Driver Assistance System Activability Display with Reliability Value
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Solution Overview
Problem
Driver assistance systems, such as traffic jam assistance, often display activation information briefly due to numerous and rapidly changing reasons for deactivation, leading to driver frustration and uncertainty about the usability of the system.
Innovation Solution
A method that determines a reliability value for the probable activity time of the driver assistance function and adjusts the output of activatability information based on this value, providing the driver with a clearer understanding of when the system can be used, including displaying expected activity time or distance and modifying display elements like color and font size according to reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If activation information is displayed to indicate when driver assistance function is available, then driver awareness of system availability is improved, but the information is displayed only briefly and causes driver frustration due to frequent changes in activation conditions
Solution Approach 1:
The system performs preliminary calculation of the expected activity time before the driver attempts activation. By determining in advance how long the driver assistance function will remain active based on current sensor data and environmental factors, the system provides the driver with reliable temporal information about system availability, reducing frustration from brief or unpredictable displays
Solution Approach 2:
The system provides feedback to the driver about the expected duration of driver assistance function availability. This feedback loop allows the driver to understand when the system will be available and for how long, improving trust and reducing unnecessary activation attempts by providing transparent information about system state and predicted behavior
2Reliability
If multiple deactivation criteria are monitored to ensure safe operation, then system safety is improved, but the number of activation obstacles increases and reduces system usability
Solution Approach 1:
The system pre-calculates the expected activity time by evaluating all deactivation criteria before activation occurs. This preliminary assessment considers multiple safety conditions (sensor availability, environmental factors, road conditions) and determines the predicted duration of safe operation, allowing the driver to make informed decisions about activation without encountering unexpected deactivation
Solution Approach 2:
The expected activity time calculation acts as an intermediary between multiple deactivation criteria and the driver. Instead of presenting the driver with a complex list of safety conditions that prevent activation, the system synthesizes this information into a single, understandable metric (expected duration), simplifying the decision-making process while maintaining comprehensive safety monitoring
Data Source
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AI summary
A method for operating a driver assistance system (6), performing a driver assistance function, of a motor vehicle (5), which driver assistance function is activable by the driver only if at least one activation criterion is satisfied, and is automatically deactivated if at least one deactivation criterion is satisfied, wherein if the driver assistance system (6) is activable then a piece of activability information indicating the activability is output to the driver and a probable activity time before the onset of a deactivation criterion is ascertained and is output together with the activability information, wherein a reliability value for the activity time is determined at the probable activity time and the output of the activability information and/or of the activity time is adjusted on the basis of the reliability value.