Wearable Vibration Device for Tactile Sensitivity via Stochastic Resonance
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Solution Overview
Problem
Many stroke survivors experience significant sensory deficits, particularly in the hand, leading to discriminatory sensory loss that affects dexterity and fine motor functions due to reduced tactile sensory feedback.
Innovation Solution
A wearable device that applies a vibrating force remotely to areas such as the arm, wrist, or proximal finger segments using a vibrating element, actuator, and control circuitry to increase tactile sensitivity by determining and adjusting the vibration magnitude based on the user's tactile sensory threshold, leveraging the phenomenon of stochastic resonance to enhance sensory input detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wearable device applies a vibrating force remotely to increase tactile sensitivity, then the tactile sensitivity of the fingertip is improved, but the device complexity increases
Solution Approach 1:
The patent uses an intermediary vibrating element applied to a proximal body part (arm, wrist, or hand) rather than directly to the fingertip. This mediator transmits vibratory stimuli through the body to enhance fingertip tactile sensitivity, avoiding the need for direct fingertip stimulation while achieving the desired sensory enhancement effect.
Solution Approach 2:
The patent replaces complex mechanical stimulation systems with a simple vibratory mechanism. By using a vibrating element that can be easily actuated, the system achieves tactile sensitivity enhancement without requiring complex mechanical structures, thereby reducing device complexity while maintaining effectiveness.
2Ease of operation
If the vibrating element is positioned remotely from the fingertip, then the ease of operation is improved, but the loss of information deteriorates
Solution Approach 1:
The patent shifts the stimulation location from the traditional one-dimensional approach (direct fingertip contact) to a multi-dimensional approach by applying vibration to proximal body parts (arm, wrist, hand). This dimensional shift allows the vibratory energy to propagate through the body's neural and mechanical pathways, maintaining rich tactile information while improving ease of operation.
Solution Approach 2:
The system incorporates feedback mechanisms to monitor and adjust the vibratory stimulation based on the user's tactile detection. This feedback loop ensures that even though the vibrating element is positioned remotely, the system can optimize the stimulation parameters to maintain adequate tactile sensory feedback information, preventing information loss.
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 wearable device effectively increases tactile sensitivity of the fingertips, allowing users to better detect tactile stimuli, thereby improving dexterity and motor functions by reducing the sensory threshold and enhancing sensory feedback without the need for direct stimulation near the fingertips.
Implementation Method 1
activating the vibrating element to apply a vibrating force
Implementation Method 2
leveraging the phenomenon of stochastic resonance to enhance sensory input detection
Data Source
AI summary
A method increases a tactile sensitivity of a fingertip of a user with a wearable device. The wearable device includes a vibrating element, an actuator for receiving user input, and a control circuitry. The method includes positioning the vibrating element on one of a user's arm, wrist, hand, or proximal finger segment and activating the vibrating element to apply a vibrating force at a first magnitude. The method also includes receiving user input indicating that the user detected movement of the vibrating element at the first magnitude and applying the vibrating force at a second magnitude, the second magnitude being lower than the first magnitude, to increase the tactile sensitivity of at least one fingertip of the user.