Lane Departure Warning Device Steering Estimation
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Solution Overview
Problem
Lane departure warning systems often generate false warnings due to delayed image recognition, mistakenly alerting drivers who are intentionally avoiding lane departure, leading to driver irritation and reduced system reliability.
Innovation Solution
A lane departure warning device that estimates the steering amount of the vehicle based on parameters like steering angle, yaw rate, and lateral G, and determines the departure possibility without relying on the time to line crossing (TLC), using the distance from the front wheel to the marking line, to minimize false warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system uses image recognition to detect lane markings and calculate TLC (Time to Line Crossing), then the lane departure warning function is provided, but false warnings occur when the driver performs quick steering to avoid lane departure
Solution Approach 1:
The system performs preliminary detection of driver intention by monitoring steering angle, yaw rate, and lateral G acceleration before lane departure occurs. By detecting quick steering patterns that indicate intentional avoidance maneuver, the system prepares to suppress warnings in advance, eliminating the delay caused by waiting for image recognition to catch up with vehicle behavior.
Solution Approach 2:
The system continuously monitors vehicle dynamics parameters (steering angle, yaw rate, lateral G) and uses this feedback to determine driver intention. This real-time feedback loop allows the system to distinguish between unintentional lane drift and intentional avoidance maneuvers, providing accurate warning suppression without relying on delayed image recognition of the vehicle's position relative to lane markings.
2Reliability
If the system provides warning based on TLC less than predetermined time, then lane departure is predicted, but irritation occurs when driver is intentionally avoiding departure
Solution Approach 1:
The system performs preliminary detection of driver intention through steering behavior analysis before the lane departure actually occurs. By identifying quick steering patterns that indicate intentional avoidance, the system suppresses warnings in advance, preventing driver irritation before it can occur.
Solution Approach 2:
The system dynamically adjusts warning suppression based on real-time analysis of steering behavior patterns. When quick steering exceeding thresholds is detected, the system dynamically suppresses warnings; when normal steering is detected, warnings remain active. This dynamic adaptation eliminates false warnings while maintaining necessary alerts.
Data Source
AI summary
LANE DEPARTURE WARNING DEVICE It is an object to provide a lane departure warning device 10 capable of generating almost no false warning if a driver performs an avoiding operation of a lane departure. The lane departure warning device 10 estimates the steering amount of the own vehicle 5 toward the center of the lane or the amount correlating with this steering amount based on the parameter representing the vehicle behavior such as the steering angle, the yaw rate and the lateral G, thereby detecting the state of the vehicle steering toward the center of the lane when a driver is performing an avoiding operation to avoid the lane departure (quick steering), and determining whether or not the possibility of the vehicle's departure from the lane 30 is high without using the time TLC and its threshold value Ts, but only based on the determination whether or not the distance D1 or D2 from the outer edge of the front wheel to the marking line 31, 32 is less than the threshold value Ds if the driver performs the avoiding operation to avoid the lane departure (quick steering).