Bio Potential Electrode With Segmented Metal Array
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Solution Overview
Problem
Conventional bio potential measuring electrodes face challenges in minimizing skin irritation, reducing motion artifacts, and maintaining signal accuracy during daily use, leading to reduced signal-to-noise ratios due to dynamic changes in the body's electrical characteristics.
Innovation Solution
A bio potential measuring electrode with a conductive adhesive of predetermined area and thickness, supported by a supporting element, and featuring multiple metal electrodes that form a robust impedance to prevent short-circuiting, along with an adhesion material for secure attachment, which also functions as a filter for electrical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the electrode area is minimized to reduce skin irritation, then skin irritation is reduced, but measurement accuracy deteriorates
Solution Approach 1:
The electrode is divided into multiple independent metal electrodes (first, second, third, fourth electrodes) arranged in a specific pattern on the conductive adhesive. This segmentation allows each electrode to be small in area, reducing skin irritation, while the distributed arrangement maintains adequate signal strength for accurate measurement.
Solution Approach 2:
The metal electrodes are arranged asymmetrically with specific spacing relationships - the distance between first and second electrodes differs from the distance between third and fourth electrodes. This asymmetric configuration optimizes the balance between minimizing individual electrode area and maintaining measurement accuracy through appropriate inter-electrode spacing.
2Ease of manufacture
If the electrode structure is simplified to improve ease of manufacture, then manufacturing complexity is reduced, but motion artifact resistance deteriorates
Solution Approach 1:
Multiple metal electrodes are integrated onto a single conductive adhesive layer, which itself is mounted on one supporting element. This merging of multiple functional components into a unified structure simplifies manufacturing while maintaining the geometric configuration needed to reduce motion artifacts.
Solution Approach 2:
The conductive adhesive is implemented as a thin, flexible layer that can conform to skin contours without creating rigid structures. This flexible film approach simplifies manufacturing compared to rigid electrode assemblies while the specific electrode arrangement on the flexible substrate maintains motion artifact resistance.
3Reliability
If the conductive adhesive thickness is increased to reduce impedance, then electrical conductivity is improved, but short-circuit risk increases
Solution Approach 1:
The thickness of the conductive adhesive is precisely controlled within a specific range (0.1mm to 1.0mm) to optimize the balance between electrical conductivity and short-circuit prevention. This parameter optimization ensures adequate signal transmission while maintaining sufficient insulation between adjacent metal electrodes.
Solution Approach 2:
The spacing between metal electrodes is designed to be asymmetric, with wider spacing in regions where short-circuit risk is higher. This asymmetric spacing configuration, combined with controlled adhesive thickness, prevents short-circuits while maintaining low overall impedance for good electrical conductivity.
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 configuration minimizes motion artifacts and enhances signal accuracy by maintaining a stable impedance and reducing interface changes, thereby improving the signal-to-noise ratio and user convenience.
Implementation Method 1
an impedance is formed between the at least two metal electrodes while the at least two metal electrodes are attached to the side of the conductive adhesive, the impedance depending on a thickness of the conductive adhesive and having a value that prevents the at least two metal electrodes from being shorted together
Implementation Method 2
an adhesion material coated on one side of the supporting element, the one side of the supporting element facing the living body while the conductive adhesive is attached to the living body, the adhesion material contacting the living body and adhering to the living body
Data Source
AI summary
An electrode for measuring a bio potential includes a conductive adhesive having one side configured to have at least two metal electrodes attached thereto while the electrode is being used, and another side configured to be attached to a living body while the electrode is being used, the conductive adhesive having a predetermined area and a predetermined thickness; and a supporting element configured to support the conductive adhesive while the conductive adhesive is attached to the living body; wherein an impedance is formed between the at least two metal electrodes while the at least two metal electrodes are attached to the side of the conductive adhesive, the impedance depending on a thickness of the conductive adhesive and having a value that prevents the at least two metal electrodes from being shorted together.