Dry EEG Electrode Rotary Closure Vibration Contact
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Solution Overview
Problem
Conductive gel is cumbersome for establishing contact between EEG electrodes and the scalp, prompting the need for a dry electrode solution that ensures effective electrical contact without gel.
Innovation Solution
A dry EEG electrode with a brush-like sensor and attaching device featuring a rotary closure system, allowing adjustment and secure placement on the scalp through hair, utilizing a vibration element for improved contact and impedance conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive gel is applied between the scalp and electrode, then electrical contact is established, but the procedure becomes cumbersome and requires additional materials
Solution Approach 1:
The patent removes the conductive gel from the system entirely, extracting the problematic intermediate material while maintaining electrical contact through direct skin-electrode contact enabled by the vibration mechanism
Solution Approach 2:
The patent applies mechanical vibration to the electrode or scalp to temporarily increase skin conductivity and facilitate electrical contact without requiring conductive gel, thereby eliminating the cumbersome gel application step
2Ease of operation
If dry electrode is used without conductive gel, then application becomes simpler, but reliable electrical contact through scalp hair is difficult to achieve
Solution Approach 1:
The patent uses mechanical vibration to temporarily disrupt the scalp hair and increase skin conductivity at the contact point, enabling reliable electrical contact with dry electrodes without requiring conductive gel
Solution Approach 2:
The patent applies vibration before or during electrode placement to pre-condition the scalp surface, temporarily increasing conductivity and preparing the contact area for reliable signal acquisition
3Reliability
If vibration element is added to the electrode, then contact through hair is improved, but device complexity increases
Solution Approach 1:
The patent integrates the vibration element directly into the electrode structure, merging two previously separate components (electrode and vibration generator) into a single unified device
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
Enables reliable and adjustable contact between the dry electrode and scalp, facilitating accurate EEG signal detection without the need for conductive gel, with the vibration element enhancing signal quality and ease of use.
Implementation Method 1
the body includes a vibration element and a connector which transfers a vibration of the vibration element to the sensor
Data Source
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AI summary
An attaching device for holding electrodes for detecting EEG signals comprises a strap including a plurality of holes for accommodating electrodes and a rotary closure connecting a first end of the strap and a second end of the strap. The rotary closure includes a reference electrode and/or a ground electrode which are arranged centrally on a first surface of the rotary closure. The reference electrode and/or the ground electrode are in contact with a forehead when the attaching device is placed on a head and are positioned substantially centrally on a center line of the head.