Hydrogel EEG Electrode Merging Conduction and Fixation
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Solution Overview
Problem
Existing EEG signal detection systems face challenges in achieving a simple and efficient electrode positioning process, as they require the use of glues, creams, and conductive gels, which complicate the cleaning process and increase setup time.
Innovation Solution
A system utilizing a single layer of dense, conductive, and adhesive hydrogel as both the conduction and fixation means for EEG electrodes, allowing for quick and easy positioning and removal without leaving harmful residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glues and creams are used for electrode fixation, then firm positioning is achieved, but cleaning becomes difficult and requires harsh solvents
Solution Approach 1:
The patent combines the fixation function and conduction function into a single hydrogel layer. This eliminates the need for separate glue and conductor applications, and the hydrogel can be removed with mild aqueous solutions rather than harsh solvents, resolving the contradiction between secure positioning and easy cleaning.
Solution Approach 2:
The hydrogel layer serves multiple functions simultaneously: it provides firm fixation of the electrode, conducts electrical signals from the scalp to the electrode, and allows for gentle removal with water-based solutions. This multi-functionality resolves the contradiction by eliminating the need for harsh cleaning agents while maintaining reliable positioning.
2Reliability
If multiple components (glue + conductive gel) are used for electrode positioning, then fixation and conduction are achieved, but setup time increases
Solution Approach 1:
The patent merges the fixation function and conduction function into a single hydrogel layer. This eliminates the need for separate glue and conductor applications, reducing the number of steps in the positioning procedure while maintaining both firm fixation and accurate signal conduction.
Solution Approach 2:
The hydrogel layer performs multiple functions simultaneously - providing firm fixation, ensuring good electrical contact, and enabling easy removal. This multi-functionality reduces setup time by eliminating sequential application steps while maintaining positioning accuracy.
3Reliability
If elastic caps with liquid gel are used for electrode support, then fixation is achieved, but system complexity and configuration time increase
Solution Approach 1:
The patent extracts the fixation and conduction functions from the complex elastic cap system and implements them through a simple hydrogel layer applied directly to the scalp. This eliminates the need for multiple cap sizes and complex configuration while maintaining reliable electrode fixation.
Solution Approach 2:
The hydrogel layer provides both fixation and conduction functions in a single component, eliminating the need for complex elastic cap structures and multiple sizes. This simplifies the system while maintaining electrode stability through its adhesive and conductive properties.
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 solution streamlines the electrode placement process, reduces setup time, and minimizes the harshness of cleaning agents, while ensuring accurate signal transmission and reducing skin trauma.
Implementation Method 1
conduction means of said signal constituted by a single layer of hydrogel, which guarantees both the gluing to the scalp and the conduction of electrical signals
Implementation Method 2
a particularly dense, nearly solid polymer is made, and has both conductive and adhesive features
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
System for detecting electroencephalographic signals comprising at least one electrode (1) for the transmission of the detected signal, conduction means of said signal interposed between the electrode (1) and the scalp of a patient (3) and fixation means of said electrode (1) to the scalp. Moreover, said conduction means and said fixation means are constituted by a single layer of hydrogel.