Inflatable Electromagnetic Stirrer for Compact Chamber Testing
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Solution Overview
Problem
Conventional electromagnetic stirrers are bulky, heavy, difficult to transport, and require specific handling due to their fixed dimensions and fragility, making them unsuitable for large volume reverberation chambers and limiting their adaptability and efficiency in generating a homogeneous electromagnetic field.
Innovation Solution
An inflatable electromagnetic stirrer with interchangeable, C-shaped vanes and a cylindrical mast, featuring a removable attachment system and a turntable for rotation, allowing for easy assembly, disassembly, and storage, and capable of generating a homogeneous and isotropic electromagnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional electromagnetic stirrer with fixed metal vanes is used, then the electromagnetic field can be generated, but the stirrer becomes bulky, heavy, and difficult to transport
Solution Approach 1:
The patent applies pneumatic principles by using an inflatable structure for the stirrer. The stirrer comprises an inflatable body that can be inflated to assume an operative configuration for generating electromagnetic fields, and deflated to assume a stowed configuration for easy transport and storage. This pneumatic approach replaces traditional heavy metal construction with a lightweight inflatable structure that maintains the necessary form factor for electromagnetic field generation when inflated.
Solution Approach 2:
The patent implements dynamics by making the stirrer structure changeable between two states: an inflated operative state for use and a deflated stowed state for transport. The inflatable body allows the stirrer to dynamically adjust its physical presence, transitioning from a compact, lightweight form during storage to a full-sized, functional form during operation, thereby resolving the contradiction between portability and functionality.
2Reliability
If a conventional electromagnetic stirrer with fixed dimensions is used, then the electromagnetic field can be generated, but the stirrer requires large storage space and is difficult to dismantle
Solution Approach 1:
The inflatable body provides a pneumatic solution that allows the stirrer to occupy minimal storage volume when deflated while maintaining full operational dimensions when inflated. This dramatically reduces the storage space requirement from a large fixed-volume structure to a compact deflated state that can be easily stored or transported.
Solution Approach 2:
The stirrer is segmented into modular components including the inflatable body, reflective surfaces, and attachment mechanisms. This segmentation allows the stirrer to be disassembled into manageable parts when not in use, with the inflatable body serving as the central component that can be independently stored or transported, thereby reducing overall storage volume and facilitating easy dismantling.
3Reliability
If a conventional electromagnetic stirrer with fixed shape is used, then the electromagnetic field can be generated, but the stirrer is only suitable for a given chamber and lacks adaptability
Solution Approach 1:
The inflatable body provides dynamic adaptability, allowing the stirrer to be inflated to different sizes or configurations depending on the chamber dimensions and test requirements. This dynamic adjustability enables the same stirrer to adapt to various chamber sizes and geometries, replacing the need for chamber-specific fixed-dimension stirrers.
Solution Approach 2:
The stirrer design achieves universality by combining the inflatable body with interchangeable reflective surfaces and configurable vanes. This multi-functional design allows a single stirrer unit to serve multiple chambers and applications by adjusting the inflatable body configuration and swapping reflective components, thereby eliminating the need for multiple chamber-specific stirrers.
4Reliability
If a conventional electromagnetic stirrer with sharp metal edges is used, then the electromagnetic field can be generated, but specific means and skills are required to handle and repair it
Solution Approach 1:
The inflatable body serves as a flexible shell that replaces sharp metal edges with smooth, rounded surfaces. This flexible construction eliminates cutting hazards and sharp corners inherent in traditional metal stirrers, making the device safer to handle and reducing the need for specialized handling procedures or protective equipment.
Solution Approach 2:
The pneumatic construction using an inflatable body replaces fragile metal components with a resilient, damage-resistant structure. This pneumatic design reduces the stirrer's susceptibility to damage from drops or impacts, and any damage can be addressed by simple deflation and repair of the inflatable membrane rather than complex metal fabrication or welding repairs.
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 inflatable stirrer enables efficient and adaptable electromagnetic field measurements in reverberation chambers of various sizes, reducing storage space, handling risks, and costs, while ensuring a robust and efficient generation of a homogeneous field across all polarizations.
Implementation Method 1
at least one vane presenting a surface reflecting radio and/or microwave waves
Implementation Method 2
at least a part of the mast and/or of the or each vane is inflatable
Data Source
AI summary
An electromagnetic stirrer includes a mast; and at least one vane presenting a surface reflecting radio and/or microwave waves, the at least one vane presenting at least two non-coplanar regions. The mast presents a vane attachment zone, and the at least one vane is attached to the vane attachment zone. At least a part of the mast and/or of the at least one vane is inflatable.