Pneumatic Somatosensory Device Two-Stage Pulse Control
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Solution Overview
Problem
Existing pneumatic tactile stimulation devices suffer from sluggish rise times and imprecise waveforms, often requiring complex and costly designs with pressure sources that can interfere with sensory equipment operations.
Innovation Solution
A tactile stimulation device utilizing a high pressure fluid source, a low pressure fluid source, and a vacuum pressure source, with a pressure valve and vacuum valve that shift between positions to deliver a two-stage pulse of compressible fluid, minimizing interference and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a compressor motor is used to supply pressurized air pulses, then tactile stimulation can be achieved, but the rise time becomes sluggish and waveform precision deteriorates
Solution Approach 1:
The patent segments the pulse generation process into two distinct stages: a high-pressure stage for rapid pressure buildup (fast rise time) and a low-pressure stage for sustained pulse delivery (waveform precision). This is achieved by dividing the fluid source into high-pressure and low-pressure sources, each controlled by separate valves, allowing independent optimization of each stage's parameters.
Solution Approach 2:
The system performs preliminary action by pre-compressing fluid to high pressure before the actual stimulation pulse is needed. The high-pressure fluid source is prepared in advance and rapidly deployed at the onset of each pulse to achieve fast rise time, then transitions to low-pressure maintenance. This preliminary high-pressure preparation eliminates the sluggish rise time associated with continuous compressor operation.
2Measurement precision
If additional pressure sources are added to improve pulse delivery, then waveform precision improves, but device complexity and cost increase
Solution Approach 1:
The patent merges the high-pressure and low-pressure fluid sources into a single integrated system with a common fluid line and shared control architecture. The high-pressure and low-pressure sources are connected through a manifold system that allows seamless transition between pressure levels. This merging approach achieves waveform precision typically requiring multiple independent systems while maintaining a compact, cost-effective design with shared components.
Solution Approach 2:
The fluid delivery system is designed with multi-functionality, where the same fluid line and applicator can operate in both high-pressure mode (for rapid pulse initiation) and low-pressure mode (for sustained delivery). The system universally handles both pressure regimes through a single integrated pathway, eliminating the need for separate dedicated lines and reducing overall system complexity.
3Measurement precision
If pressure sources are placed closer to the application site to improve pulse delivery, then waveform precision improves, but interference with sensory equipment occurs
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a dual-pressure fluid delivery system that acts as a buffer between the pressure source and the application site. The high-pressure stage provides the necessary force for accurate pulse delivery, while the transition to low-pressure stage reduces the harmful interference effects. This intermediary pressure regulation allows precise waveform control without placing high-pressure sources directly near sensitive sensory equipment.
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 device achieves improved tactile stimulation with faster rise times and more precise waveforms, reducing the need for additional pressure sources and maintaining a cost-effective solution.
Implementation Method 1
deliver a two-stage pulse of compressible fluid
Data Source
AI summary
A device for providing tactile stimulation of a subject via a pulse of compressible fluid, typically for medical diagnostic and therapeutic applications. The device preferably includes a high pressure fluid source and a low pressure fluid source. A pressure valve selectively connects the pressure sources to an outlet conduit. The outlet conduit includes an applicator for directing pulses against the skin of a subject. The pulses may be applied via one applicator or a plurality of applicators, and may be applied in one pattern or several patterns at various application sites. A method of providing tactile stimulation is also disclosed.