Permanent Magnet Gap Layout for Homogeneous Magnetic Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current magnetic measurement devices using permanent magnets face challenges in achieving stable and uniform magnetic fields, leading to non-homogeneous fields, increased weight, size, and cost, which limits mobility and practicality in both hospital and industrial settings.
Innovation Solution
A magnetic field device comprising multiple permanent magnets and ferromagnetic elements, with a third magnet positioned between the first and second ferromagnetic elements to create a gap, allowing for translation and alignment to enhance magnetic field homogeneity and stability, and an outer shell to confine the magnetic field, reducing weight and size while maintaining strong magnetic field strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If permanent magnets are used to create magnetic fields for measurement, then current application is eliminated, but magnetic field homogeneity deteriorates
Solution Approach 1:
The patent divides the magnetic field generation system into multiple permanent magnets arranged in a specific configuration, with each magnet contributing to the overall field. This segmentation allows the system to maintain strong fields while improving homogeneity through geometric arrangement rather than requiring current application.
Solution Approach 2:
The patent employs ferromagnetic elements positioned adjacent to the permanent magnets to locally enhance and shape the magnetic field. These elements create regions of concentrated flux that improve overall field homogeneity in the measurement zone without requiring active current control.
2Manufacturing precision
If additional elements or larger permanent magnets are added to improve magnetic field homogeneity, then measurement quality improves, but device weight increases
Solution Approach 1:
The patent combines permanent magnets with ferromagnetic elements to create a composite magnetic system. This composite structure achieves superior field homogeneity through the synergistic interaction between the permanent magnets and ferromagnetic materials, rather than simply increasing the size or number of magnets alone.
Solution Approach 2:
The ferromagnetic elements act as intermediaries between the permanent magnets and the measurement zone. These intermediaries shape and distribute the magnetic flux, improving field homogeneity without requiring direct increases in magnet size or number.
3Manufacturing precision
If device size is increased to improve magnetic field strength and homogeneity, then measurement quality improves, but mobility deteriorates
Solution Approach 1:
The patent optimizes the parameters of the permanent magnets and ferromagnetic elements to achieve high field strength and homogeneity in a compact configuration. By carefully selecting magnet dimensions, spacing, and material properties, the system achieves measurement-quality fields without requiring large physical dimensions.
Solution Approach 2:
The patent arranges permanent magnets and ferromagnetic elements in a three-dimensional configuration that maximizes field homogeneity within a compact footprint. This spatial optimization allows the device to achieve high measurement quality while maintaining a smaller overall size for improved mobility.
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
The solution achieves a substantially homogeneous and uniform magnetic field within the measurement volume, reducing the weight and size of the device by up to 20% while increasing magnetic field strength by 30%, and minimizing external fringe fields, thus enhancing mobility and practicality.
Implementation Method 1
Some systems can utilize permanent magnets to create the magnetic fields, which typically do not require application of a current
Implementation Method 2
a first ferromagnetic element positioned adjacent to the first magnet, a second ferromagnetic element positioned adjacent to the second magnet
Data Source
AI summary
A magnetic field device, with a first magnet, a first ferromagnetic element positioned adjacent to the first magnet, a second magnet, a second ferromagnetic element positioned adjacent to the second magnet and relative to the first ferromagnetic element to create a gap between the first ferromagnetic element and the second ferromagnetic element, and a third magnet positioned between the first ferromagnetic element and the second ferromagnetic element and within the gap.