Adaptive Distance Warning Thresholds for Lane-Change Scenarios
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Solution Overview
Problem
Existing distance information systems in vehicles often trigger unnecessary warnings due to driver behavior or temporary inaccuracies, leading to driver irritation and potential system shutdown.
Innovation Solution
The system adjusts the minimum distance and time period criteria based on detected or assumed lane-change situations, using sensors like radar or optical sensors, to prevent false warnings while ensuring critical situations are still acknowledged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the minimum distance and time period criteria are fixed, then the system provides consistent warning behavior, but unnecessary warnings occur during lane-change situations causing driver irritation
Solution Approach 1:
The patent applies dynamics by making the minimum distance and time period criteria variable rather than fixed. The control unit dynamically adapts these parameters based on detected driving situations, particularly lane-change scenarios. When a lane-change is detected, the system temporarily modifies the warning thresholds to accommodate the expected temporary distance reduction, thereby preventing false warnings while maintaining reliability in normal driving conditions.
Solution Approach 2:
The patent implements parameter changes by adjusting the minimum distance and time period values based on the detected driving situation. The control unit modifies these parameters dynamically - reducing the minimum distance threshold or extending the time period when lane-changes are detected, which prevents unnecessary warnings during transient situations while maintaining strict monitoring during normal driving.
2Measurement precision
If the minimum distance is reduced to detect closer situations, then critical close-proximity situations are detected, but false warnings occur during normal lane-changing maneuvers
Solution Approach 1:
The system dynamically adjusts the minimum distance threshold based on the detected driving situation. During normal driving, a stricter minimum distance is applied for high sensitivity. When a lane-change situation is detected, the system temporarily relaxes this threshold or extends the time period requirement, allowing the vehicle to temporarily be closer without triggering false warnings, while maintaining detection precision for actual critical situations.
Solution Approach 2:
The system performs preliminary detection of lane-change intentions (through sensor data analysis) before the actual close-proximity situation occurs. By detecting the lane-change maneuver in advance, the control unit can pre-adjust the warning criteria to prevent false alarms during the anticipated temporary distance reduction, while maintaining strict monitoring ready to activate if the situation becomes genuinely critical.
3Speed
If the time period for distance violation is shortened, then rapid critical situations are detected quickly, but transient distance reductions during lane-changes trigger warnings
Solution Approach 1:
The system dynamically adjusts the time period criterion based on the detected driving situation. During normal driving, a shorter time period is used for rapid warning activation. When a lane-change situation is detected, the system temporarily extends this time period, allowing transient distance reductions during the maneuver to occur without triggering warnings, while maintaining rapid response capability for genuine critical situations that persist beyond the extended threshold.
Data Source
AI summary
A distance information system and method are provided for a motor vehicle. At least one sensor measures the distance between the own motor vehicle and a vehicle situated ahead. A control unit is configured to determine as a function of signals of the sensor whether the measured distance is less than a specified minimum distance for longer than a specified time period. At least one optical display is activated when it is determined that the measured distance is less than the specified minimum distance for more than a specified time period. The minimum distance and/or the time period is/are defined as a function of a detected or inferred lane-change situation.