Vehicle Lane Keeping Control with Driver State Feedback
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Solution Overview
Problem
Current driver assistance systems may fail to prevent accidents when a driver's health deteriorates or they fall asleep, as they may not detect warning signals, leading to automatic lane correction that can result in collisions.
Innovation Solution
A method for open-loop or closed-loop control of a driver assistance system that uses sensors to detect lane markings and driver operations, outputting warning signals and enabling automatic steering and braking interventions only if the driver does not respond, ensuring the vehicle remains on the lane or slows to a stop if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic lane correction is activated to prevent lane departure, then lane keeping reliability is improved, but the risk of collision increases when the driver is unresponsive
Solution Approach 1:
The system continuously monitors driver operating device operations and uses this feedback to dynamically adjust automatic intervention. When driver input is detected, automatic lane correction is suppressed; when no driver input is detected within a threshold period, automatic correction is activated. This feedback mechanism resolves the contradiction by making the system responsive to actual driver state, preventing collisions while maintaining lane keeping reliability.
Solution Approach 2:
The system dynamically adjusts its control behavior based on real-time detection of driver operations. The threshold period for activating automatic correction is variable and adapts based on whether driver input is detected. This dynamic adjustment allows the system to switch between manual and automatic control modes, resolving the contradiction between maintaining lane position and avoiding collision with unresponsive drivers.
2Ease of operation
If warning signals are output to prompt driver intervention, then driver awareness is improved, but the system fails when the driver cannot detect the warning
Solution Approach 1:
The system implements a threshold period mechanism that activates automatic correction before the driver can potentially cause harm. By monitoring for a predetermined time without detecting driver operations, the system proactively determines driver unresponsiveness and activates automatic intervention. This preliminary action ensures system reliability even when the driver cannot detect warnings due to health issues or sleep.
Solution Approach 2:
The system introduces an intermediary monitoring mechanism that detects driver operations through sensor devices. This intermediary layer between the driver and the vehicle control system allows the system to infer driver state and activate appropriate responses. When the intermediary detects no driver operations within the threshold period, it triggers automatic correction, ensuring reliability regardless of the driver's ability to perceive warnings.
3Manufacturing precision
If the vehicle is automatically pulled into the middle of the lane, then lane position correction is improved, but the vehicle may come to standstill causing collisions
Solution Approach 1:
The system dynamically adjusts the correction behavior based on real-time detection of driver operations. Rather than continuously pulling the vehicle to the lane center, the system activates correction only when no driver input is detected within the threshold period. This dynamic approach maintains lane position correction effectiveness while avoiding the harmful effect of continuous intervention that could cause standstill and collision.
Solution Approach 2:
The system applies partial correction action by monitoring for a threshold period before activating automatic intervention. Instead of immediately correcting any lane departure tendency, the system waits to confirm driver unresponsiveness before acting. This partial action approach ensures that correction is applied only when necessary, preventing excessive intervention that could cause the vehicle to come to standstill and create collision risk.
Data Source
AI summary
A method for open-loop or closed-loop control of a driver assistance system of a vehicle, including: a) using a first sensor device to detect from a roadway at least one lane and a roadway marking that separates the lane from an edge of the roadway; b) using a second sensor device to detect operation of at least one operating device of the vehicle that influences the driving dynamics of the vehicle by virtue of the driver; c) using steering actuators and/or brake actuators to influence the driving dynamics of the vehicle; and d) outputting, if there is a threat of the vehicle leaving the lane, as detected by the first sensor device, a first warning signal. A related driver assistance system is also described.