Magnetic Field Detection With Paired Soft Magnetic Shields
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Solution Overview
Problem
Existing magnetic field detection devices face challenges in achieving optimal performance, particularly in shielding unwanted magnetic field components while enhancing detection sensitivity for targeted components.
Innovation Solution
A magnetic field detection device comprising a pair of soft magnetic layers disposed in a specific orientation with a magnetic detector between them, configured to shield unwanted magnetic field components and enhance detection sensitivity for targeted components using soft magnetic bodies as magnetic yokes and shields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional magnetic field detection devices are used, then basic detection function is provided, but detection performance is insufficient and unwanted magnetic field components cannot be effectively shielded
Solution Approach 1:
Soft magnetic bodies are introduced as intermediary elements between the magnetic detector and external magnetic fields. These soft magnetic bodies act as magnetic shields that selectively block unwanted magnetic field components while allowing targeted components to reach the detector, thereby improving detection precision without being directly part of the detection mechanism itself
Solution Approach 2:
The patent utilizes the magnetic properties of soft magnetic materials to convert potentially harmful external magnetic field interference into beneficial shielding effects. By strategically positioning soft magnetic bodies, unwanted magnetic field components are redirected or blocked, transforming what would be interference into a protective function that enhances detection accuracy
2Object-affected harmful factors
If soft magnetic bodies are added to shield magnetic fields, then unwanted components are blocked, but device structure becomes more complex
Solution Approach 1:
Instead of providing uniform shielding in all directions, the patent applies soft magnetic bodies only in specific locations and orientations where unwanted magnetic field components are most problematic. This localized approach to shielding maintains device simplicity while providing targeted protection against magnetic interference
Solution Approach 2:
The shielding function is divided into multiple soft magnetic body elements arranged in specific patterns rather than using a single complex shielding structure. This segmentation allows for simpler manufacturing and assembly while achieving effective magnetic field blocking through the collective action of individual magnetic bodies
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 device achieves high performance in magnetic field detection by effectively shielding unwanted components and enhancing sensitivity for targeted components, with improved critical magnetic field strength and reduced detection errors.
Implementation Method 1
The first soft magnetic body and the second soft magnetic body extend along a first plane and are disposed in confronted relation in a third direction... configured to shield unwanted magnetic field components and enhance detection sensitivity
Implementation Method 2
a magnetic detector provided between the first soft magnetic body and the second soft magnetic body in the third direction
Data Source
AI summary
Provided is a magnetic field detection device that includes a first and second soft magnetic bodies, and a magnetic detector. The first and second soft magnetic bodies extend along a first plane and are disposed in confronted relation in a third direction. The first plane includes both a first direction and a second direction orthogonal to the first direction. The third direction is orthogonal to both the first and second directions. The magnetic detector is provided between the first and second soft magnetic bodies in the third direction.