Moisture-Absorbing Dry Electrode for Stable Physiological Signal Detection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional dry electrodes for measuring physiological signals lack the signal reception and skin comfort of wet electrodes, while wet electrodes are inconvenient and can cause skin irritation.

Innovation Solution

A moisture-absorbing dry electrode with a substrate and a moisture-absorbing conductive film made of a mixture of carbon paste, a moisture-absorbing material, and a cross-linking agent, which absorbs moisture to increase contact area and improve signal detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If wet electrodes are used to achieve good signal reception, then signal quality is improved, but convenience deteriorates due to residual paste requiring cleaning and skin irritation

Engineering Contradiction:

Improvesignal reception qualityVSAvoidconvenience of use

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent extracts and eliminates the gel or paste component from the electrode system. The dry electrode achieves good signal reception through direct skin contact without requiring any gel-like substances, thereby removing the need for cleaning residual paste and avoiding skin irritation while maintaining measurement precision

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses composite materials in the electrode structure, combining conductive materials with moisture-absorbing materials to create a dry electrode that can maintain low impedance and good signal reception without requiring external gel substances, thus improving both signal quality and convenience

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If dry electrodes are used to achieve convenience, then ease of operation is improved, but signal reception deteriorates

Engineering Contradiction:

Improveconvenience of useVSAvoidsignal reception quality

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent introduces moisture-absorbing material as an intermediary between the dry electrode and the skin. This intermediary component absorbs moisture from the environment or sweat to create a conductive interface, enabling the dry electrode to achieve low impedance and good signal reception while maintaining the convenience of no gel application

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the physical and chemical parameters of the electrode by incorporating moisture-absorbing materials that can dynamically adjust the moisture content at the skin-electrode interface. This parameter change enables the dry electrode to maintain optimal electrical contact and signal reception quality under varying conditions

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If dry electrodes are used to avoid gel substances, then skin comfort is improved, but signal stability deteriorates

Engineering Contradiction:

Improveskin irritationVSAvoidsignal stability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent implements self-service by incorporating moisture-absorbing material within the dry electrode structure itself. The electrode autonomously absorbs moisture from the environment or sweat to maintain stable electrical contact with the skin, eliminating the need for external gel substances while ensuring signal stability and preventing skin irritation

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent uses porous moisture-absorbing materials in the electrode construction. These porous materials provide a large surface area for moisture absorption, enabling the dry electrode to maintain consistent electrical contact and signal stability without requiring gel substances, thereby improving both skin comfort and signal reliability

Inventive Principle:

Principle #31Porous materials

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 moisture-absorbing dry electrode enhances signal reception and stability, providing the convenience and stability of dry electrodes with the good signal reception and skin comfort of wet electrodes, without requiring additional electrolytes or gel-like substances.

Implementation Method 1

The moisture-absorbing conductive film is configured to absorb moisture

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

the moisture-absorbing material includes a nanomaterial or an inorganic adsorbent material

Methodology Applied

Scientific EffectAdsorption: Adsorption

Data Source

PatentUS20250120638A1Moisture-absorbing dry electrode and smart clothing

Publication Date: 2025.04.17 MAKALOT INDAL

AI summary

A moisture-absorbing dry electrode and smart clothing. The moisture-absorbing dry electrode includes a substrate and a moisture-absorbing electrode. The substrate has a surface. The moisture-absorbing electrode includes at least one moisture-absorbing conductive film, and the moisture-absorbing conductive film is used to absorb moisture and disposed on the surface of the substrate. The material of the moisture-absorbing conductive film includes a uniform mixture of carbon paste, a moisture-absorbing material and a cross-linking agent, and the moisture-absorbing material includes a nanomaterial or an inorganic adsorbent material, or a combination thereof.