Universal EEG Cap with Carbon Fiber Electrodes and Fabric-Printed Wires
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Solution Overview
Problem
Current EEG caps face challenges in providing a universally fitting solution with high-performance electrodes and electrode-connecting wires, as existing systems often require multiple sizes and suffer from issues such as cumbersome setup and poor Signal-to-Noise Ratio (SNR) with wet electrodes, or inadequate performance with dry electrodes.
Innovation Solution
An EEG cap featuring a head covering made of auxetic fabric with embedded carbon fiber-based conductive silicone sponge electrodes and fabric-printed electrode-connecting wires, designed to fit various head shapes and sizes, ensuring secure contact and improved SNR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wet electrodes are used, then Signal-to-Noise Ratio is improved, but setup becomes cumbersome
Solution Approach 1:
The electrode combines conductive sponge material with carbon fiber particles to create a composite structure that provides both high electrical conductivity for excellent SNR and a dry, maintenance-free interface that eliminates setup complexity associated with traditional wet electrodes
Solution Approach 2:
The invention changes the physical and chemical parameters of the electrode material by incorporating carbon fiber into the sponge matrix, achieving optimal electrical conductivity and mechanical properties that enable high SNR performance without requiring conductive gels or liquids
2Ease of operation
If dry electrodes are used, then setup ease is improved, but Signal-to-Noise Ratio deteriorates
Solution Approach 1:
The conductive sponge electrode uses a composite of sponge material and carbon fiber particles to achieve high electrical conductivity typically associated with wet electrodes, while maintaining the dry interface benefits of ease of setup and no maintenance
3Adaptability or versatility
If EEG caps are manufactured in various sizes, then adaptability to different head sizes is improved, but device complexity increases
Solution Approach 1:
The EEG cap is designed with a universal fit approach using elastic materials and adjustable components that allow a single cap design to accommodate various head sizes and shapes, eliminating the need for multiple size variants while maintaining adaptability
Solution Approach 2:
The cap incorporates elastic and flexible materials that dynamically adapt to different head shapes and sizes, allowing the same physical structure to conform to various users without requiring multiple manufactured sizes
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 provides a universally fitting EEG cap with enhanced electrode performance, achieving impedance comparable to wet electrodes while maintaining comfort and ease of setup, and integrating flexible electrode-connecting wires for efficient signal transmission.
Implementation Method 1
each of the one or more electrodes comprise a conductive sponge comprising a two-part silicone foam, a silicone thinning fluid, and carbon fiber
Implementation Method 2
a head covering comprising auxetic fabric, wherein the auxetic fabric allows the head covering to fit on and conform to a head
Data Source
AI summary
An improved electroencephalogram (EEG) cap. In one embodiment, the EEG cap comprises a head covering comprising auxetic fabric, wherein the auxetic fabric allows the head covering to fit on and conform to a head, wherein the head is any shape and size; one or more electrodes disposed on an internal surface of the head covering, wherein each of the one or more electrodes comprise a conductive sponge comprising a two-part silicone foam, a silicone thinning fluid, and carbon fiber, and a sponge seat comprising a silicone or thermoplastic elastomer material, wherein the conductive sponge is disposed within the sponge seat; and one or more wires printedly embedded in the head covering that connect the one or more electrodes to external electronics.