Mechanical Vestibular Stimulator Actuator Design
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Solution Overview
Problem
Individuals with damaged vestibular systems face challenges in maintaining balance and stability due to the lack of natural stimulation from electrical prostheses, which can lead to vertigo, dizziness, and clumsiness.
Innovation Solution
A mechanical vestibular stimulator apparatus that includes an actuator configured to stimulate semicircular canals, controlled by a module that generates signals for adjustable frequency, amplitude, and duration, using various actuators such as pistons, elastic membranes, or balloons to mimic natural motion and amplify endolymph movement, thereby stimulating hair cells in the vestibular system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical stimulation is used to stimulate the vestibular system, then the vestibular nerve can be activated to provide balance control, but the stimulation lacks a natural feel and makes adaptation difficult
Solution Approach 1:
The patent replaces electrical stimulation with mechanical stimulation. The actuator mechanically pushes or pulls on the semicircular canal to stimulate the vestibular system, substituting the mechanical action for electrical stimulation. This mechanical approach naturally activates the hair cells and vestibular nerve, providing a more natural feel and easier adaptation while maintaining balance control reliability
2Reliability
If electrical electrodes are implanted to stimulate vestibular nerve ganglion cells, then reflexive responses can be enabled for balance maintenance, but the peripheral vestibular system's hair cells are not actuated
Solution Approach 1:
The patent uses the semicircular canal as an intermediary structure. Instead of directly stimulating the vestibular nerve ganglion cells with electrodes, the actuator mechanically stimulates the semicircular canal, which then transmits the mechanical energy to the endolymph and hair cells, naturally activating them and enabling both balance maintenance and hair cell actuation
3Reliability
If mechanical actuators are used to stimulate semicircular canals, then natural motion amplification can be achieved, but device complexity increases
Solution Approach 1:
The patent changes the physical state and parameters of the actuator to simplify the system. By using a balloon actuator that can be inflated and deflated, the system transforms complex mechanical movements into simple volume changes. This parameter change approach maintains the ability to amplify natural motion signals while reducing overall device complexity
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 mechanical stimulator effectively amplifies natural motion signals, providing more robust stimulation to the vestibular system, potentially improving balance and stability by mimicking the body's natural response to motion, thus alleviating symptoms like vertigo and dizziness.
Implementation Method 1
the actuator comprises a piezoelectric mechanical vibrator, the vibrator being configured to be displaced in response to a control signal
Implementation Method 2
the actuator comprises an elastic membrane, the elastic membrane being configured to expand in response to a control signal
Data Source
AI summary
An apparatus to stimulate the vestibular system of an individual. The apparatus comprises an actuator configured to mechanically stimulate a semicircular canal, and a control module coupled to the actuator that controls the actuator in response to motion information associated with the individual.