Dry Electrode with Conductive Silicone and Ag/AgCl Coating
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Solution Overview
Problem
Existing bio-signal detection technologies rely heavily on wet electrodes, which are cumbersome and less convenient for use, necessitating the development of a dry electrode that can match the performance of wet electrodes in signal detection.
Innovation Solution
A dry electrode comprising a body part and a protrusion part made of conductive silicone, with a coating part containing Ag and AgCl, optionally including 3-aminopropyltriethoxysilane, to enhance conductivity and adhesion, allowing for effective bio-signal detection without the need for a separate ion channel or patch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wet electrodes are used for bio-signal detection, then signal detection sensitivity is improved, but ease of operation deteriorates due to cumbersome handling and application requirements
Solution Approach 1:
The patent extracts the essential function of wet electrodes (signal detection sensitivity) and transfers it to a dry electrode structure through the coating part containing Ag and AgCl. This eliminates the need for conductive gel while maintaining detection performance, thereby resolving the contradiction between sensitivity and ease of operation.
Solution Approach 2:
The patent changes the material parameters of the electrode by incorporating Ag and AgCl in the coating part, which fundamentally alters the electrode's ability to detect bio-signals without requiring external conductive media. This parameter change enables dry electrodes to achieve wet electrode-level sensitivity.
2Measurement precision
If a coating part containing Ag and AgCl is added to the dry electrode, then signal detection sensitivity is improved, but device complexity increases
Solution Approach 1:
The patent segments the electrode into distinct functional parts: the body part for structural support and the coating part for signal detection. This segmentation allows each part to be optimized independently, maintaining overall simplicity while achieving high sensitivity through the specialized coating.
Solution Approach 2:
The patent uses composite materials by combining Ag and AgCl in the coating part, creating a material with enhanced electrochemical properties for bio-signal detection. This composite approach improves sensitivity without significantly increasing structural complexity.
3Reliability
If 3-aminopropyltriethoxysilane is included in the coating part, then adhesion and durability are improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates 3-aminopropyltriethoxysilane into the coating part formulation in advance, which pre-establishes strong adhesion properties before the electrode is applied to the skin. This preliminary action ensures durability without requiring additional manufacturing steps.
Solution Approach 2:
The patent changes the chemical composition parameters of the coating part by including 3-aminopropyltriethoxysilane, which fundamentally improves adhesion and durability. This compositional change enhances reliability while maintaining manufacturing simplicity through direct incorporation into the coating formulation.
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 dry electrode achieves signal detection sensitivity equivalent to wet electrodes, reduces measurement time, and is more convenient to use, with improved adhesion and durability due to the inclusion of 3-aminopropyltriethoxysilane in the coating.
Implementation Method 1
the coating part may include Ag and AgCl
Implementation Method 2
the coating part may include Ag, AgCl, and 3-aminopropyltriethoxysilane
Data Source
AI summary
Provided is a dry electrode for detecting a bio-signal, comprising a body part; a protrusion part formed on one surface of the body part; and a coating part formed on an end surface of the protrusion part, wherein the body part and the protrusion part comprise a conductive silicone, and the coating part comprises Ag, AgCl, and, optionally, 3-aminopropyltriethoxysilane.