Driver Workload Control System for Vehicle Information Management
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Solution Overview
Problem
Current methods for monitoring driver workload do not effectively assess the impact of additional tasks on driver performance, as they rely solely on physiological parameters and do not account for varying vehicle operating conditions, leading to potential overload and impaired performance.
Innovation Solution
A system and method that monitor vehicle operating parameters to estimate driver workload using thresholds to categorize workload ratings (LOW, MEDIUM, HIGH) and control the output of information to the driver, adjusting the timing and format of messages based on real-time workload assessments to prevent overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If information output to the driver is increased to provide comprehensive vehicle system feedback, then driver awareness of vehicle status is improved, but driver workload increases to the point of overload and performance impairment
Solution Approach 1:
The system dynamically adjusts the amount and type of information presented to the driver based on real-time workload assessment. When workload is high, non-essential information is suppressed or delayed; when workload is low, more detailed information is provided. This dynamic adaptation resolves the contradiction by making information output flexible rather than fixed.
Solution Approach 2:
The system changes the parameter of information output volume and complexity based on the driver's current workload state. By monitoring workload indicators and adjusting information presentation accordingly, the system maintains optimal driver awareness without causing overload, thus preserving driver performance.
2Loss of information
If all vehicle system information is presented simultaneously to the driver, then complete situational awareness is achieved, but driver cognitive load increases resulting in overload and reduced performance
Solution Approach 1:
The system segments information presentation by priority levels and timing. Critical safety-related information is presented immediately, while non-essential information is delayed or suppressed during high workload periods. This segmentation allows complete information availability without simultaneous presentation, reducing cognitive load while maintaining situational awareness.
Solution Approach 2:
The system uses periodic workload assessment to determine information presentation timing. Instead of continuous simultaneous presentation, information is delivered in periodic cycles aligned with driver workload states, allowing digestion of critical information before presenting additional details.
3Productivity
If the system withholds low-priority information during high workload periods, then driver overload is prevented, but information may be withheld indefinitely reducing overall information delivery
Solution Approach 1:
The system buffers low-priority information for later delivery once workload decreases. By preliminarily storing rather than immediately presenting such information, the system prevents overload while ensuring eventual delivery, thus balancing driver performance protection with complete information communication.
Solution Approach 2:
The system continuously monitors driver workload and uses this feedback to dynamically adjust information presentation timing. When workload decreases, the system feeds back to present previously withheld information, ensuring that performance protection does not result in permanent information loss.
Data Source
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AI summary
The present invention relates to a method and system of controlling the output of information to a driver. It provides to monitor at least one operating parameter of a vehicle and to estimate driver workload is estimated based on said at least one operating parameter, using a plurality of thresholds (HIGH, MEDIUM, LOW) defining driver workload ratings. Output of information to the driver is controlled based on the estimated driver workload rating. To ensure that also low priority information is outputted, the invention provides to periodically cycling through some or all of those defined driver workload ratings having a lower rating than the current estimated workload rating.