Permeable Electrode Array Design for Robust Body Contact
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Solution Overview
Problem
Current electrode systems for electrical stimulation and biosignal detection face issues such as inadequate contact, discomfort, and limited use across multiple paradigms due to non-robust impedance characteristics at the electrode-user interface.
Innovation Solution
A new electrode system featuring an array of permeable bodies that absorb and deliver a solution for electrical coupling, combined with a housing and electronics subsystem, providing a robust and non-invasive connection for both stimulation and biosignal detection, with optional invasive capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrode systems are used for electrical stimulation, then the device structure is simple, but the contact between electrode and subject is inadequate and impedance characteristics are non-robust
Solution Approach 1:
The electrode system is segmented into multiple functional layers including a substrate, gel layer, and array of conductive elements. This segmentation allows each layer to perform its specific function optimally while collectively achieving robust electrical contact and reliable impedance characteristics.
Solution Approach 2:
The electrode system employs composite materials combining conductive polymers, gels, and flexible substrates. This composite structure integrates the electrical conductivity of metals with the flexibility and conformability of polymers, achieving both reliable contact and manageable device complexity.
2Ease of operation
If traditional electrode systems are used, then the device is easy to manufacture, but subject discomfort occurs during use
Solution Approach 1:
The electrode system uses flexible thin-film substrates and compliant conductive layers that can conform to the subject's body contours. This flexibility significantly improves subject comfort during use while the thin-film nature maintains ease of manufacturing through standard flexible PCB and thin-film deposition techniques.
3Adaptability or versatility
If traditional electrode systems are used, then the structure is simple, but the system has limited use within multiple electrical stimulation or biosignal detection paradigms
Solution Approach 1:
The electrode system is designed with universal functionality to support multiple electrical stimulation paradigms (TENS, NMES, tDCS) and biosignal detection modes (EEG, ECG, EMG). The array of conductive elements can be selectively activated and configured through software control, enabling one physical device to perform multiple functions without increasing structural complexity.
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 achieves reliable and comfortable electrical stimulation and biosignal detection by ensuring consistent contact and improved impedance, supporting multiple stimulation forms and biosignal types, including EEG, MEG, GSR, EOG, and EMG.
Implementation Method 1
an array of permeable bodies configured to absorb and deliver a solution that facilitates electrical coupling between the system and a body region of the user
Data Source
AI summary
A system for electrically stimulating a user comprising: a first housing portion defining an array of openings; an array of permeable bodies with portions exposed through the array of openings and wetted with a solution that facilitates electrical coupling between the system and a body region of the user, wherein each permeable body has a cavity at a proximal portion and a distal portion and is configured to transmit the solution to the body region of the user; a substrate region defining an array of protrusions configured to support the array of permeable bodies and composed of a conductive polymer; and a set of conductors in communication with the substrate region and including a first conductor that provides a first subset of the array of permeable bodies with a first polarity and a second conductor that provides a second subset of the array of permeable bodies with a second polarity.