Self-Powered Oxygen Flow Indicator Using Bernoulli and Seebeck Effects

Solution Overview

Problem

Current oxygen mask flow indication systems are mechanical and prone to failure, requiring separate power systems and being inefficient in weight and space, especially in critical applications like aircraft and medical settings where reliability and low-light visibility are crucial.

Innovation Solution

A flow indicator device that generates energy using the movement of oxygen through carbon nanotubes and semiconductors, employing Bernoulli's principle and the Seebeck effect to power illumination devices, such as LEDs or OLEDs, for immediate and reliable visual indication of gas flow, and alternative systems using oxygen-sensitive photoluminescent dyes for detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If mechanical flow indication devices are used, then flow indication is provided, but reliability deteriorates due to jamming and breakage

Engineering Contradiction:

Improveflow indication reliabilityVSAvoidmechanical system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces mechanical flow indication systems with an optical system using LEDs or other light sources that are activated by oxygen flow. This substitution eliminates moving parts, mechanical joints, and complex mechanical structures that are prone to jamming and breakage, thereby significantly improving reliability while maintaining the flow indication function.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention employs a self-powered illumination system where the oxygen flow itself activates the light source through a flow-sensitive element. The system uses the kinetic energy of the flowing oxygen to power the indicator, eliminating the need for external power sources, batteries, or complex electrical systems, thus simplifying the overall device structure while improving reliability.

Inventive Principle:

Principle #25Self-service

2Illumination intensity

If separate power systems are added for illumination, then visibility is improved, but weight increases

Engineering Contradiction:

Improveflow indication visibilityVSAvoidsystem weight

Core Design Contradiction:

Illumination intensityVSWeight of moving object

Solution Approach 1:

The patent implements a self-powered illumination system where the oxygen flow itself activates the light source through a flow-sensitive element. The system uses the kinetic energy of the flowing oxygen to power the indicator, eliminating the need for external power sources, batteries, or complex electrical systems, thus simplifying the overall device structure while improving reliability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The invention utilizes the pneumatic energy of the oxygen flow directly to activate the illumination system. A flow-sensitive element responds to the kinetic energy of the moving oxygen gas, converting it into mechanical or electrical signal that triggers the light source, thereby using the fluid itself as the power source rather than requiring separate power systems.

Inventive Principle:

Principle #29Pneumatics and hydraulics

3Reliability

If mechanical flow indicators are used, then flow detection is achieved, but space consumption increases

Engineering Contradiction:

Improveflow detection capabilityVSAvoidindicator device volume

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent replaces mechanical flow indication systems with an optical system using LEDs or other light sources that are activated by oxygen flow. This substitution eliminates moving parts, mechanical joints, and complex mechanical structures that are prone to jamming and breakage, thereby significantly improving reliability while maintaining the flow indication function.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention may employ thin-film flow-sensitive elements or flexible membranes that respond to oxygen flow by changing optical properties or triggering light emission. These thin-film structures occupy minimal space while providing reliable flow detection and indication capabilities.

Inventive Principle:

Principle #30Flexible shells and thin films

4Illumination intensity

If traditional illumination systems are used, then visual indication is provided, but power consumption increases

Engineering Contradiction:

Improveflow indication brightnessVSAvoidpower consumption

Core Design Contradiction:

Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The patent implements a self-powered illumination system where the oxygen flow itself activates the light source through a flow-sensitive element. The system uses the kinetic energy of the flowing oxygen to power the indicator, eliminating the need for external power sources, batteries, or complex electrical systems, thus simplifying the overall device structure while improving reliability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The invention employs flow-sensitive elements that change their physical or chemical parameters in response to oxygen flow, such as resistance, capacitance, or optical properties. These parameter changes trigger the illumination system, allowing the device to operate only when needed (when flow is present) rather than consuming power continuously, thereby reducing overall power consumption.

Inventive Principle:

Principle #35Parameter changes

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

Provides a lightweight, reliable, and efficient means to indicate oxygen flow, reducing power consumption and weight, with rapid response times and long functional lifetimes, ensuring consistent operation in emergency conditions.

Implementation Method 1

By employing Bernoulli's principle coupled with the Seebeck effect, a measurable voltage and current can be generated by utilizing a flow of a gas over a layer of doped silicon/germanium, applied to single/multiwall carbon nanotubes

Methodology Applied

Scientific EffectSeebeck effect: Seebeck Effect

Implementation Method 2

Using a clamp, multi-part system, or insert with an angle incident to the direction of flow, the moving gas induces a pressure differential (and consequently temperature differential) that in turn generates a voltage/current

Methodology Applied

Scientific EffectBernoulli's principle: Bernoulli Effect

Implementation Method 3

Certain gases, such as oxygen, may be detected using a photo luminescent dye with indicating results via an OLED

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Data Source

PatentUS10016632B2Oxygen flow indicator using flow-powered illumination

Publication Date: 2018.07.10 BE AEROSPACE INC

AI summary

A flow indicator of a breathing apparatus that indicates a flow of a breathing-gas includes a structure within a conduit for delivering the breathable gas, where the structure undergoes a change as a result of a presence of the breathable gas or a movement of the breathable gas past the structure. The flow indicator also includes a gas flow display that is actuated by the change in the structure to visually indicate a presence or flow of the breathable gas, where the display is powered by the change in the structure without any outside power supply.