Viscoelastic Layer Electromagnetic Shield for Vibration and Noise
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Solution Overview
Problem
Existing electromagnetic shields require additional structures for attachment, making them difficult to integrate seamlessly with target members and potentially compromising communication quality due to electromagnetic noise and vibration sensitivity.
Innovation Solution
An electromagnetic shield comprising a metal sheet sandwiched between a first and second viscoelastic layer, allowing easy attachment to various surfaces through the viscoelastic layers' viscosity and elasticity, which also enhances vibration resistance and communication quality by positioning the metal sheet close to the communications device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional attachment structures are provided for the electromagnetic shield, then the shield can be securely attached to the target member, but the device complexity increases and ease of operation decreases
Solution Approach 1:
The patent combines the attachment function with the electromagnetic shield structure itself by providing viscoelastic layers on both surfaces of the metal sheet. This integration eliminates the need for separate attachment structures, thereby reducing device complexity while maintaining secure attachment capability. The viscoelastic layers serve dual purposes: providing electromagnetic shielding and enabling direct attachment to target members.
Solution Approach 2:
The viscoelastic layers perform multiple functions simultaneously: they provide electromagnetic shielding, enable attachment to various surfaces (including curved and uneven ones), and offer vibration damping. This multi-functionality reduces the need for additional components and simplifies the overall device structure while improving ease of operation.
2Reliability
If the electromagnetic shield is positioned close to the communications device, then communication quality improves by reducing electromagnetic noise, but the ease of manufacture decreases due to positioning requirements
Solution Approach 1:
The viscoelastic layers integrate the positioning function with the attachment mechanism. By providing adhesive properties, the layers automatically position the metal sheet close to the communications device during the attachment process, eliminating the need for separate positioning operations and simplifying manufacturing while ensuring optimal electromagnetic shielding performance.
Solution Approach 2:
The viscoelastic layers enable self-positioning of the electromagnetic shield during attachment. The adhesive properties cause the metal sheet to naturally conform and position itself close to the communications device surface, reducing the need for precise manual positioning or additional positioning structures, thereby improving ease of manufacture while maintaining communication quality.
3Ease of operation
If viscoelastic layers are provided on both surfaces of the metal sheet, then ease of operation improves by enabling easy attachment to various surfaces, but the weight of the object increases
Solution Approach 1:
The viscoelastic layers are applied locally on the surfaces of the metal sheet where attachment is needed, rather than throughout the entire structure. This localized application provides the necessary adhesive properties for easy attachment to various surfaces while minimizing the overall weight increase, as the viscoelastic material is only present in thin layers at the interface surfaces.
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 enables straightforward attachment of the electromagnetic shield to diverse surfaces, including curved or uneven ones, while improving communication quality by reducing electromagnetic noise and increasing vibration resistance, thus making it suitable for various applications.
Implementation Method 1
a first viscoelastic layer 3 and a second viscoelastic layer 4 provided for both surfaces of the metal sheet 2 have viscosity, thereby allowing the metal sheet 2 to be attached onto another member
Implementation Method 2
a first viscoelastic layer 3 and a second viscoelastic layer 4 provided for both surfaces of the metal sheet 2 have viscosity, thereby allowing the metal sheet 2 to be attached onto another member
Implementation Method 3
the first viscoelastic layer 3 and the second viscoelastic layer 4 both have viscosity, thereby allowing the metal sheet 2 to be attached onto another member
Data Source
AI summary
An electromagnetic shield includes a metal sheet, a first viscoelastic layer, and a second viscoelastic layer. The metal sheet has a first surface and a second surface opposite from the first surface. The first viscoelastic layer is provided for the first surface. The second viscoelastic layer is provided for the second surface.