Fiber Composite Electromagnetic Shielding via Conduction Fibers
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Solution Overview
Problem
In modern aircraft construction, fiber composite components require effective electromagnetic shielding to prevent interference from electric conductors and sensors, while minimizing weight and installation effort, which existing methods fail to achieve efficiently.
Innovation Solution
Integrating reinforcing fibers as conduction fibers within the fiber composite layer to actively produce opposing electromagnetic fields, using electrically insulating coatings to reduce leakage currents and maintain structural integrity, and employing a control device to manage currents for optimal shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional electromagnetic shielding housings are used to protect electric conductors, then electromagnetic interference is effectively blocked, but weight and installation volume increase significantly
Solution Approach 1:
The patent merges the structural fiber composite layers with electromagnetic shielding functionality by designing specific fiber arrangements (conduction fibers and screen fibers) that provide shielding within the composite structure itself, eliminating the need for separate shielding housings
Solution Approach 2:
The fiber composite layers serve multiple functions simultaneously: structural reinforcement, electromagnetic shielding, and electrical conduction control. The same composite material that provides mechanical strength also provides electromagnetic interference protection through carefully arranged conductive and screen fibers
2Object-affected harmful factors
If shielding housings are used to protect electric conductors, then electromagnetic interference is blocked, but installation effort and complexity increase
Solution Approach 1:
The shielding function is merged into the fiber composite manufacturing process itself. The conduction fibers and screen fibers are integrated into the composite layers during automated fiber placement, so shielding is achieved as part of the structural component fabrication rather than as a separate installation step
Solution Approach 2:
The fiber composite structure provides its own electromagnetic shielding through the inherent arrangement of conduction and screen fibers within the composite layers, eliminating the need for external shielding components and their associated installation complexity
3Object-affected harmful factors
If conduction fibers are used for active electromagnetic shielding, then shielding effectiveness is improved, but power consumption increases
Solution Approach 1:
The control device activates conduction fibers only when electromagnetic interference is detected or anticipated, rather than maintaining continuous current flow. This periodic or on-demand activation significantly reduces power consumption while maintaining shielding effectiveness when needed
Solution Approach 2:
The control device monitors electromagnetic field conditions and adjusts conduction fiber activation accordingly, using feedback from sensors or predetermined operational conditions to optimize power usage while maintaining adequate shielding performance
4Reliability
If electrically insulating coatings are applied to conduction fibers, then leakage currents are reduced, but manufacturing complexity increases
Solution Approach 1:
The insulating coating changes the electrical parameters of the conduction fibers by providing electrical insulation while maintaining mechanical properties. This parameter modification allows the fibers to function as both structural elements and controlled conduction paths with reduced leakage
Solution Approach 2:
The conduction fibers are constructed as composite structures with an electrically conductive core and an electrically insulating coating layer. This composite fiber design combines the beneficial electrical properties of conductive materials with the insulating properties of coating materials
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
This approach provides lightweight, flexible, and efficient active electromagnetic shielding that effectively attenuates electromagnetic interference without increasing power consumption or weight, suitable for complex fiber composite components like those produced by automated fiber placement methods.
Implementation Method 1
conduction fibers, which are arranged to follow the electric conductor within the fiber composite layer and are designed to produce an opposing electromagnetic field during operation which attenuates the electromagnetic field of the electric conductor
Implementation Method 2
The conduction fibers can each be designed as carbon fibers with an electrically insulating coating
Data Source
AI summary
A fiber composite component with integrated active electromagnetic shielding includes a fiber composite layer having reinforcing fibers, and an electric conductor, which extends on the fiber composite layer along the fiber composite layer and produces an electromagnetic field during operation, wherein a proportion of the reinforcing fibers is designed as conduction fibers, which are arranged to follow the electric conductor within the fiber composite layer and are designed to produce an opposing electromagnetic field during operation which attenuates the electromagnetic field of the electric conductor.