Seamless Knitted Electrode Layout for Skin Comfort and Signal Quality
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Solution Overview
Problem
Conventional textile-based electrode systems cause discomfort due to stitched or sewn electrodes that rub against the skin, are prone to wear and tear, and increase overall cost, while often requiring two electrodes to be aligned for proper functioning.
Innovation Solution
A textile-based electrode system with knitted electrodes and conductive pathways integrated seamlessly within fabric layers, eliminating the need for stitching, reducing discomfort, and allowing for multiple electrodes to be positioned freely for improved signal quality and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If electrodes are stitched or sewn into the textile-based system, then the electrodes can be securely attached to the fabric, but the stitched electrodes rub against the user's skin causing chafing and rashes, reducing user comfort
Solution Approach 1:
The electrode is merged with the conductive yarn during the knitting process itself, creating a seamless integration where the electrode material becomes an intrinsic part of the fabric structure. This eliminates separate stitching operations and the associated skin irritation from stitches rubbing against the skin.
Solution Approach 2:
The mechanical stitching process is replaced by an electrochemical deposition process where conductive material is deposited directly onto the knitted fabric at precise locations during or after knitting. This substitution eliminates the mechanical penetration of needles and threads that cause skin irritation.
2Strength
If electrodes are stitched or sewn into the system, then they can be attached to the fabric, but the stitched electrodes are prone to wear and tear from repeated use or washing, reducing system lifespan
Solution Approach 1:
The electrode is merged with the conductive yarn during the knitting process itself, creating a seamless integration where the electrode material becomes an intrinsic part of the fabric structure. This eliminates separate stitching operations and the associated skin irritation from stitches rubbing against the skin.
Solution Approach 2:
The conductive material is deposited onto the fabric at precise locations during or immediately after the knitting process, ensuring the electrode is permanently bonded to the fabric structure before the garment undergoes repeated washing and wearing. This preliminary integration prevents later degradation.
3Strength
If electrodes are stitched or sewn into the system, then they can be attached to the fabric, but this increases the overall cost of the system
Solution Approach 1:
The electrode is merged with the conductive yarn during the knitting process itself, creating a seamless integration where the electrode material becomes an intrinsic part of the fabric structure. This eliminates separate stitching operations and the associated skin irritation from stitches rubbing against the skin.
Solution Approach 2:
The knitting machine is used to create both the fabric structure and the electrode integration in a single process. The same knitted fabric serves both as the garment material and as the substrate for the electrode, eliminating the need for separate attachment operations and reducing manufacturing complexity.
4Device complexity
If the system is configured to work with only two electrodes, then the structure is simpler, but the electrodes need to be located and aligned proximate to each other, limiting positioning flexibility
Solution Approach 1:
The system is segmented into multiple independent electrode zones within the fabric, each capable of being positioned independently. The knitted fabric can be configured with multiple discrete conductive regions that can be placed at different locations on the user's body, allowing flexible positioning beyond just two fixed electrodes.
Solution Approach 2:
The electrode positioning moves from a linear arrangement (two electrodes aligned in one dimension) to a two-dimensional distribution across the fabric surface. Multiple electrodes can be positioned at various locations on the fabric, enabling placement at different body sites for measuring multiple physiological parameters simultaneously.
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 system provides enhanced user comfort, extended lifespan, and improved signal quality by using knitted electrodes and conductive pathways, enabling multiple physiological parameters to be measured accurately without the limitations of conventional systems.
Implementation Method 1
a knitted electrode configured to be placed in contact with the skin of a user... a knitted conductive pathway configured to be electrically coupled to the knitted electrode
Implementation Method 2
the second fabric layer is folded about a first fold axis to place the second fabric layer in contact with the outer surface of the first fabric layer
Data Source
AI summary
A textile-based electrode system includes a first fabric layer having an inner and an outer surface. The inner surface includes a knitted electrode configured to be placed in contact with the skin of a user. A second fabric layer is disposed and configured to contact the outer surface of the first fabric layer. The second fabric layer includes a knitted conductive pathway configured to be electrically coupled to the knitted electrode. Furthermore, a third fabric layer is configured and disposed to contact the second fabric layer. A connector is disposed on the third fabric layer and is configured to be electrically coupled to the knitted conductive pathway. The second fabric layer can be folded about a first fold axis and the third fabric layer can be folded about a second fold axis to place the second fabric layer in contact with the first fabric layer and the third fabric layer.