Detachable Steering Dial With Hall Sensing for Emergency Wheel Control
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Solution Overview
Problem
The need arises for a method to utilize the space previously occupied by the steering wheel in vehicles with advanced self-driving capabilities, while allowing for driver intervention when necessary, as conventional steering mechanisms become obsolete in higher self-driving levels.
Innovation Solution
A detachable dial equipped with a permanent magnet and a hall sensor is used to calculate the rotation angle, which is then transmitted to a road wheel actuator to control tire position, enabling driver-controlled steering when required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a steering wheel is removed in level 4 or higher self-driving, then vehicle internal space is optimized for use, but the ability to respond to emergency situations requiring driver control is lost
Solution Approach 1:
The steering function is segmented from the traditional steering wheel into a separate detachable dial that can be independently activated. This allows the main vehicle space to be optimized for self-driving while preserving emergency control capability through the optional dial attachment.
Solution Approach 2:
The steering control interface transitions from a static steering wheel to a dynamic system where the detachable dial can be attached or removed based on driving conditions. This dynamic configuration allows the vehicle to adapt between full self-driving mode and emergency driver intervention mode.
2Device complexity
If a traditional steering wheel is replaced with a detachable dial, then device complexity is reduced, but the precision of steering angle detection may be affected
Solution Approach 1:
The mechanical steering angle sensor system is replaced with a magnetic field-based detection system using permanent magnets and hall sensors. This substitution reduces mechanical complexity while maintaining or improving detection precision through non-contact magnetic field sensing.
Solution Approach 2:
The detection method transitions from mechanical position sensing to magnetic field parameter detection. By utilizing magnetic field strength and direction parameters detected by hall sensors, the system achieves precise steering angle measurement without complex mechanical components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows the removal of the steering wheel in higher self-driving levels, optimizing vehicle space utilization and enabling emergency driver control through the detachable dial.
Implementation Method 1
a hall sensor detecting a position of a magnet provided in the dial
Data Source
AI summary
The disclosure relates to a steering control device and method. According to the disclosure, a steering control device comprises a detachable dial including a permanent magnet, a hall sensor detecting a position of a magnet provided in the dial, and a controller receiving manager authentication information, calculating a rotation angle of the dial based on a position of the permanent magnet received from the hall sensor when the manager authentication information is valid, and transmitting a control signal to a road wheel actuator (RWA) to move a tire to a position corresponding to the rotation angle.