Permeable Electrode Array with Fluid Channels for Robust Skin Contact
Solution Overview
Problem
Current electrode systems for electrical stimulation and biosignal detection face issues such as inadequate contact, discomfort, and limited versatility across multiple paradigms due to insufficient contact and robustness.
Innovation Solution
A system featuring an array of permeable bodies with fluid-absorbing materials for electrical coupling, a housing with protrusions to facilitate solution delivery and electrode placement, and an electronics subsystem for stimulation and signal detection, allowing for both invasive and non-invasive applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrode systems are used for electrical stimulation, then the system structure is simple, but the contact between electrode and subject is inadequate and not robust
Solution Approach 1:
The electrode contact surface is segmented into multiple discrete contact elements (protrusions or recesses) rather than a single continuous surface. This segmentation allows each element to independently establish reliable contact with the subject's skin, overcoming the inadequacy of traditional single-surface electrodes while maintaining manageable system complexity through modular design.
Solution Approach 2:
A conductive gel or electrolyte solution is introduced as an intermediary medium between the electrode contact elements and the subject's skin. This intermediary enhances electrical coupling and contact robustness by filling micro-gaps and improving ionic conduction, thereby resolving the contact reliability issue without requiring direct rigid mechanical contact.
2Object-affected harmful factors
If traditional electrode systems are used, then the system is easy to manufacture, but subject discomfort occurs during use
Solution Approach 1:
The electrode system implements local quality variations by creating specific protrusions or recesses at contact points rather than a uniform surface. This localized structural modification concentrates pressure at discrete points, improving contact reliability while distributing overall discomfort, and can be manufactured using standard molding techniques that add minimal complexity.
Solution Approach 2:
The electrode incorporates composite construction combining conductive materials with compliant, skin-friendly materials. This composite approach allows the electrode to conform to skin contours, reducing discomfort from rigid contact while maintaining electrical conductivity, and can be manufactured through co-molding or lamination processes.
3Adaptability or versatility
If traditional electrode systems are used, then the system structure is simple, but the versatility across multiple stimulation paradigms is limited
Solution Approach 1:
The electrode contact array design provides universal applicability across multiple stimulation paradigms (e.g., transcranial direct current stimulation, transcranial alternating current stimulation, transcranial random noise stimulation) by enabling flexible configuration of active and inactive contact elements. The same physical structure can be programmed for different stimulation patterns, achieving multi-functionality without proportional increases in hardware complexity.
Solution Approach 2:
The electrode system incorporates dynamic control capabilities where individual contact elements can be independently activated or deactivated during stimulation. This dynamic reconfiguration allows the same physical electrode to adapt to different stimulation protocols and target different brain regions, providing versatility while maintaining a fixed, manufacturable physical structure.
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 a robust, comfortable, and versatile means of electrical stimulation and biosignal detection, enhancing electrode-to-tissue contact and reducing resistance, while accommodating various stimulation forms and modes.
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
Figure 1
Figure 2A~3B
Figure 4A~4B
AI summary
A system for electrically stimulating and/or detecting bioelectrical signals of a user comprising: an array of permeable bodies configured to absorb a solution that facilitates electrical coupling with a body region of the user; a housing defining an array of protrusions conforming to the body region and comprising: an array of channels distributed across the array of protrusions, each channel at least partially surrounding a permeable body, configured to deliver the solution to the permeable body, and comprising a barrier that prevents passage of the permeable body past the barrier, and a manifold configured to distribute the solution to the array of channels; and a coupling subsystem comprising a first electrical coupling region in electrical communication with an interior of the manifold, wherein the first electrical coupling region is configured to couple to a second electrical coupling region that couples the first electrical coupling region to the electronics subsystem.