Lane Departure Control Using Steering Torque Intent Detection
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Solution Overview
Problem
Existing lane departure prevention systems cannot determine whether a driver intends to change lanes based on their own intention, leading to unnecessary warnings and steering interventions, which can cause anxiety and fail to alert the driver in situations like driving on curves.
Innovation Solution
A lane departure prevention device equipped with a vehicle position detection system, steering torque detection, and a control unit that assesses the vehicle's position and steering torque to differentiate between intentional lane changes and unintended departures, allowing for the prohibition of warnings and steering interventions when the driver's intention is clear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lane departure prevention control performs steering and warning when risk is detected, then the vehicle can be prevented from departing from the lane, but the driver feels anxiety due to unnecessary warnings and steering interventions when intending to change lanes
Solution Approach 1:
The system performs preliminary detection of steering torque before the vehicle actually departs from the lane. By detecting the driver's intention to steer early (when steering torque exceeds the threshold), the system can preliminarily determine that this is an intentional lane change rather than an unintentional departure, and thus regulate the warning and steering control accordingly, preventing driver anxiety while maintaining safety.
2Reliability
If the system issues warning and performs steering when vehicle position indicates lane departure risk, then lane departure is prevented, but the warning cannot differentiate between intentional lane changes and unintended departures
Solution Approach 1:
The steering torque detection device serves as an intermediary indicator to infer the driver's intention. By measuring the steering torque as an intermediate parameter, the system can determine whether the driver is actively steering (intentional lane change) or passively drifting (unintentional departure), thus recovering the lost information about driver intention that cannot be obtained from vehicle position alone.
3Ease of operation
If the system regulates steering and warning only after sudden steering operation is detected, then the control can avoid interfering with intentional lane changes, but it cannot prevent warnings before the risk is detected
Solution Approach 1:
The system performs preliminary detection and determination of driver intention using steering torque before the vehicle actually departs from the lane or before the risk is fully detected. By determining the driver's intention in advance through steering torque measurement, the system can proactively regulate the warning and steering control, preventing unnecessary warnings from being issued in the first place, thus eliminating driver anxiety before it occurs.
Data Source
AI summary
Provided is a lane departure prevention device that, when a risk that a vehicle departs from a lane is determined, issues a warning, steers a steering wheel, and prevent the departure. An electronic control unit is configured to, when a determination is made that the vehicle travels obliquely to the lane based on a position of the vehicle detected by a CCD camera and a determination is made that steering torque detected by a torque sensor is equal to or greater than a reference steering torque, start prohibition of issuing of the warning and prohibition of steering of the steering wheel, and in a situation where issuing of the warning and steering of the steering wheel are prohibited, when a determination is made that the vehicle terminates traveling obliquely to the lane, release the prohibition of issuing of the warning and the prohibition of steering of the steering wheel.