Steering Shaft Magnetic Sensing Without Separate Cable Links
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Solution Overview
Problem
Conventional rear wheel steering systems require a separate cable to connect the sensing unit to the motor, increasing complexity and cost, and necessitate additional space for connection components.
Innovation Solution
A steering device with a magnet attached to the steering shaft and a sensing unit directly attached to a housing connected to a circuit board, allowing direct detection of the magnetic field without a separate cable, and a control module to adjust the rear wheel angle based on the detected rotation of the front wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate cable is used to connect the sensing unit to the motor, then the motor and sensor can be electrically connected, but the device complexity and cost increase
Solution Approach 1:
The sensing unit is integrated directly onto the circuit board of the control module, merging the sensor and control electronics into a single unified component. This eliminates the need for separate cables while maintaining electrical connection reliability through direct trace connections on the circuit board.
Solution Approach 2:
The circuit board serves as an intermediary substrate that provides both mechanical support and electrical connection pathways between the sensing unit and the motor control circuitry, replacing the need for flexible cables with rigid traced connections.
2Reliability
If a separate cable is used to connect the sensing unit to the motor, then electrical connection is achieved, but additional space is required for connection components
Solution Approach 1:
The sensing unit and control module are merged into a single integrated assembly where the sensor is mounted directly on the control module's circuit board. This consolidation eliminates the space required for separate cable connections, connectors, and routing pathways.
Solution Approach 2:
The circuit board performs multiple functions: it serves as the electrical connection medium, the mechanical mounting substrate for the sensing unit, and the control logic platform. This multi-functionality eliminates the need for dedicated cable and connector components.
3Device complexity
If the sensing unit is directly attached to the housing connected to the circuit board, then the structure is simplified and costs are reduced, but the detection precision must be maintained
Solution Approach 1:
The sensing unit is directly mounted on the housing of the control module, creating a compact integrated assembly. This direct attachment simplifies the overall structure while maintaining detection precision through careful positioning of the magnet and sensor to ensure accurate magnetic field measurement for rotation angle detection.
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
Simplifies the structure, reduces costs, and eliminates the need for additional space by directly connecting the sensing unit to the circuit board, enhancing the detection of the front wheel rotation angle and facilitating easier control of the rear wheel.
Implementation Method 1
a sensing unit disposed on a surface of the control module and configured to detect a magnetic field. The control module is configured to detect a rotation angle of a wheel linked to the steering wheel through the magnetic field detected by the sensing unit
Data Source
AI summary
A steering device includes a steering shaft that moves in a longitudinal direction in conjunction with rotation of a steering wheel, a magnet attached to the steering shaft, a control module disposed adjacent to the steering shaft, and a sensing unit disposed on a surface of the control module to detect a magnetic field. The control module detects a rotation angle of a wheel linked to the steering wheel through the magnetic field detected by the sensing unit.