Pressure-Responsive Fluidic Valve for Haptic Feedback Control
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Solution Overview
Problem
Conventional microfluidic systems lack effective mechanisms for providing haptic feedback and fluidic control, limiting their application in fields like biomedical, chemical, and haptic technologies.
Innovation Solution
The development of fluidic valves with elastic membranes that block and unblock output flow based on pressure thresholds, creating a vibrotactor effect for haptic feedback and fluidic control, which can be integrated into various systems such as artificial and virtual reality devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional microfluidic systems are used, then basic fluid flow is achieved, but haptic feedback capability is lacking
Solution Approach 1:
The patent combines the fluidic valve and elastic membrane into a single integrated unit that simultaneously performs fluid control and haptic feedback generation. The elastic membrane is positioned within the valve structure such that pressure-induced deformation of the membrane both regulates fluid flow and creates tactile feedback, merging two functions into one component.
Solution Approach 2:
The elastic membrane serves multiple functions: it acts as a pressure-sensitive element for valve operation, a diaphragm for fluid separation, and a haptic feedback actuator. This multi-functionality allows the system to provide both fluidic control and tactile feedback without requiring separate dedicated components for each function.
2Adaptability or versatility
If elastic membrane is added for haptic feedback, then feedback capability is improved, but device complexity increases
Solution Approach 1:
The patent employs an elastic membrane as a flexible thin film that responds to pressure changes by deforming and vibrating. This flexible element provides haptic feedback through its mechanical response to fluid pressure variations, enabling tactile feedback without complex mechanical actuators or additional feedback systems.
Solution Approach 2:
The elastic membrane automatically generates haptic feedback through its inherent elastic properties when subjected to pressure changes during normal valve operation. No external feedback control system or additional energy input is required - the membrane's natural response to pressure differential provides the tactile feedback signal.
3Stress or pressure
If restricting region blocks output flow, then pressure control is improved, but fluid flow rate decreases
Solution Approach 1:
The restricting region is designed to dynamically adjust its flow restriction based on chamber pressure. At low pressures, the elastic membrane remains relatively flat and allows greater flow. As pressure increases, the membrane deforms and restricts flow, automatically regulating pressure without completely blocking flow under normal operating conditions.
Solution Approach 2:
The valve utilizes pressure-induced changes in the elastic membrane's physical state (deformation, curvature, stiffness) to modulate flow restriction. This allows the system to maintain pressure control while permitting adequate flow rates through the dynamic adjustment of the restricting region's effective opening area.
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
Enables efficient fluidic control and actuation, providing haptic feedback through periodic pressure changes, enhancing user experience in applications like augmented and virtual reality systems.
Implementation Method 1
an elastic membrane that is positioned over the outlet port and at least a portion of the chamber such that the elastic membrane blocks at least a portion of the output flow when pressure in the chamber is below a threshold level. The elastic membrane may include an inner surface configured to, when the pressure in the chamber reaches the threshold level, deform in a manner that unblocks the portion of the output flow
Implementation Method 2
Periodic increases and decreases to pressure within the chamber may cause the elastic membrane to vibrate and function as a vibrotactor
Data Source
AI summary
The disclosed computer-implemented method may include a fluidic device comprising a chamber, an inlet port coupled to the chamber and configured to convey fluid to the chamber, and an outlet port coupled to the chamber and configured to convey the fluid from the chamber. The fluidic device may also have a restricting region that (1) is dimensioned to restrict a flow of the fluid through the outlet port when the pressure in the chamber is below a threshold level and (2) is configured to move in a manner that allows a flow rate of the fluid through the outlet port to increase when pressure in the chamber reaches the threshold level.