Head-Up Gap Markers for Automated Longitudinal Control Feedback
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Solution Overview
Problem
Existing driver assistance systems in vehicles often fail to provide intuitive and distraction-free visual feedback regarding their activity, particularly in automated longitudinal control, leading to potential distrust and cognitive strain on drivers.
Innovation Solution
A method and system that uses a head-up display to visually represent the current and intended gap to the vehicle ahead, adjusting the display position based on the vehicle's position, allowing continuous and stable feedback without requiring excessive cognitive effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If driver assistance systems provide detailed visual information about their activity, then the driver gains better understanding and trust in the system, but the driver experiences increased cognitive strain and distraction
Solution Approach 1:
The visual feedback is segmented into distinct functional elements: gap markers indicating distance to vehicles ahead, control status indicators showing system state, and intervention warnings alerting to upcoming actions. Each element serves a specific informational purpose, allowing the driver to process only relevant details rather than overwhelming comprehensive data.
Solution Approach 2:
The system uses spatial positioning and scaling of visual elements to encode multiple dimensions of information simultaneously. Gap markers are positioned at distances corresponding to actual vehicle spacing, creating a spatial map that intuitively conveys relative positions without requiring numerical processing by the driver.
2Loss of information
If the system provides comprehensive feedback about all control activities, then the driver has complete awareness of system behavior, but the feedback becomes complex and difficult to monitor without distraction
Solution Approach 1:
The system extracts and highlights only the most critical control parameters for driver awareness: the gap distance to vehicles ahead and the current control status. Less critical information is either omitted or presented in simplified form, reducing overall feedback complexity while maintaining essential awareness.
Solution Approach 2:
Instead of presenting raw sensor data and control calculations, the system inverts the information flow by presenting processed, intuitively understood visual representations. Rather than showing the driver control signals and sensor readings, it displays gap markers and status indicators that directly represent the driving situation.
3Measurement precision
If the visual display shows detailed system status information, then the driver can monitor system activity accurately, but the display requires the driver's attention and causes distraction from traffic
Solution Approach 1:
The system merges the assistance system's visual feedback with the driver's natural view of the road environment. Gap markers are superimposed on the actual road scene, and display elements are positioned to align with corresponding physical objects, allowing the driver to monitor system status while maintaining contextual awareness of the driving situation.
Solution Approach 2:
The system creates visual copies of physical objects and relationships in the driving environment. Gap markers replicate the spatial arrangement of vehicles ahead, and display elements mirror the actual road layout, enabling the driver to understand system status through familiar visual metaphors rather than abstract indicators.
Data Source
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AI summary
The invention relates to a method (1) for automatic longitudinal control of a motor vehicle, a corresponding assistance system, and a motor vehicle equipped or configured accordingly. In the method (1), a display position for showing a respective gap marker (4, 6) via a head-up display is determined from the position of a vehicle (3) in front, as part of a user-defined setting for the longitudinal control. Upon user input to set a new, modified gap, the previous gap marker (4) and the new gap marker (6) are initially displayed simultaneously at the corresponding display positions via the head-up display. When the longitudinal control reaches the new gap, the head-up display is activated to show only the new gap marker (6) and no longer the previous gap marker (4).