Lane Deviation Prevention Using Rumble Strip Detection
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Solution Overview
Problem
Existing automatic lane deviation prevention systems struggle to effectively prevent lane deviation in extreme weather conditions, such as thick fog, strong snowfall, or when white lane markers are not detectable by vehicle-mounted cameras, leading to reduced safety and increased risk of collisions.
Innovation Solution
An automotive lane deviation prevention apparatus that includes a processor to detect when a vehicle is traveling on road-surface irregularities, such as rumble strips, and actively decelerates the vehicle using a control unit and actuator system to enhance safety through both active and passive warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vehicle-mounted camera is used to detect lane markings for lane deviation prevention, then the system can provide active lane keeping assistance, but the system fails to detect lane markings under extreme weather conditions such as thick fog, strong snowfall, or when lane markers are covered by snow
Solution Approach 1:
The patent introduces rumble strips as an intermediary tactile warning device that operates independently of visual conditions. When the camera fails to detect lane markings due to extreme weather, the rumble strip system activates to provide haptic feedback to the driver, serving as a mediator that maintains lane deviation prevention functionality when the primary visual detection system fails.
Solution Approach 2:
The system employs multiple independent detection methods (visual camera detection and tactile rumble strip detection) that can self-activate based on environmental conditions. When visual detection fails, the tactile system automatically takes over without requiring external intervention, enabling the system to serve itself across varying operational conditions.
2Ease of operation
If rumble strips are used to warn drivers of lane deviation, then driver awareness is improved, but the host vehicle risks collision with objects or running off the roadway without active prevention
Solution Approach 1:
The system implements a feedback loop where the rumble strip detection provides real-time information about vehicle position relative to lane markings. This feedback enables the control unit to activate warning signals and steering assistance to correct lane deviation before collision or roadway departure occurs, transforming passive driver awareness into active prevention.
Solution Approach 2:
The system takes preliminary action by detecting rumble strip vibrations and activating warning signals before the driver actually deviates into dangerous territory. The control unit proactively engages steering assistance and warning systems based on early detection of lane crossing vibrations, preventing harmful outcomes before they occur.
3Device complexity
If the system only provides passive warnings to the driver, then the system remains simple, but active safety enhancement is insufficient in critical situations
Solution Approach 1:
The control unit is designed with multi-functionality, serving both as a simple warning system and an active safety system. The same control unit processes rumble strip detection data and can execute multiple functions: issuing passive warnings through the audio output device and actively controlling the steering actuator to prevent lane deviation, thereby achieving universal functionality without proportionally increasing complexity.
Data Source
AI summary
An automotive lane deviation prevention (LDP) apparatus includes a control unit detecting whether a host vehicle is in a specific state where the host vehicle is traveling on road-surface irregularities formed on or close to a lane marking line. The control unit actively decelerates the host vehicle when the host vehicle is in the specific state where the host vehicle is traveling on the road-surface irregularities.