Semi-Dry EEG Electrode Assembly for Hair Penetration and Gel Control
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Solution Overview
Problem
Wet electrodes require extensive preparation time and cleaning, making them impractical for real-world Brain-Computer Interface (BCI) applications, while semi-dry electrodes face challenges in hair-layer penetration and conductive material dose control.
Innovation Solution
A semi-dry electrode assembly with a rotatable shaft and protrusion structure that delivers conductive material through hair penetration and dose control, allowing users to self-apply without professional help, using a case with a container and electrode design that includes a shaft and protrusion structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wet electrodes with conductive gel are used, then signal quality is improved, but preparation time and cleaning requirements increase
Solution Approach 1:
The electrode system is divided into separate functional components: a reusable electrode body and a disposable conductive gel cartridge. This segmentation allows the gel to be pre-loaded and sealed, eliminating preparation time while maintaining signal quality through controlled gel delivery.
Solution Approach 2:
The conductive gel is pre-loaded into sealed cartridges during manufacturing, and the electrode surface is pre-treated with conductive material. This preliminary preparation eliminates the need for time-consuming application steps while ensuring consistent signal quality when the electrode is activated.
2Ease of operation
If semi-dry electrodes are used, then ease of operation is improved, but hair-layer penetration and conductive material dose control deteriorate
Solution Approach 1:
A micro-pump mechanism acts as an intermediary between the conductive gel reservoir and the electrode surface, precisely controlling gel delivery. This intermediary component enables users to easily activate the electrode while ensuring accurate dose control of the conductive material.
Solution Approach 2:
The electrode incorporates an automated micro-pump system that self-regulates conductive gel delivery based on detected needs, eliminating the need for manual dose control while maintaining precision. Users simply activate the electrode, and the system handles the precise material distribution automatically.
3Ease of operation
If semi-dry electrodes are used, then ease of operation is improved, but conductive material dose control worsens
Solution Approach 1:
The electrode system incorporates sensors that monitor conductive material consumption and electrode-skin contact quality, providing feedback to a control system. This feedback loop automatically adjusts gel delivery to maintain optimal dose control while allowing easy user activation.
Solution Approach 2:
A micro-pump mechanism acts as an intermediary between the conductive gel reservoir and the electrode surface, precisely controlling gel delivery. This intermediary component enables users to easily activate the electrode while ensuring accurate dose control of the conductive material.
Data Source
AI summary
A semi-dry electrode assembly is disclosed, it comprises: a case having a container and an opening; and an electrode disposed in the container, comprising: a shaft, rotatably mounted on the case; and a protrusion structure on the shaft, wherein at least one part of the protrusion structure protrudes through the opening from the container.