Angle Sensor Noise Error Reduction via Multi-Position Detection
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Solution Overview
Problem
Existing angle sensors face challenges in reducing angular errors caused by noise magnetic fields without introducing structural or installation limitations, as they require specific magnetic field generation units and limited detection unit placements.
Innovation Solution
The angle sensor system employs multiple composite magnetic field information generation units at different detection positions to detect composite magnetic fields, generating information on direction and strength, which is then processed to minimize angular errors caused by noise magnetic fields, without imposing substantial structural or installation constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic field generation unit and detection units are used to reduce angular errors caused by noise magnetic fields, then measurement precision is improved, but device complexity and installation constraints increase
Solution Approach 1:
The patent divides the detection function into multiple independent detection units positioned at different locations. Each detection unit independently detects the magnetic field at its position, and the control unit processes these multiple detection results to calculate the final angle value. This segmentation allows the system to reduce angular errors caused by noise magnetic fields while maintaining design flexibility without requiring a complex integrated magnetic field generation unit.
Solution Approach 2:
The control unit performs multiple functions: it receives detection results from multiple detection units, processes these results to reduce angular errors, and calculates the final angle value. This multi-functional approach eliminates the need for separate magnetic field generation units and specialized detection unit placements, thereby reducing device complexity and installation constraints while improving measurement precision.
2Measurement precision
If multiple detection units at different positions are used to detect composite magnetic fields, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The control unit acts as an intermediary that receives detection results from multiple detection units positioned at different locations. It processes these results to reduce angular errors caused by noise magnetic fields and calculates the final angle value. This intermediary approach allows multiple detection units to work together effectively without requiring complex configuration or integration, thereby improving measurement precision while maintaining simple device architecture.
3Measurement precision
If detection units are placed at specific limited positions to reduce angular errors, then measurement precision is improved, but ease of operation and installation are worsened
Solution Approach 1:
The patent segments the detection function across multiple independent detection units that can be positioned at different locations. Each detection unit independently detects the magnetic field at its position, and the control unit processes these results to reduce angular errors. This segmentation provides installation flexibility while achieving improved measurement precision, as the detection units can be placed at various positions without requiring a specific limited configuration.
Solution Approach 2:
The control unit is designed to handle detection results from multiple detection units at different positions, processing them to reduce angular errors and calculate the final angle value. This universal design allows the system to maintain installation flexibility while achieving improved measurement precision, as the control unit can accommodate various detection unit configurations without requiring specific limited positions.
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 angular errors by utilizing multiple detection positions and processing the composite magnetic field information, resulting in a more accurate detected angle value with reduced noise interference, while maintaining flexibility in system design.
Implementation Method 1
a magnetic detection element configured to detect a composite magnetic field of the magnetic field to be detected and the noise magnetic field
Data Source
AI summary
An angle sensor includes a plurality of composite magnetic field information generation units and an angle computing unit. The plurality of composite magnetic field information generation units detect, at a plurality of detection positions, a composite magnetic field of a magnetic field to be detected and a noise magnetic field other than the magnetic field to be detected, and thereby generate a plurality of pieces of composite magnetic field information including information on the direction of the composite magnetic field. The angle computing unit generates a detected angle value by performing an operation using the plurality of pieces of composite magnetic field information so that an error of the detected angle value caused by the noise magnetic field is made smaller than in the case where the detected angle value is generated on the basis of any and only one of the plurality of pieces of composite magnetic field information.