A method for determining the exit of a lane keeping assist function based on curve curvature

By establishing a linear relationship between curve curvature and exit time threshold in the lane keeping assist function, the problem of judging the exit timing of lane keeping assist function in curve scenes is solved, and a safer and more user-friendly lane assist function is achieved.

CN117508165BActive Publication Date: 2025-03-25DONGFENG MOTOR GRP
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Patent Information

Application Number
CN202311555821.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-17
Publication Date
2025-03-25
Estimated Expiration
2043-11-17

AI Technical Summary

Technical Problem

The prior art is difficult to accurately determine the exit timing of lane keeping assist function in curved scenes, resulting in the vehicle being likely to deviate from the lane again in curved scenes.

Method used

By establishing a linear relationship between the curve curvature and the timeout exit time threshold, the vehicle attitude stabilization time threshold, and the driver takeover torque threshold, these thresholds are calculated based on the curve curvature, and exit the lane keeping auxiliary function when the corresponding exit judgment conditions are met.

Benefits of technology

It improves the accuracy of judging the exit timing of lane keeping assist function, adapts to different curve curvature conditions, ensures the safety of lane assist function, and improves the user's driving experience.

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Abstract

The present invention discloses an exit judgment method for a lane keeping assist function based on curve curvature, comprising: calculating a timeout exit time threshold, a vehicle posture stabilization time threshold, and a driver takeover torque threshold according to the curve curvature; the curve curvature is obtained according to a driving image containing lane lines acquired by an on-board sensor device; if any one of a timeout judgment condition, a stability judgment condition, and a driver takeover judgment condition is currently met, the lane keeping assist function is exited; when the lane keeping assist function is turned on for a duration exceeding the timeout exit time threshold, the timeout judgment condition is met; when the vehicle maintains a stable state and the duration exceeds the vehicle posture stabilization time threshold, the stability judgment condition is met; when the driver's steering torque exceeds the driver takeover torque threshold, the driver takeover judgment condition is met.
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