Dual Magnetic Sensor Position Calculation Without Conversion Tables
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing position calculation devices for magnets require a conversion table specific to each product type due to varying magnet installation positions, making them inefficient for universal application.
Innovation Solution
A position calculation device using two magnetic sensors and a calculation circuit to determine the magnet's position based on the ratios of magnetic flux density components and a predetermined distance, allowing for accurate calculation regardless of product type or installation position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conversion table specific to each product type is used to calculate magnet position, then measurement precision is improved, but device complexity and productivity deteriorate due to requiring multiple conversion tables
Solution Approach 1:
The patent creates a universal calculation formula that can determine magnet position for all product types without requiring separate conversion tables. The formula uses the ratio of magnetic flux density components detected by two sensors, making the system adaptable to different magnet installation positions and product configurations while maintaining calculation accuracy.
Solution Approach 2:
The patent changes the calculation approach from using absolute magnetic flux density values requiring product-specific conversion tables to using the ratio of magnetic flux density components. This parameter transformation eliminates the need for product-specific calibration data while preserving measurement precision across different product types.
2Measurement precision
If product-specific conversion tables are required for each magnet installation position, then measurement precision is improved, but productivity and ease of operation worsen due to increased setup time and complexity
Solution Approach 1:
The calculation formula is designed to be universally applicable across different product types and magnet installation positions. By using the ratio of magnetic flux density components from two sensors arranged at a predetermined distance, the system achieves accurate position calculation without requiring product-specific conversion tables, thereby improving productivity and ease of operation.
3Measurement precision
If multiple conversion tables are maintained for different product types, then measurement precision is improved, but ease of repair and device complexity worsen
Solution Approach 1:
The patent extracts the essential information needed for position calculation by using only the ratio of magnetic flux density components from two sensors. This extraction approach eliminates the need to store and manage multiple product-specific conversion tables, simplifying maintenance and repair operations while maintaining calculation accuracy.
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
Enables accurate and universal calculation of magnet position, improving efficiency and adaptability across different product types and individual installations.
Implementation Method 1
detect a magnetic flux density of a magnetic field generated by the magnet
Data Source
AI summary
A position calculation device calculates a position of a magnet installed on a moving body that is capable of moving relatively in a first direction. The position calculation device includes a first magnetic sensor and a second magnetic sensor arranged apart from each other by a predetermined distance in the first direction, and a calculation circuit that calculates the position of the magnet, using a first ratio between a first component in the first direction and a second component in a second direction, of a first magnetic flux density detected by the first magnetic sensor, a second ratio between a third component in the first direction and a fourth component in the second direction, of a second magnetic flux density detected by the second magnetic sensor, and the predetermined distance.