Rotation Detection Using Comparator Transition Edges
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Solution Overview
Problem
High-resolution analog-to-digital converters increase the complexity of rotation detection by generating large amounts of digital value data, making it difficult to determine the trend of change and resulting in a complex rotation detection process and larger program size.
Innovation Solution
A rotation detection device that uses a comparator to generate a digital signal indicating the magnitude relationship between the potentiometer output voltage and a threshold voltage, allowing the controller to detect complete turns based on transition edges of the digital signal, simplifying the detection process and reducing program size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of the analog-to-digital converter is increased to improve rotation detection accuracy, then the measurement precision is improved, but the device complexity and program size increase due to the large amount of digital value data that must be processed
Solution Approach 1:
The invention extracts only the essential information needed for rotation detection by using a comparator to generate a digital signal that indicates only the magnitude relationship between the potentiometer output voltage and threshold voltage. This extracts the critical transition edge information while discarding unnecessary detailed voltage data, thereby reducing program size while maintaining detection accuracy.
Solution Approach 2:
The invention changes the parameter representation from high-resolution digital voltage values to a simplified digital signal with transition edges. By transforming the data format from continuous voltage measurements to discrete transition events, the system reduces computational complexity and program size while preserving the ability to detect complete turns accurately.
2Measurement precision
If the resolution of the analog-to-digital converter is increased to improve rotation detection accuracy, then the measurement precision is improved, but the device complexity increases due to the complex process of determining the trend of change in digital values
Solution Approach 1:
The invention extracts only the essential information needed for rotation detection by using a comparator to generate a digital signal that indicates only the magnitude relationship between the potentiometer output voltage and threshold voltage. This extracts the critical transition edge information while discarding unnecessary detailed voltage data, thereby reducing program size while maintaining detection accuracy.
Solution Approach 2:
The invention changes the parameter representation from high-resolution digital voltage values to a simplified digital signal with transition edges. By transforming the data format from continuous voltage measurements to discrete transition events, the system reduces computational complexity and program size while preserving the ability to detect complete turns accurately.
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 provides a simple method for detecting the number of complete turns of a rotating body, reducing the size of the rotation detection program and maintaining accuracy even with increased converter resolution.
Implementation Method 1
a comparator configured to generate a digital signal that indicates a magnitude relationship between a voltage, which is output from a potentiometer in accordance with an amount of rotation of a rotating body, and a threshold voltage
Data Source
AI summary
A rotation detection device includes: a comparator configured to generate a digital signal that indicates a magnitude relationship between a voltage, which is output from a potentiometer in accordance with an amount of rotation of a rotating body, and a threshold voltage; and a controller configured to detect a number of complete turns of the rotating body based on transition edges of the digital signal. By this means, the number of complete turns of the rotating body can be detected through a simple process, so that the size of the rotation detection program can be reduced.