Driver Reaction Time Determination Using View Recognition
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Solution Overview
Problem
Current systems lack the capability to automatically determine a vehicle driver's condition, such as reaction time and field of vision, which are crucial for assessing fatigue or alcohol influence, leading to potential safety risks.
Innovation Solution
A method and device that display visual stimuli to the driver, use a view recognition device to observe the direction of view, and calculate reaction time by measuring the time span between stimulus display and recognition, with the option to activate safety functions if the driver fails to focus within a specified time, utilizing existing view control systems for enhanced reliability and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a view recognition device is used to observe the driver's direction of view, then the reliability of driver condition assessment is improved, but the device complexity increases
Solution Approach 1:
The patent applies multi-functionality by utilizing the existing view control system's camera and processing unit for both their original purpose (view control) and the new function of reaction time measurement. The control unit processes both view control data and reaction time measurement data, eliminating the need for separate dedicated hardware and reducing overall system complexity while maintaining assessment reliability
2Measurement precision
If visual stimuli are displayed randomly at predetermined locations, then the measurement precision of reaction time is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The system implements feedback by continuously monitoring the driver's direction of view through the camera and comparing it with the known positions of displayed visual stimuli. The control unit receives real-time position data from the camera and stimulus location information, automatically determining when the driver's view direction corresponds to a stimulus position, thereby precisely measuring reaction time without requiring complex manual detection procedures
3Productivity
If the reaction time determination is performed during calibration of the view recognition device, then the productivity is improved, but the measurement precision may be affected
Solution Approach 1:
The patent merges the calibration process with reaction time measurement by integrating both functions into a single operational sequence. During calibration, the system performs both view recognition calibration and reaction time determination simultaneously, eliminating the need for separate calibration and measurement phases, thereby improving productivity while maintaining measurement precision through the same rigorous detection methodology
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for reliable and automatic assessment of a driver's condition, enhancing traffic safety by preventing incapacitated driving and minimizing manipulation risks, while leveraging existing systems to reduce additional costs and complexity.
Implementation Method 1
WO 01/52722 A1 discloses a method for recognizing the direction of view of a user, in which a light beam is directed into the eye of the user and its reflection is acquired.
Data Source
AI summary
A method and a device for determining a reaction time of a vehicle driver of a vehicle includes a display device displaying at least one visual stimulus; and processing circuitry using a view recognition device to observe the direction of view of the vehicle driver, and determining the reaction time starting from the displaying of the visual stimulus, the reaction time corresponding to a specified time span if the direction of view of the vehicle driver is not recognized within the specified time span as running in the direction of the visual stimulus, or the reaction time corresponding to a time span in which the direction of view of the vehicle driver is recognized within the specified time span as running in the direction of the visual stimulus.