3D Hall Sensor Shift Lever Position Detection
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Solution Overview
Problem
Conventional electronically controllable transmission systems require multiple sensors and additional structures to maintain a constant gap between the magnet and sensor, leading to increased size, reduced layout utilization, and higher costs.
Innovation Solution
The use of a three-dimensional (3D) hall sensor that can detect the movement of a magnet on all X-, Y-, and Z-axes, allowing for the sensing of a shift lever position without maintaining a constant gap between the magnet and sensor, thereby simplifying the structure and reducing the need for additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional 2D hall sensor is used to sense the position of a shift lever, then the magnetic flux density can be detected, but multiple sensors and additional structures are required to maintain a constant gap between the magnet and sensor, increasing device complexity
Solution Approach 1:
The patent transitions from a conventional 2D hall sensor to a 3D hall sensor, adding the Z-axis dimension to the sensing capability. This dimensional upgrade allows the sensor to detect magnetic flux density variations in three-dimensional space, eliminating the need for multiple 2D sensors and complex mechanical structures to maintain constant gap distances.
Solution Approach 2:
The 3D hall sensor performs multiple sensing functions simultaneously - it can detect magnetic flux density in X, Y, and Z directions with a single device, replacing what would traditionally require multiple 2D sensors and associated mechanical structures. This multi-functionality reduces overall system complexity.
2Reliability
If multiple sensors and additional structures are installed to maintain constant gap, then measurement reliability is improved, but the system size increases and layout utilization is reduced
Solution Approach 1:
The patent merges multiple sensing functions into a single 3D hall sensor device. Instead of having separate 2D sensors positioned at different locations with complex mechanical structures to maintain their relative positions, one 3D sensor integrates all necessary sensing capabilities, reducing the overall system volume.
3Measurement precision
If multiple sensors and additional structures are used, then sensing accuracy is maintained, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates unnecessary mechanical structures (brackets, guide portions, guide grooves, rails) that were required to maintain constant gap distances in conventional 2D sensor systems. By removing these extraneous components and replacing them with a 3D hall sensor, manufacturing complexity and cost are reduced while maintaining sensing accuracy.
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 enables accurate and stable sensing of the shift lever position using a single magnet and sensor, reducing the complexity and cost of the system while maintaining accurate magnetic flux density detection.
Implementation Method 1
the 3D sensor senses a position of the magnet on all X-, Y-, and Z-axes
Data Source
AI summary
An apparatus for electronically controllable transmission is provided to shift gears by moving a shift lever and sensing the magnetic flux density of a magnet, which moves based on the rotation of the shift lever, using a three-dimensional (3D) hall sensor. The apparatus includes a shift lever having one end connected to a magnet and shifting gears by moving the shift lever and a shift lever body connected to the shift lever and allows the shift lever to move around shift axis or select axis. A sensor unit is mounted fixedly intersecting the shift axis and select axis within the shift lever body and senses the movement of the magnet around an X-axis, a Y-axis and a Z-axis as the magnet moves. The sensor unit is mounted at a tilted angle to provide at least two of three output signals with linearity.