Arm-Wearable Neuromuscular Sensor With Shared Reference Electrode
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Solution Overview
Problem
Current wearable devices for sensing neuromuscular signals are often bulky, uncomfortable, and inefficient due to the need for multiple sensors, which can lead to lost signal information and reduced accuracy in predicting motor actions.
Innovation Solution
The use of a shared reference electrode in an arm-wearable device that reduces the number of electrodes required, allowing for a more compact and comfortable design while detecting neuromuscular signals in both widthwise and radial directions, enhancing signal accuracy and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are used to detect neuromuscular signals, then measurement precision is improved, but device complexity and weight increase
Solution Approach 1:
The patent combines multiple sensing functions into a single integrated wearable structure that detects neuromuscular signals along both widthwise and radial directions simultaneously. The wearable structure integrates multiple electrodes and sensing channels into one unified device, reducing the number of separate sensors needed while maintaining comprehensive signal detection capability.
Solution Approach 2:
The wearable structure is designed to perform multiple sensing functions using a single device. It can detect neuromuscular signals in multiple directions (widthwise and radial), predict multiple types of motor actions, and interface with various artificial-reality environments, thereby reducing the need for specialized sensors for each function.
2Measurement precision
If multiple sensors are used to detect neuromuscular signals, then measurement precision is improved, but weight of moving object increases
Solution Approach 1:
The patent merges multiple sensing capabilities into a single lightweight wearable structure, eliminating the need for multiple separate heavy sensors. The integrated design detects signals in multiple directions using shared electrodes and processing circuitry, significantly reducing overall device weight while maintaining comprehensive monitoring capability.
3Device complexity
If sensors are arranged to detect signals in one direction, then device complexity is reduced, but loss of information increases
Solution Approach 1:
The patent transitions from single-direction signal detection to multi-directional detection by arranging electrodes and sensing channels to detect neuromuscular signals along both widthwise and radial directions of the wearable structure. This two-dimensional sensing approach captures comprehensive signal information without significantly increasing device complexity.
4Measurement precision
If more sensors are used, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent merges multiple sensing functions into a single comfortable wearable structure that users can wear continuously. The integrated design with shared electrodes and streamlined processing reduces the bulk and complexity perceived by the user, improving ease of operation and social acceptability while maintaining high measurement precision through multi-directional signal detection.
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 approach results in a lighter, more socially acceptable wearable device that provides accurate and efficient neuromuscular signal detection, improving user interaction with artificial-reality environments and reducing false positives.
Implementation Method 1
a first electrode at a first portion of the interior surface to form a first channel for detecting neuromuscular signals and a second electrode at a second portion, distinct from the first portion, of the interior surface to form a second channel for detecting neuromuscular signals
Data Source
AI summary
An arm-wearable device for sensing neuromuscular signals using a shared reference electrode that is shared between two or more electrodes is provided. The arm-wearable device includes a structure configured to be worn by a user, the structure having an interior surface configured to contact a user's skin when the arm-wearable device is donned by the user. The arm-wearable device includes a first electrode, a second electrode, and a shared reference electrode, each electrode contacts the user's skin above respective neuromuscular pathways of the user when the wearable structure is worn by the user. The first and second electrodes detect neuromuscular signals and the shared reference electrode detects a reference neuromuscular signal. The arm-wearable device includes circuitry configured to compare the neuromuscular signals and the reference neuromuscular signal to determine a motor action that the user intends to perform with their hand.