Magnetic Sensing Metering Device Rotation Precision
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Solution Overview
Problem
Existing rotation sensing devices face challenges in accurately measuring the consumption of resources like gas, electricity, and water due to limitations in detecting the rotation of rotatable elements, which affects the precision of consumption tracking.
Innovation Solution
A rotation sensing device that utilizes a magnet, a magnetic field sensor, and a flux conductor mounted to a rotatable element, where the magnetic field sensor generates a signal based on the sensed magnetic field strength as the flux conductor rotates, enhancing or diverting the magnetic flux path to detect changes in rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional rotation sensing methods are used, then the device structure is simple, but the measurement precision of rotation is insufficient
Solution Approach 1:
A flux conductor is introduced as an intermediary component between the magnet and the magnetic field sensor. The flux conductor modulates the magnetic flux path based on the rotation angle, enabling the sensor to detect rotation through magnetic field strength changes rather than direct position sensing, thereby improving measurement precision without requiring complex mechanical structures
Solution Approach 2:
The patent replaces traditional mechanical rotation sensing mechanisms (such as contact式 encoders or mechanical linkages) with a magnetic field-based sensing system. The rotation information is transmitted through magnetic flux modulation rather than direct mechanical contact, reducing wear and improving measurement precision while maintaining relatively simple device structure
2Measurement precision
If magnetic field strength varies during rotation, then rotation detection becomes possible, but signal stability deteriorates
Solution Approach 1:
The flux conductor is designed to create periodic modulation of the magnetic flux path as it rotates. This periodic action generates consistent, repeatable signal patterns that can be reliably detected and processed, transforming the variable magnetic field into a stable periodic signal suitable for accurate rotation measurement
Solution Approach 2:
The system exploits changes in magnetic field parameters (strength and distribution) as the flux conductor rotates. By designing the flux conductor geometry and magnetic circuit to produce controlled parameter changes, the system achieves reliable rotation detection through predictable signal variations while maintaining overall signal stability
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 solution enables precise tracking of rotations, allowing for accurate measurement of resource consumption by distinguishing between activated and deactivated states of the magnetic field sensor, thereby improving the precision of consumption tracking in utility meters and similar applications.
Implementation Method 1
generating a magnetic field by a magnet disposed at a fixed location, sensing, by a magnetic field sensor, a magnetic field strength of the generated magnetic field
Implementation Method 2
a flux conductor configured to alter the magnetic field of the magnet
Data Source
AI summary
Methods and systems for implementing a rotation sensing device are provided. The rotation sensing device may include a magnet, a magnetic field sensor located in a fixed position relative to the magnet, the magnetic field sensor configured to sense a magnetic field of the magnet, and a flux conductor configured to alter the magnetic field of the magnet, wherein the flux conductor is mounted to a rotatable element. The magnet may be mounted in a fixed position relative to the flux conductor, and the magnetic field sensor may be configured to generate a signal based on a sensed strength of the magnetic field in accordance with rotation of the flux conductor.