Stretchable Fabric Electrode Belt for Biometric Signal Measurement
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Solution Overview
Problem
Existing electrode belt apparatuses for biometric signal measurement face challenges in maintaining accurate and comfortable long-term use due to unreliable electrode connections and potential skin irritation from conductive gels or glues.
Innovation Solution
An electrode belt apparatus featuring a stretchable belt body with integrated conductive fabric electrodes, a flexible circuit layer, and a cover layer with markers, using conductive yarn for power connection and differential amplification circuits to enhance signal accuracy and comfort, while avoiding skin irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive gel or glue is applied to the electrode for stable contact, then measurement reliability is improved, but skin irritation or infection may occur during long-term use
Solution Approach 1:
The patent removes the conductive gel or glue from the electrode structure, replacing it with a dry electrode design that uses conductive material integrated into the electrode body itself. This extraction of the harmful substance (gel/glue) eliminates the source of skin irritation while maintaining electrical conductivity through alternative means.
Solution Approach 2:
The patent introduces an intermediary conductive material that is integrated into the electrode structure, serving as a mediator between the electrode and skin contact. This intermediary material provides the necessary electrical conductivity without requiring external conductive gels or glues, thus avoiding skin irritation while maintaining measurement reliability.
2Adaptability or versatility
If the electrode belt is made stretchable to accommodate volume changes, then comfort and adaptability are improved, but connection reliability between electrodes and circuit may deteriorate
Solution Approach 1:
The patent employs dynamic connection structures including elastic conductive materials and flexible circuit boards that can dynamically adjust to stretching and deformation. These dynamic elements maintain reliable electrical connections even when the belt is stretched to accommodate volume changes, preventing connection failure while preserving adaptability.
Solution Approach 2:
The patent uses flexible circuit boards and thin elastic conductive layers as the connection medium between electrodes and the circuit unit. These flexible elements can bend, stretch, and deform without breaking the electrical connection, maintaining reliability while allowing the belt to adapt to changing body volumes.
3Stability of the object's composition
If conductive yarn is used for power connection in the circuit layer, then elasticity and stretchability are improved, but manufacturing precision may be affected
Solution Approach 1:
The patent changes the physical parameters of the conductive yarn, including its elasticity modulus, diameter, and stitching pattern, to optimize both elasticity and manufacturing precision. By carefully selecting and controlling these parameters, the conductive yarn maintains sufficient elasticity for stretchable wear while achieving precise electrical connections through controlled stitching or bonding processes.
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 apparatus provides stable and accurate biometric signal measurement over time, suitable for critical patients or children, with improved elasticity and multiple signal connections, reducing pressure and maintaining measurement performance even with volume changes.
Implementation Method 1
a plurality of electrodes made of a conductive fabric... configured to measure voltage signals based on impedance of a subject
Implementation Method 2
a differential amplification circuit to amplify the voltage signal
Data Source
AI summary
Disclosed is a fabric electrode belt for measuring a biometric signal. The fabric electrode belt for measuring a biometric signal according to an embodiment of the disclosure includes: a belt body unit including a stretchable material, and provided with electrodes to be in contact with a subject to be examined; and a circuit unit coupled to the belt body unit and configured to receive an electric signal based on impedance of a subject to be examined, measured by the electrodes, the circuit unit being disposed between the belt body units.