Lane Departure Warning System with Dynamic Deactivation Threshold
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Solution Overview
Problem
Existing driver assistance systems for lateral vehicle guidance, such as lane departure warning systems, do not adequately consider the driver's condition and environmental factors, allowing for easy deactivation of countersteering interventions, which can be problematic in unsafe situations like lane departure due to driver fatigue or nearby objects.
Innovation Solution
The system increases the threshold value for deactivating countersteering torque and issues warnings when an object signal or low attention value is detected, making it more difficult for drivers to override the intervention, and can generate countersteering torque earlier when safety is compromised.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driver assistance system allows easy deactivation of countersteering torque through driver action, then the ease of operation is improved, but the reliability deteriorates when the driver is fatigued or in unsafe situations
Solution Approach 1:
The system dynamically adjusts the threshold value for deactivation based on detected conditions. When objects are detected adjacent to the lane marking or when driver attention is low, the threshold is increased, making deactivation more difficult. This dynamic adaptation allows the system to maintain ease of operation under normal conditions while ensuring reliability in unsafe situations.
Solution Approach 2:
The system continuously monitors driver attention level and environmental conditions, using this feedback to adjust the deactivation threshold in real-time. When the driver's attention is detected to be low or when hazardous objects are present, the system responds by raising the threshold, thereby preventing inappropriate deactivation while maintaining normal operability when conditions are safe.
2Reliability
If the system generates countersteering torque earlier when safety is compromised, then the reliability is improved, but the device complexity increases due to additional sensors and evaluation mechanisms
Solution Approach 1:
The system uses a camera and evaluation unit that serve multiple functions: detecting lane markings, identifying objects adjacent to the lane, and assessing driver attention. By making these components multi-functional, the system achieves improved reliability through early intervention without proportionally increasing device complexity, as the same hardware performs multiple safety-related tasks.
3Reliability
If the system monitors driver attention and environmental objects continuously, then the reliability is improved, but the use of energy increases
Solution Approach 1:
The system performs continuous monitoring but processes and evaluates data at specific intervals or when trigger conditions are met. The camera captures images continuously, but the evaluation unit activates processing only when lane departure is detected or when specific conditions warrant attention assessment, thereby reducing overall energy consumption while maintaining reliability through periodic evaluation of critical parameters.
Data Source
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AI summary
The vehicle has a driver assistance system for transverse controlling of the vehicle, particularly a lane departure warning system, which is designed for generating a counter steering moment when the vehicle departs the lane. The driver assistance system is designed for the driver of the vehicle for increasing the threshold values (12,13) or for less consideration of the action for over controlling or for delivering a warning parallel to the counter steering moment, when an object signal is released by displaying a relevant object adjacent to a lane marking of the current lane. : An independent claim is also included for a method for assisting a driver of a motor vehicle. USE : Vehicle. ADVANTAGE : The vehicle has a driver assistance system for transverse controlling of the vehicle, particularly a lane departure warning system, which is designed for generating a counter steering moment when the vehicle departs the lane, and thus ensures an improved vehicle. DESCRIPTION OF DRAWINGS : The drawing shows a graphical representation of the steering torque of vehicle with respect to the time. 12,13 : Threshold values.