Driving Assistance Deactivation via Rumble Strip Detection
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Solution Overview
Problem
Existing methods for deactivating driving assistance systems in autonomous or semi-autonomous vehicles are inadequate as they rely on signaling or mapping, which can be unreliable, especially in detecting areas unsuitable for autonomous driving such as roadworks or toll zones.
Innovation Solution
A method and device that utilize sensors to detect vertical road profiles, specifically rumble strips, to deactivate driving assistance systems by comparing the number of detected rumble strips to a threshold, ensuring safe transitions from autonomous to manual control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving assistance systems rely on signaling or mapping to detect areas unsuitable for autonomous driving, then the system can identify road conditions, but the detection reliability deteriorates in areas such as roadworks or toll zones where signage may be missing or altered
Solution Approach 1:
The patent introduces rumble strips as an intermediary physical marker on the road surface to signal areas unsuitable for autonomous driving. These strips serve as a reliable intermediary that directly indicates road conditions without relying on complex signage or mapping data, thereby improving detection reliability while maintaining system simplicity
Solution Approach 2:
The patent replaces the mechanical/visual detection system (cameras detecting traffic signs) with a tactile detection system (sensors detecting rumble strips on the road surface). This substitution improves reliability by using physical road markers that are harder to miss or misinterpret, while reducing the complexity of visual processing systems
2Measurement precision
If the system uses sensors to detect vertical road profiles and rumble strips, then detection accuracy improves, but the device complexity increases due to additional sensor integration
Solution Approach 1:
The patent makes existing vehicle sensors (accelerometers, suspension sensors) multi-functional by using them both for their original purposes (vehicle stability control, ride comfort) and for detecting rumble strips. This approach improves measurement precision for road condition detection without significantly increasing device complexity, as the same hardware serves multiple functions
Solution Approach 2:
The system uses the vehicle's own existing sensor infrastructure to detect road conditions, rather than adding dedicated external detection systems. The vehicle's suspension and acceleration sensors naturally respond to rumble strip vibrations, allowing the system to self-utilize available components for improved detection accuracy
Data Source
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Figure 3
AI summary
The present invention relates to a method and a device for deactivating at least one driving assistance system of a vehicle (10). To this end, a processor receives first information representing a vertical road profile from a set of sensors integrated in said vehicle (10), obtains second information representing the presence of rumble strips (11) based on said first information, and deactivates the at least one driving assistance system based on said second information.