontal eye gaze nystagmus test, determining inebriation through eye movement analysis without additional equipment and external intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a breath analyzer is used to test driver inebriation, then measurement precision is improved, but device complexity and ease of operation worsen due to requiring separate apparatus and external enforcement officers
Solution Approach 1:
The patent combines the inebriation testing functionality with the vehicle's existing camera system. The camera, already present for other purposes, is repurposed to detect eye movements and determine driver inebriation, eliminating the need for separate breath analyzer apparatus and integrating multiple functions into a single system.
Solution Approach 2:
The system enables automated inebriation detection without requiring external enforcement officers. The camera-based system automatically captures eye movement data, processes it through algorithms, and determines inebriation status autonomously, making the system self-sufficient and removing dependency on external personnel.
2Reliability
If a breath analyzer is deployed for inebriation testing, then reliability is improved, but ease of operation worsens due to logistical constraints and officer bandwidth limitations
Solution Approach 1:
The system performs automated inebriation detection using the vehicle's existing camera infrastructure. The camera continuously monitors driver eye movements, and the integrated processing system automatically analyzes the data to determine inebriation status, eliminating the need for manual intervention by enforcement officers and enabling continuous operation without logistical constraints.
Solution Approach 2:
The patent replaces the manual mechanical process of breath testing with an automated optical system. Instead of requiring officers to physically administer breath tests, the camera-based optical system continuously monitors eye movements and automatically determines inebriation, substituting manual operations with automated technological processes.
3Measurement precision
If horizontal gaze nystagmus test is performed by police officers, then measurement precision is maintained, but productivity worsens due to officer bandwidth constraints
Solution Approach 1:
The system automates the entire eye movement testing process that previously required officer involvement. The camera system continuously captures and analyzes driver eye movements without interruption, enabling multiple drivers to be tested simultaneously and eliminating the time constraints imposed by manual officer administration of the horizontal gaze nystagmus test.
Solution Approach 2:
The camera-based system enables continuous monitoring of driver eye movements without interruption. Unlike manual testing that requires officers to administer tests sequentially, the automated system can continuously capture and analyze eye movement data, maintaining uninterrupted monitoring and significantly increasing testing throughput.
Data Source
AI summary
A method to prevent intoxicated operation is described. The method includes providing instructions to a vehicle user to position a vehicle user body portion posture in a predefined alignment. The method further includes obtaining the vehicle user body portion posture from a first vehicle detector, and determining whether the vehicle user body portion posture is in the predefined alignment. The method includes activating a plurality of vehicle visual indicators to illuminate in a predefined manner when the vehicle user body portion posture is in the predefined alignment. The method further includes providing instructions to the vehicle user to move vehicle user eyes to track the plurality of vehicle visual indicators, and obtaining a vehicle user eye movement from a second vehicle detector. The method further includes determining whether the vehicle user eye movement meets a predetermined condition, and actuating a control action accordingly.