Vehicle Steering Control for Driver Visibility
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Solution Overview
Problem
The existing vehicle control systems face challenges in accurately detecting the facial direction of a driver when the steering wheel obstructs the camera's view, leading to reduced precision in driver condition detection.
Innovation Solution
A control system that includes a driver monitor camera, a steering system, and a steering control part that sets an upper limit for the steering wheel's angle to prevent the driver's face from being hidden, ensuring at least one eye remains visible, thereby maintaining detection precision during steering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the steering wheel is positioned between the driver monitor camera and the driver, then the steering system can be operated normally, but the driver's face becomes hidden by the steering wheel when the steering angle increases, reducing detection precision
Solution Approach 1:
The system dynamically adjusts the upper limit value of the steering angle based on the driver's facial image. When the driver's face is fully visible, a larger steering angle is permitted. When the face becomes hidden by the steering wheel, the system reduces the upper limit value of the steering angle to prevent further obscuration, thus maintaining detection precision while allowing normal steering operation.
Solution Approach 2:
The system continuously monitors the driver's facial image and provides feedback to adjust the steering angle upper limit. The detection unit detects whether the driver's face is hidden by the steering wheel, and this detection result is fed back to the control unit, which then adjusts the upper limit value of the steering angle accordingly to maintain optimal detection conditions.
2Measurement precision
If the upper limit value of steering angle is restricted to keep the driver's face visible, then detection precision is maintained, but the steering range is limited
Solution Approach 1:
The upper limit value of the steering angle is not fixed but dynamically adjusted based on real-time detection of the driver's facial visibility. This allows the system to adapt the steering range to current conditions, maximizing the steering angle when the face is visible and reducing it only when necessary to maintain detection precision.
Solution Approach 2:
The system changes the parameter of steering angle upper limit based on the detection results. By adjusting this parameter according to whether the driver's face is hidden by the steering wheel, the system optimizes both detection precision and steering capability without unnecessary restrictions.
Data Source
AI summary
The control system of a vehicle comprises: a driver monitor camera capturing an face of a driver of a vehicle to generate a facial image of the driver; a driver condition detection part configured to detect a condition of the driver based on the facial image; a steering system operating wheels and a steering wheel of the vehicle; and a steering control part configured to set a target turning angle of the wheels and a target steering angle of the steering wheel to control the steering system. The steering control part is configured to make an upper limit value of the target steering angle a value up to a maximum angle when one eye of the driver is not hidden by the steering wheel in the facial image generated when the driver is facing the front.