Artificial Respiration Simulator for CO2 Presence Detection Testing
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Solution Overview
Problem
Existing CO2-based detection systems for detecting human presence in enclosed spaces, such as vehicles, struggle to accurately simulate the exchange of gases due to the complex interaction of inhalation and exhalation, particularly in hot conditions, and are often hindered by high costs and complexity of existing simulation methods.
Innovation Solution
A cost-effective simulator that replicates the inhalation and exhalation activities of infants and children using a compressible breather bulb and collapsible exhale gas reservoir, simulating gas exchange by displacing gas volumes and mimicking natural convection, with a body-heat generator to simulate realistic CO2 distribution in enclosed spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex simulation methods are used to accurately simulate gas exchange, then measurement precision is improved, but device complexity increases and cost increases
Solution Approach 1:
The patent uses a simplified artificial respiration system that copies the essential gas exchange function of human breathing without replicating the full biological complexity. The system uses a reservoir bag, flow control valves, and CO2 generation to mimic inhalation and exhalation patterns, achieving adequate simulation accuracy while avoiding the complexity of using live subjects or highly complex mechanical respiratory systems
Solution Approach 2:
The patent employs inexpensive, easily replaceable components such as reservoir bags, flow control valves, and temporary CO2 sources that can be quickly set up and discarded after testing. This approach allows multiple test runs without significant cost accumulation and avoids the need for expensive, complex equipment that would require maintenance and calibration
2Measurement precision
If complex simulation methods are used to accurately simulate gas exchange, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent employs inexpensive, easily replaceable components such as reservoir bags, flow control valves, and temporary CO2 sources that can be quickly set up and discarded after testing. This approach allows multiple test runs without significant cost accumulation and avoids the need for expensive, complex equipment that would require maintenance and calibration
Solution Approach 2:
The system uses passive CO2 generation methods and natural convection currents to distribute gas without requiring expensive active pumping systems or complex control mechanisms. The reservoir bag naturally expands and contracts based on pressure differential, and CO2 generation occurs through simple chemical reactions or temperature changes, eliminating the need for costly powered components
3Measurement precision
If live human subjects are used for testing, then measurement precision is improved, but ethical concerns and safety risks increase
Solution Approach 1:
The patent uses a simplified artificial respiration system that copies the essential gas exchange function of human breathing without replicating the full biological complexity. The system uses a reservoir bag, flow control valves, and CO2 generation to mimic inhalation and exhalation patterns, achieving adequate simulation accuracy while avoiding the complexity of using live subjects or highly complex mechanical respiratory systems
Solution Approach 2:
The patent introduces an artificial respiration system as an intermediary between the detection system being tested and the need for actual human subjects. This intermediary provides a safe, controllable source of CO2 emissions that can be precisely regulated and eliminated after testing, removing the ethical and safety concerns associated with exposing live infants or children to hot enclosed environments
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
Accurately simulates gas exchange in enclosed spaces, providing a realistic challenge for CO2-based detection systems, while being economical and operationally feasible, thus validating the performance of these systems without using live human subjects.
Implementation Method 1
simulating gas exchange by displacing gas volumes and mimicking natural convection
Implementation Method 2
with a body-heat generator to simulate realistic CO2 distribution in enclosed spaces
Data Source
AI summary
A system to simulate breathing by a human occupant of an enclosed structure, such as vehicle, for testing, validating and verifying operation of CO2-based human presence detection systems, having a doll with dimensions corresponding to a specific human age, size, or both; a compressible breather bulb having an interior gas volume corresponding to a single breath gas volume corresponding to the specific human; an exhale gas reservoir which is collapsible at ambient atmospheric pressure; valves to control the movement of the exhale gas; wherein the reservoir collapses as gas is exhaled to simulate exchanging of gas during inhales and exhales.