Angle Sensor Homogeneous Test Mode Alignment
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Solution Overview
Problem
Magnetic angle sensors face challenges in achieving accurate angular measurements due to mechanical misalignment between the sensor and the target magnet, which existing methods fail to adequately address, especially as accuracy requirements increase, and current solutions like multi-point calibration are costly and complex.
Innovation Solution
The implementation of an angle sensor capable of operating in a homogeneous test mode, which allows for optimal mechanical alignment by canceling out differential magnetic field components and facilitating near-optimal alignment between the sensor and the target magnet, reducing or eliminating mechanical misalignment without the need for additional error budgets or costly calibration processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multi-point calibration is used to improve measurement precision, then angular measurement accuracy is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and eliminates the need for complex multi-point calibration procedures by implementing a homogeneous test mode that automatically compensates for mechanical misalignment. The system removes the calibration step entirely by using a different operational mode during manufacturing that simplifies the alignment process.
Solution Approach 2:
The patent changes the operational parameters of the angle sensor by introducing a homogeneous test mode with modified switching configurations. This parameter change allows the sensor to operate in a mode that is specifically optimized for alignment detection, transforming the measurement process to eliminate misalignment errors without complex calibration.
2Measurement precision
If mechanical alignment is improved to reduce misalignment, then measurement precision is improved, but manufacturing complexity increases
Solution Approach 1:
The system performs self-alignment by using the angle sensor itself to detect and indicate misalignment conditions. The homogeneous test mode enables the sensor to automatically identify alignment issues and guide the alignment process, eliminating the need for external alignment tools or complex procedures.
Solution Approach 2:
The patent implements preliminary alignment action by using the homogeneous test mode during the manufacturing process before final assembly. This allows misalignment to be detected and corrected early in the manufacturing流程, preventing the need for post-assembly calibration or adjustment.
3Measurement precision
If accuracy requirements are increased, then measurement precision is improved, but device complexity must increase to meet the requirements
Solution Approach 1:
The angle sensor is designed with multi-functionality, capable of operating in both homogeneous test mode and differential measurement mode. This universal design allows the same hardware to achieve high precision measurements without requiring additional specialized components or systems.
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 approach effectively reduces or eliminates mechanical misalignment, enhancing the accuracy of angular measurements without increasing manufacturing costs or complexity, thereby meeting stringent accuracy requirements.
Implementation Method 1
A magnetic angle sensor may sense a magnetic field produced or distorted by a rotating magnet wheel
Data Source
AI summary
An alignment device may obtain a set of analog-to-digital converter (ADC) signals provided by an angle sensor operating in a homogeneous test mode. The set of ADC signals may be associated with a rotation of a target magnet relative to the angle sensor. The alignment device may identify a maximum ADC signal value based on the set of ADC signals. The alignment device may selectively position, by the alignment device, at least one of the angle sensor or the target magnet based on the maximum ADC signal value.