Side-Shafted Magnetic Angular Sensor for Flexible Mounting
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Solution Overview
Problem
Existing magnetic angular sensing systems are inflexible and cannot effectively detect the angular position of a magnetized cylinder or ring magnet when the magnetic sensor cannot be placed at the center or in the plane of the magnet, particularly in applications where the magnet is rotatable and the sensor needs to be mounted side-shafted.
Innovation Solution
A magnetic angular sensing system with a sensor placed side-shafted to the magnet, configured to detect both the axial and tangential magnetic field components of the magnetic field vector, allowing for the determination of the angular position by matching the angle orientation of the magnetic field vector, using Hall effect devices and processing units to generate an angle signal indicative of the angular position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the magnetic sensor is placed at the center or in the plane of the magnet, then the angular position detection is straightforward, but the system cannot be adapted to applications where the sensor must be mounted side-shafted
Solution Approach 1:
The patent extends the sensing capability from the traditional planar configuration (sensor in the plane of the magnet) to a three-dimensional side-shafted configuration. By detecting both axial and tangential magnetic field components, the system operates in multiple spatial dimensions, enabling flexible mounting positions without compromising measurement capability.
Solution Approach 2:
The sensing system is designed to perform multiple functions: it can detect angular position regardless of whether the sensor is mounted in the plane of the magnet or side-shafted to it. The dual-component detection scheme (axial and tangential) makes the system universally applicable to various mounting configurations and magnet geometries.
2Adaptability or versatility
If the sensor is mounted side-shafted to detect angular position, then adaptability to various applications is improved, but the detection of magnetic field components becomes more complex
Solution Approach 1:
The magnetic field detection is segmented into two independent components: axial magnetic field component (parallel to the rotation axis) and tangential magnetic field component (perpendicular to both the radius and axis). This segmentation simplifies the measurement process by breaking down the complex three-dimensional field into manageable orthogonal components that can be detected separately and processed independently.
Solution Approach 2:
The patent introduces an intermediary coordinate system transformation process that converts the measured axial and tangential field components into angular position information. This intermediary step decouples the complex direct measurement problem from the final angular position output, making the system more manageable and adaptable.
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 provides a flexible and effective method for detecting the angular position of a magnetized radially magnet, enabling accurate determination of the angular position even when the sensor is not placed at the center or in the plane of the magnet, enhancing adaptability in various applications.
Implementation Method 1
using Hall effect devices and processing units to generate an angle signal indicative of the angular position
Data Source
AI summary
A magnetic angular sensing system has a magnet magnetized radially and a magnetic angular sensor for sensing the angular position of the magnet. The magnetic angular sensor is mounted in parallel to the axis of the magnet and is non-coplanar with the magnet. The magnetic angular sensor senses an angular position of the magnet based on a detected axial magnetic field component and a tangential magnetic field component of the magnetic field vector where the sensor mounted. This invention provides a flexible sensing system.