Bio-Signal Electrode Structure With Loose Sections for Stable Skin Attachment
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Solution Overview
Problem
Bio-signal measurement devices face issues with electrode detachment due to sweat and moisture, varying user sizes, and movement-induced forces, leading to signal degradation and suboptimal attachment.
Innovation Solution
The electrode structure incorporates flexible, elastic loose sections without adhesive between electrodes and a substrate layer with attachable sections, which allows for adjustable sizing and minimizes detachment during movement, while preventing moisture-induced short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive gel is used to attach electrodes to skin, then electrode attachment is improved, but moisture-induced short circuits occur when user sweats
Solution Approach 1:
The electrode structure is divided into multiple independent sections: adhesive sections for skin attachment, loose non-adhesive sections for moisture management, and conductor sections for signal transmission. This segmentation allows the adhesive portions to maintain attachment while the loose portions prevent moisture-induced short circuits between electrodes.
Solution Approach 2:
The loose section acts as an intermediary element between the adhesive sections and conductor sections. It provides mechanical flexibility and creates physical separation that prevents moisture from creating continuous conductive paths between electrodes, while still allowing the structure to move with the skin.
2Area of stationary object
If patch electrode size is increased for taller users, then coverage is improved, but distance between electrodes increases reducing measurement quality
Solution Approach 1:
The electrode structure incorporates loose sections that provide dynamic adaptability. The structure can stretch and conform to different body sizes and shapes, allowing a single electrode design to optimize the distance between electrodes for various user heights and body types while maintaining consistent measurement quality.
3Reliability
If adhesive is used to secure electrodes during movement, then attachment stability is improved, but twisting and stretching forces deteriorate attachment over time
Solution Approach 1:
The electrode structure alternates between adhesive sections and loose non-adhesive sections. The adhesive sections maintain secure attachment to the skin, while the loose sections act as stress-relief zones that accommodate twisting and stretching movements, preventing force concentration that would otherwise deteriorate the adhesive attachment.
Solution Approach 2:
The loose sections serve as pre-positioned stress-absorbing elements that cushion the adhesive sections from mechanical stresses during movement. By placing these flexible sections between rigid adhesive areas, the structure anticipates and mitigates the damaging effects of twisting and stretching forces before they can compromise attachment integrity.
4Reliability
If continuous adhesive coverage is used between electrodes, then attachment is improved, but moisture forms continuous conductor causing short circuits
Solution Approach 1:
The electrode structure is segmented into adhesive sections and loose non-adhesive sections in an alternating pattern. This segmentation creates discontinuous adhesive coverage that prevents sweat from forming continuous conductive paths between electrodes, while the adhesive sections maintain sufficient attachment stability for reliable bio-signal measurement.
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 design enhances bio-signal measurement reliability by maintaining stable electrode attachment and signal quality across different user sizes and movements, reducing the impact of sweat and moisture, and allowing for optimal sizing adjustments.
Implementation Method 1
Each of the loose sections 106 is flexible, elastic and free from an adherence to the skin 300 when the electrode structure 10 is applied on the skin 300
Implementation Method 2
The electrode structure 10 comprises at least two electrodes 100, which are adapted to be adhered on the skin 300 with an adhesive 302
Data Source
AI summary
An electrode structure of a bio-signal measurement comprises electrodes adapted to be adhered on skin with an adhesive and separated from each other. A connector arrangement for an electric contact with an external electric device is on an opposite side of the electrode structure. Electric conductors are electrically connected with the electrodes and the connector arrangement. The electrode structure comprises attachable sections directly adjacent to one of the at least two electrodes, the attachable sections being adapted to be adhered on the skin. The electrode structure comprises a flexible and elastic loose section, which is free from an adherence to the skin, each of the attachable sections being located between an electrode and a loose section.