Rotator Sensor Control Using Adaptive Switching Levels for Run-Out
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Solution Overview
Problem
Conventional rotator detection sensors face operational issues with stability and precision when dealing with rotators that have run-out, as a single reference value can lead to decreased signal stability or precision due to unstable magnetic flux density.
Innovation Solution
A method and device that recognize patterns in magnetic flux density to set multiple switching levels corresponding to the number of protrusions on the rotator, allowing for accurate sensor signal generation and adaptive True Power On (TPO) level adjustment, while compensating for temperature-induced changes in magnetic flux density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single reference value is used for the rotator detection sensor, then the device complexity is reduced, but the measurement precision deteriorates due to unstable magnetic flux density caused by rotator run-out
Solution Approach 1:
The patent divides the single reference value into multiple switching levels (first switching level, second switching level, etc.) that correspond to different protrusions of the rotator. Each switching level is set at a specific percentage point of the magnetic flux density pattern, allowing precise detection of individual protrusions while maintaining manageable system complexity through systematic segmentation.
Solution Approach 2:
The patent changes the reference value parameter from a single fixed value to multiple dynamic switching levels. These levels are determined based on the magnetic flux density pattern and can be adjusted according to the number of protrusions detected, enabling the system to adapt to run-out conditions while maintaining high measurement precision.
2Stability of the object's composition
If a high reference value is set to improve signal stability, then the stability of the sensor signal is improved, but the measurement precision deteriorates
Solution Approach 1:
The patent applies different switching levels for different regions of the magnetic flux density pattern. Each switching level is locally optimized for its corresponding protrusion detection region, allowing the system to maintain high precision for each individual protrusion while ensuring overall signal stability through the coordinated use of multiple levels.
3Measurement precision
If a low reference value is set to improve signal precision, then the precision of the sensor signal is improved, but the stability deteriorates
Solution Approach 1:
The patent implements a dynamic reference value system where multiple switching levels are used instead of a static single reference value. The system dynamically selects appropriate switching levels based on the detected magnetic flux density pattern and the number of protrusions, enabling both high precision and stability under varying operational conditions including temperature changes.
4Measurement precision
If multiple switching levels are set based on magnetic flux density patterns, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The pattern recognition unit automatically recognizes the magnetic flux density pattern and determines the appropriate number of switching levels based on the detected number of protrusions. This self-service mechanism eliminates the need for manual configuration of multiple switching levels, reducing operational complexity while maintaining high measurement precision through adaptive pattern-based control.
5Device complexity
If the sensor operates without temperature compensation, then the device complexity is reduced, but the reliability deteriorates under temperature changes
Solution Approach 1:
The patent incorporates a temperature compensation unit that uses feedback from temperature sensors to adjust the switching levels and magnetic flux density patterns. This feedback mechanism ensures that the sensor maintains reliable performance under temperature changes by continuously adapting the reference values to compensate for thermal effects on the magnetic field and sensor characteristics.
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 enhances the precision and stability of rotator detection, improving the sensor's ability to accurately detect rotator protrusions and maintain performance even during changes in temperature, thereby reducing production costs and improving start-up precision.
Implementation Method 1
a conventional rotator detection sensor is implemented based on the Hall effect or the Magneto-Resistive (MR) effect
Implementation Method 2
a conventional rotator detection sensor is implemented based on the Hall effect or the Magneto-Resistive (MR) effect
Data Source
AI summary
A device and method for controlling a rotator detection sensor for a rotator having run-out is provided. The method for controlling a rotator detection sensor for a rotator having run-out includes recognizing, by a pattern recognition unit, a pattern having peaks based on a magnetic flux density of the rotator measured for a preset time interval, recognizing, by the pattern recognition unit, the number of protrusions of the rotator based on the pattern having the peaks of the magnetic flux density, and setting, by a switching level setting unit, switching levels for the magnetic flux density based on the number of the protrusions. The magnetic flux density has a plurality of peaks that correspond to the number of protrusions of the rotator. The switching levels for the magnetic flux density are each set at a point that corresponds to a preset percentage at each of the peaks.