Distributed Demagnetizing Coil System for Uniform Shielding
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Solution Overview
Problem
Existing demagnetizing coil systems in shielding devices often produce uneven demagnetizing magnetic fields, leading to inconsistent demagnetization of shielding materials and difficulties in achieving a uniform, zero magnetic field environment, which is crucial for advanced scientific research and engineering applications.
Innovation Solution
A distributed demagnetizing coil system with multiple turns of coils evenly wound on shielding surfaces, forming closed magnetic flux loops, and a power supply module with a controller to generate and control demagnetizing currents, ensuring uniform demagnetization across the shielding device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional demagnetizing coil systems are used, then the shielding device can provide some demagnetization capability, but the demagnetizing magnetic field is uneven and the demagnetization effect is poor
Solution Approach 1:
The demagnetizing coil system is divided into multiple independent coil units distributed across different surfaces of the shielding device. Each coil unit can generate localized demagnetizing magnetic fields, and collectively they cover the entire shielding structure to achieve uniform demagnetization throughout.
Solution Approach 2:
Different coil units are positioned on different surfaces (inner surface, outer surface, side surfaces) of the shielding device to provide locally optimized demagnetizing fields. This ensures that each region of the shielding material receives appropriate demagnetizing treatment tailored to its specific location and magnetic field conditions.
2Object-affected harmful factors
If shielding materials with high magnetic permeability are used, then external magnetic fields can be effectively shielded, but the materials become magnetized and produce residual static magnetic fields
Solution Approach 1:
The patent utilizes the same high-permeability shielding materials that cause magnetization problems and converts this harmful effect into a beneficial one by applying demagnetizing magnetic fields through the coil system. The magnetized materials become the target of controlled demagnetization, transforming the residual magnetic field problem into a solvable engineering challenge.
Solution Approach 2:
The demagnetizing coil system applies preliminary demagnetizing treatment to the shielding materials before they are put into service. By pre-demagnetizing the high-permeability materials, the system prevents the accumulation of residual static magnetic fields that would otherwise interfere with sensitive measurements or operations inside the shielding device.
3Manufacturing precision
If multiple demagnetizing coils are distributed on shielding surfaces, then uniform demagnetizing magnetic fields can be achieved, but the system complexity increases
Solution Approach 1:
The distributed coil units serve multiple functions: they generate demagnetizing magnetic fields, provide spatial distribution for uniform coverage, and can potentially be controlled independently for different demagnetization scenarios. This multi-functionality justifies the increased system complexity by delivering superior demagnetization performance.
Solution Approach 2:
The patent transitions from a single-dimension or two-dimension coil arrangement to a three-dimensional distributed coil system that wraps around the shielding device in multiple directions (inner surface, outer surface, side surfaces). This spatial distribution in three dimensions enables uniform demagnetizing field coverage that cannot be achieved with simpler coil configurations.
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 system achieves highly uniform demagnetizing magnetic fields, effectively demagnetizing soft magnetic materials throughout the shielding device, significantly improving the demagnetization effect and reducing residual static magnetic fields to very low levels, thus meeting the stringent requirements of modern research and engineering.
Implementation Method 1
the plurality of turns of demagnetizing coils are evenly wound on each shielding surface of a shielding body in a shielding device at intervals, one half of each turn of demagnetizing coil is located on the inner side of the wound shielding body and the other half of each turn of demagnetizing coil is located on the outer side of the wound shielding body for providing corresponding demagnetizing magnetic fields to form a closed magnetic flux loop
Data Source
AI summary
A distributed demagnetizing coil system, a shielding device, and a demagnetizing method. The system includes turns of demagnetizing coils evenly wound on each shielding surface of a shielding body in the shielding device at intervals and connecting wires provided on outer side of the shielding surface in an inflection manner. One half of each turn is located on inner side of the wound shielding body and the other half of each turn s located on outer side of the wound shielding body for providing corresponding demagnetizing magnetic fields to form a closed magnetic flux loop. One half of each connecting wire is connected to the corresponding demagnetizing coil, the other half of each connecting wire is reversely inflected along an original path and is connected to a power supply module, so that corresponding demagnetizing current is introduced into each demagnetizing coil connected to the connecting wire.