Smart Electrode Structures with Embedded Signal Processing
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Solution Overview
Problem
Current wearable devices for sensing neuromuscular signals are bulky, uncomfortable, and delayed in gesture recognition due to separate signal-processing components, relying on wet electrodes and multiple sensors, which hinders user adoption of in-air gestures and is not socially acceptable for extended wear.
Innovation Solution
Active-embedded dry bio-electrodes that house signal-processing components internally, reducing latency and cabling, allowing for direct processing of neuromuscular signals and eliminating the need for electrode gel, while being modular and comfortable for extended wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If separate signal-processing components are used, then signal processing capability is improved, but device size and bulkiness increase
Solution Approach 1:
The patent combines the signal-processing components directly into the electrode structure, merging two previously separate functions (sensing and signal processing) into a single integrated component. This eliminates the need for separate processing units and reduces overall device volume while maintaining full signal processing capability.
Solution Approach 2:
The signal-processing components are nested within the electrode housing, with the processing circuitry contained inside the electrode structure itself. This nesting approach allows the processing functionality to be embedded within the existing electrode volume rather than requiring additional external space.
2Measurement precision
If multiple sensors and electromagnetic shielding components are included, then sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The electrode is designed to perform multiple functions simultaneously: it acts as both the sensing element and the signal-processing unit. The electromagnetic shielding is also integrated into the electrode structure rather than being a separate component, reducing the total number of parts while maintaining sensing accuracy and electromagnetic interference protection.
3Extent of automation
If raw neuromuscular signals are sent to separate processing components, then signal processing is improved, but gesture recognition latency increases
Solution Approach 1:
By merging the signal-processing components with the electrode, the patent eliminates the time required to transmit signals over cables to external processing units. The processing occurs immediately at the electrode-site, reducing latency while maintaining full signal processing capability.
4Measurement precision
If wet electrodes with electrode gel are used, then signal quality is improved, but ease of operation deteriorates
Solution Approach 1:
The dry electrode design uses disposable or easily replaceable electrode surfaces that do not require gel application. The electrode incorporates conductive materials or coatings that provide sufficient signal quality without the need for messy gel application, making the system easier to use and more suitable for consumer products.
5Manufacturing precision
If rigid electrode structures are used, then manufacturing precision is improved, but comfort during extended wear deteriorates
Solution Approach 1:
The electrode incorporates flexible or deformable materials in its construction, allowing the rigid signal-processing components to be housed within a soft, comfortable exterior that can conform to the user's skin or wristband. This flexible shell approach maintains manufacturing precision for the internal components while providing comfort for extended wear.
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
Enhances user acceptance and reliability of in-air hand gestures by reducing latency and discomfort, improving the social acceptability and practicality of wearable devices for day-to-day use.
Implementation Method 1
The conductive deformable material is configured to deform while in contact with skin of a user
Implementation Method 2
The conductive deformable material is configured to provide the biometric signal to one or more electrical signal-processing components housed within the conductive deformable material
Data Source
AI summary
An example electrode configured to receive biometric signals is described herein. The electrode is constructed of a rigid structure coupled to electrical signal-processing components, wherein the electrical signal-processing components are configured to at least partially process received biometric signals. The electrode has a conductive deformable material that is adhered to the rigid structure and houses the electrical signal-processing components. The conductive deformable material is configured to deform while it is in contact with skin of a user. The conductive deformable material is also configured to: define an outer surface of the electrode that receives a biometric signal from the user, and provide the biometric signal to the electrical signal-processing components that are housed within the conductive deformable material for at least partially processing the biometric signal.