Wearable Limb Activation System for Amputee Arm Swing Coordination
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Solution Overview
Problem
Individuals with major arm amputations or congenital limb differences often fail to swing their remaining arm while walking, leading to asymmetry and increased risk of falling, as existing prosthetic technologies do not actively encourage arm swing during walking.
Innovation Solution
A wearable limb activation system that includes sensors to detect walking or running movements, a processor to generate activation signals, and a sensory stimulator or motorized prosthetic limb to remind users to swing their arm in synchrony with their leg swing, using vibration, pressure, or auditory cues for below-elbow amputees and motorized elbow or shoulder movement for above-elbow amputees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing prosthetic technologies are used, then the prosthetic limb can be controlled, but arm swing during walking is not actively encouraged and symmetry is not restored
Solution Approach 1:
The system uses sensors to detect leg swing motion and provides feedback through sensory stimulators or motorized actuation to coordinate arm swing automatically, creating a closed-loop control system that adapts to the user's walking cadence
Solution Approach 2:
The system enables the prosthetic limb to swing automatically based on detected leg motion without requiring manual control from the user, allowing the system to serve itself by autonomously coordinating arm movement during walking
2Reliability
If no arm swing occurs in amputees, then prosthetic control is simple, but asymmetry increases fall risk and reduces aesthetics
Solution Approach 1:
Sensory stimulators use vibration to alert the user to swing their arm, providing tactile feedback that encourages arm movement without requiring complex mechanical actuation systems
Solution Approach 2:
The system dynamically adjusts arm swing activation based on detected walking cadence and leg motion, adapting the prosthetic limb movement to match the user's natural walking rhythm rather than using fixed mechanical patterns
3Ease of operation
If sensory stimulators are used to alert users, then arm swing can be encouraged, but additional components increase device complexity
Solution Approach 1:
The sensory stimulators serve multiple functions: they alert the user to swing their arm, provide tactile feedback during walking, and can coordinate with motorized actuation, reducing the need for separate specialized components
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
Restores arm swing symmetry, improving aesthetics and balance during walking, thereby reducing the likelihood of falls and associated injuries, enhancing the quality of life for amputees.
Implementation Method 1
The sensor can include an accelerometer, a magnetometer, and/or a gyroscope
Implementation Method 2
The sensor can include an accelerometer, a magnetometer, and/or a gyroscope
Implementation Method 3
The sensor can include an accelerometer, a magnetometer, and/or a gyroscope
Implementation Method 4
the sensory stimulator can be a vibration stimulator, a pressure stimulator, a skin stretching stimulator, or an auditory stimulator
Data Source
AI summary
A limb activation system includes a sensor configured to monitor movement of a user. The system also includes a processor operatively coupled to the sensor and configured to determine, based on the movement of the user, that the user is engaged in walking or running. The processor is also configured to generate an activation signal responsive to the determination that the user is engaged in walking or running. A data-based model integrates sensor information to drive activation and arm swing of the affected upper limb.