Magnetic Field Camera Array for Automated Magnet Surface Scanning
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Solution Overview
Problem
Current magnetic measurement techniques are inadequate for quickly and accurately assessing the quality of permanent magnets, particularly in large-scale magnetic systems, as they are either too slow, limited in scope, or not compatible with automated production processes.
Innovation Solution
A device comprising multiple magnetic field camera modules arranged in a fixed position with a means for relative movement to scan the magnetic field distribution across a main surface, allowing for efficient and automated measurement of magnetic field distributions on surfaces larger than a single camera module's detection area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single magnetic field camera module is used, then the device complexity is low, but the measurement area is limited and cannot cover large magnet surfaces
Solution Approach 1:
The measurement system is divided into multiple independent magnetic field camera modules, each capable of measuring a portion of the magnet surface. These modules are arranged in a fixed relative position to form an arrangement that collectively covers a larger measurement area while maintaining manageable complexity through modular design.
2Area of stationary object
If multiple magnetic field camera modules are arranged to cover larger areas, then the measurement area increases, but the device complexity increases
Solution Approach 1:
Multiple magnetic field camera modules are merged into a coordinated arrangement with fixed relative positions. The modules work together as an integrated system to measure large magnet surfaces, combining their individual measurement capabilities while maintaining a structured configuration that manages complexity.
3Productivity
If classical magnetic measurement techniques are used, then the device complexity is low, but the measurement speed is too slow for automated production
Solution Approach 1:
The patent replaces classical mechanical magnetic measurement techniques with a digital magnetic field camera-based system. This substitution enables faster, automated digital measurement of magnetic field distributions, significantly improving measurement speed and productivity while accommodating automated production requirements.
4Adaptability or versatility
If a single magnetic field camera module is used, then the device complexity is low, but it cannot provide comprehensive magnet quality inspection
Solution Approach 1:
The arrangement of multiple magnetic field camera modules provides universal inspection capability that can measure various magnet parameters including remanence magnetization vector, angular deviation, magnet homogeneity, material defects, and magnetization deviations. This multi-functional system handles diverse inspection requirements within a single integrated setup.
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 quick and automated determination of magnetic field distributions on large surfaces, enhancing the speed and accuracy of magnet quality inspection, suitable for inline quality control in electric drive production.
Implementation Method 1
each magnetic field camera module being adapted for measuring a magnetic field distribution to which it is exposed by means of a respective detection surface
Data Source
AI summary
Embodiments described herein relate to devices and methods for determining a magnetic field distribution of a magnet along a main surface of said magnet. An example device for determining a magnetic field distribution of a magnet along a main surface of said magnet includes an arrangement of at least two independent magnetic field camera modules being arranged in a fixed relative position with respect to each other, each magnetic field camera module being adapted for measuring a magnetic field distribution to which it is exposed by means of a respective detection surface. The device also includes a means for providing a predetermined relative movement between the main surface and the arrangement to thereby scan the magnetic field distribution of the magnet along the main surface.