Angle Sensor Device Asymmetric Magnetic Encoding
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Solution Overview
Problem
Current magnetic transducer technologies for torque and position measurement are inefficient in providing accurate and reliable angular position and speed information, particularly in non-contacting measurements, and lack flexibility in generating desired magnetic field signal patterns.
Innovation Solution
An angle sensor device with magnetically encoded regions and a magnetic field detector system that determines angular position and speed information, featuring asymmetric geometric and magnetic strength arrangements along the object's circumference, allowing for flexible magnetization patterns and simultaneous detection of multiple parameters like torque and velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional magnetic transducer technology is used for non-contacting torque and position measurement, then the measurement can be performed without contact, but the accuracy and reliability of angular position and speed information is insufficient
Solution Approach 1:
The magnetic field detector is divided into multiple independent detectors arranged around the movable object. Each detector independently measures magnetic field components, and their results are combined to achieve high-precision angular position and speed measurement. This segmentation allows redundancy and improves both accuracy and reliability.
Solution Approach 2:
The magnetic field detectors serve multiple functions: they detect both angular position and angular speed information simultaneously, and can also measure torque through the magnetically encoded region. This multi-functionality improves measurement reliability by cross-validating parameters from the same sensor system.
2Adaptability or versatility
If symmetric magnetic encoding is used on the movable object, then the manufacturing is simpler, but the flexibility in generating desired magnetic field signal patterns is limited
Solution Approach 1:
The patent employs asymmetric magnetic encoding where the magnetically encoded region has non-uniform magnetic strength distribution around the circumference of the movable object. This asymmetry enables flexible generation of desired magnetic field signal patterns for different measurement requirements, while the encoding can still be applied using standard magnetization techniques.
Solution Approach 2:
Different regions of the movable object are magnetized with different magnetic strengths and orientations according to specific requirements. The magnetically encoded region has locally optimized magnetic properties that vary around the circumference, providing adaptability for various measurement scenarios without requiring complete redesign of the manufacturing process.
3Adaptability or versatility
If multiple parameters are measured simultaneously using separate sensor systems, then each parameter can be optimized for its specific measurement, but the device complexity and cost increase
Solution Approach 1:
The magnetic field detector system is designed to simultaneously measure multiple parameters including angular position, angular speed, and torque. By using the same magnetically encoded region and detector arrangement for multiple measurements, the system achieves multi-parameter capability without proportionally increasing complexity, as all parameters are derived from the same fundamental magnetic field interactions.
Solution Approach 2:
The patent combines position and speed measurement functions into a single integrated magnetic field detection system. The same detectors that measure angular position also detect changes over time to determine angular speed, eliminating the need for separate sensor systems and reducing overall device complexity while maintaining versatility.
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
Enables accurate and efficient determination of angular position and speed with enhanced reliability and flexibility in magnetic field signal generation, suitable for applications in mining, drilling, and engine monitoring, while reducing costs and complexity.
Implementation Method 1
when the shaft is rotated or reciprocated, such a magnetic encoded region generates a characteristic signal in a magnetic field detector (like a magnetic coil)
Implementation Method 2
at least one magnetic field detector, wherein the at least one magnetic field detector is adapted to detect a signal generated by the at least one magnetically encoded region
Data Source
AI summary
An angle sensor device is for determining information of a movable object. The information includes angular position information and/or angular speed information. The angle sensor device includes (a) at least one magnetically encoded region arranged on the movable object, (b) at least one magnetic field detector, and (c) a unit. The at least one magnetic field detector is adapted to detect a signal generated by the at least one magnetically encoded region when the at least one magnetically encoded region moving with the movable object passes a surrounding area of the at least one magnetic field detector. The unit is adapted to determine the information based on the detected signal.