Soft Magnetic Yoke Structure for Enhanced Field Detection
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Solution Overview
Problem
Existing magnetic field detection devices have limitations in achieving superior magnetic field detection capabilities, particularly in enhancing the detection of external magnetic fields.
Innovation Solution
A magnetic field detection device comprising a pair of soft magnetic layers and a magnetism detection element, where the soft magnetic layers are disposed to face each other with the magnetism detection element in between, enhancing the magnetic field detection capability by acting as a magnetic yoke, and optimizing the aspect ratio and spacing to improve detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional magnetic field detection devices are used, then the device structure is simple, but the magnetic field detection capability is insufficient
Solution Approach 1:
A non-magnetic intermediate layer is introduced between the soft magnetic layer and the magnetism detection element. This intermediate layer prevents direct contact while maintaining magnetic field transmission, thereby improving detection capability by reducing magnetic interference and preventing element degradation, without significantly increasing overall device complexity
Solution Approach 2:
The device employs a composite structure combining soft magnetic material layers with non-magnetic intermediate layers. This composite approach optimizes magnetic field concentration and detection performance by leveraging the complementary properties of different materials, achieving superior detection capability while maintaining reasonable structural complexity
2Measurement precision
If the aspect ratio of soft magnetic layers is increased, then magnetic field detection capability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent systematically varies the aspect ratio parameter of soft magnetic layers to optimize detection capability. By establishing specific aspect ratio ranges and relationships between different layer dimensions, the invention achieves high detection performance while providing clear manufacturing guidelines that balance performance requirements with fabrication feasibility
3Measurement precision
If the spacing between soft magnetic layers is reduced, then magnetic field concentration is improved, but the risk of element damage increases
Solution Approach 1:
A non-magnetic intermediate layer is positioned between the soft magnetic layer and the magnetism detection element to act as a protective mediator. This intermediate layer enables reduced spacing for better magnetic field concentration while preventing direct contact that would cause element damage, thereby simultaneously improving detection capability and ensuring element reliability
Solution Approach 2:
The non-magnetic intermediate layer serves as a pre-established protective barrier that cushions against potential magnetic field-induced damage. By introducing this protective layer before operation, the device can operate at optimized spacing without risking element degradation, thus maintaining both high magnetic field concentration and element durability
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 exhibits a high magnetic field detection capability by enhancing the external magnetic field component, allowing for more effective detection and increased resolution, with favorable results in experimental examples across various aspect ratios.
Implementation Method 1
a magnetism detection element disposed, in the first direction, between the first soft magnetic body and the second soft magnetic body
Implementation Method 2
enhancing the magnetic field detection capability by acting as a magnetic yoke
Data Source
AI summary
A magnetic field detection device includes a first soft magnetic body, a second soft magnetic body, and a magnetism detection element. The first soft magnetic body extends to have a first length in a first direction, and has a first width, smaller than the first length, in a second direction. The second direction is substantially orthogonal to the first direction. The second soft magnetic body is disposed to be spaced apart from and face the first soft magnetic body in the first direction, extends to have a second length in the first direction, and has a second width, smaller than the second length, in the second direction. The magnetism detection element is disposed, in the first direction, between the first and second soft magnetic bodies, and extends to have a third length in the first direction and a third width, larger than the third length, in the second direction.