Magnetic Field Camera 3D Distribution via Fourier Transform
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Solution Overview
Problem
Existing magnetic field camera devices can only measure the out-of-plane component of a magnetic field along a predetermined two-dimensional surface, lacking the ability to efficiently determine this component in a three-dimensional volume, which is essential for accurate quality inspection of permanent magnets.
Innovation Solution
A method and device that determine magnetic vector field distribution by manipulating first distribution data from a magnetic field camera to obtain second distribution data on a parallel surface, using intrinsic physical properties such as Fourier transformations and exponential functions to account for spatial frequencies and distances, allowing for precise measurement of magnetic field components in 3D without the need for measuring at different distances from the magnetic source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If magnetic field camera devices measure the out-of-plane component along a predetermined two-dimensional surface, then the measurement can be performed with existing sensor technology, but the ability to determine magnetic field components in a three-dimensional volume is lost
Solution Approach 1:
The patent creates a virtual copy of the magnetic field distribution at a second distance by manipulating the measured data at the first distance. Instead of physically measuring at multiple distances, the system uses mathematical transformations (Fourier transforms) to generate a synthetic representation of the magnetic field at different z-positions, thereby achieving 3D measurement capability without additional physical sensors or complex multi-distance measurement systems.
Solution Approach 2:
The patent transitions from two-dimensional surface measurement to three-dimensional volume analysis by adding the z-dimension (distance from the magnet surface) through mathematical processing. The system takes 2D magnetic field data and uses Fourier transform methods to reconstruct the field distribution at multiple z-levels, effectively adding a spatial dimension without requiring physical movement or additional sensing layers.
2Measurement precision
If measurements are taken at different distances from the magnetic source to obtain 3D data, then complete magnetic field distribution can be determined, but signal-to-noise ratio loss occurs and measurement time increases
Solution Approach 1:
The patent performs preliminary mathematical processing (Fourier transforms) on the measured magnetic field data to pre-calculate the field distribution at different distances. By preparing and manipulating the frequency spectrum data in advance, the system can quickly reconstruct the 3D magnetic field distribution without requiring time-consuming physical measurements at multiple distances, thus reducing total measurement time while maintaining precision.
3Measurement precision
If more sensitive sensors are used to measure magnetic field components at short distances, then measurement accuracy improves, but device cost and complexity increase
Solution Approach 1:
The patent uses mathematical copying and transformation of the magnetic field data rather than relying on highly sensitive physical sensors. By using Fourier transform methods to reconstruct the field distribution, the system can achieve accurate measurements at short distances using standard, less sensitive sensors, thereby reducing device complexity and cost while maintaining measurement precision.
Data Source
AI summary
A method and device for determining values of a magnetic field component of a magnetic vector field.A method for determining values of a magnetic field component of a magnetic vector field, comprising:determining first distribution data comprising values of the magnetic field component, for a first predetermined area defined along a predetermined surface;determining second distribution data comprising second values of the component of the magnetic field for a second predetermined area defined along a second predetermined surface, wherein the first and the second predetermined surfaces are parallel;wherein determining second distribution data comprises manipulation of the first distribution data based on making use of intrinsic physical properties of the magnetic field; and associated device.