Flexible Electrode Sheet for Body-Conforming Signal Acquisition
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Solution Overview
Problem
Existing electrode sheets face challenges in accommodating the varying distance between the position of biological signal acquisition and reference potential acquisition due to body shape differences, leading to noise issues with long wiring and inability to secure the reference potential electrode at prescribed positions, especially in cases like a pregnant woman's abdomen.
Innovation Solution
The electrode sheet design includes a flexible base material with integrated separation parts and a reference potential acquisition unit that can extend and fold, allowing for flexible placement of electrodes along the body's curvature, ensuring optimal signal acquisition and reference potential measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wiring line connected to the reference potential electrode is made long to reach prescribed positions, then the electrode can be positioned correctly, but the wiring line becomes prone to noise
Solution Approach 1:
The electrode sheet is divided into multiple independent electrode units, each with its own wiring line connected to the flexible base material. This segmentation allows each wiring line to be optimized for its specific route, reducing the effective length and noise exposure while maintaining connection to prescribed positions.
Solution Approach 2:
The flexible base material provides a two-dimensional routing path for wiring lines across the body surface, rather than using long one-dimensional wires. This allows wiring to follow the contour of the body, effectively shortening the path length and reducing noise susceptibility while reaching distant electrodes.
2Object-affected harmful factors
If the wiring line is made short to reduce noise, then noise interference is reduced, but the reference potential electrode cannot be arranged at prescribed positions
Solution Approach 1:
The flexible base material can be dynamically conforming to different body shapes and sizes, allowing electrode positions to be adjusted according to individual anatomical variations. The material's flexibility enables the same electrode sheet design to adapt to pregnant women's changing abdomen shapes throughout pregnancy.
Solution Approach 2:
The use of a flexible base material as the substrate for electrodes and wiring allows the entire assembly to conform to curved body surfaces. This flexibility enables short wiring paths to reach prescribed positions by following the body's contour rather than requiring long straight wires.
3Manufacturing precision
If the electrode sheet is made rigid to maintain electrode positions, then positioning precision is improved, but the sheet cannot conform to body curvatures and accommodate body shape changes
Solution Approach 1:
The flexible base material serves as both the structural substrate and the conforming element, eliminating the need for rigid components. The material naturally conforms to body curvatures while maintaining electrode positions relative to each other, accommodating body shape changes such as abdominal expansion during pregnancy.
Solution Approach 2:
The flexible base material's physical parameters (flexibility, elasticity) are optimized to allow conforming to body surfaces while maintaining sufficient structural integrity to hold electrode positions. The material can stretch and deform elastically to accommodate body shape changes while returning to its original configuration.
4Adaptability or versatility
If the electrode sheet is made flexible to conform to body shapes, then adaptability to body size and shape is improved, but electrode positioning precision may be compromised
Solution Approach 1:
The flexible base material integrates multiple functions: structural support, electrical insulation, mechanical flexibility, and positioning reference. By combining these functions into a single component, the design achieves both flexibility for body conformation and precision for electrode positioning without compromising either attribute.
Data Source
AI summary
An electrode sheet is provided which can be flexibly adapted to the position where a signal is acquired. This electrode sheet 1, which is attached to a living body M and acquires a biological signal, is provided with a sheet-form biological signal acquisition unit 10 which is attached to a living body part where a biological signal is acquired, and a reference potential acquisition unit 20 which extends from the living body signal acquisition unit and which is attached to a living body part where a reference potential is acquired, wherein the reference potential acquisition unit 20 is provided with multiple electrodes 23 which are arranged at a prescribed interval along the direction of extension and each of which can attach to the living body part where the reference potential is acquired.