Nitrox Production Machine Feedback Control
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Solution Overview
Problem
Current Nitrox-mixtures production machines have unstable behavior during transient states and require continuous human supervision to maintain the desired oxygen percentage in the Nitrox mixture, leading to inefficiencies and waste.
Innovation Solution
A Nitrox-mixtures production machine equipped with an electronic control device that implements feedback control of the control valve based on signals from an oxygen sensor, automatically regulating the flowrate to maintain the target oxygen percentage and stabilize the machine's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If feedback control is implemented using oxygen sensor signals, then the stability and precision of oxygen percentage regulation is improved, but the device complexity increases
Solution Approach 1:
The patent implements feedback control by using signals from an oxygen sensor to automatically regulate the control valve, creating a closed-loop system that continuously monitors and adjusts the oxygen percentage in the Nitrox mixture to maintain the desired setpoint
Solution Approach 2:
The patent replaces manual mechanical supervision with an automated electronic control system that uses electrical signals from the oxygen sensor to actuate the control valve, eliminating the need for continuous human intervention
2Reliability
If continuous human supervision is used to maintain oxygen percentage, then the reliability of mixture composition is improved, but the loss of time and productivity deteriorate
Solution Approach 1:
The system performs self-regulation by automatically monitoring the oxygen percentage through the sensor and adjusting the control valve without requiring external human intervention, making the system self-sufficient in maintaining composition reliability
Solution Approach 2:
The automated feedback control system continuously monitors and adjusts the mixture composition, replacing the need for continuous human supervision and eliminating the time loss associated with manual monitoring
3Productivity
If automated feedback control is implemented, then the productivity is improved by reducing human supervision needs, but the device complexity increases
Solution Approach 1:
The feedback control system automatically regulates the oxygen percentage by using sensor signals to adjust the control valve, eliminating the need for continuous human supervision and thereby improving productivity
Solution Approach 2:
The patent replaces manual operational complexity with automated electronic control, where the electronic control system handles the complexity of continuous regulation, freeing human operators to focus on higher-level tasks
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 electronic control system minimizes instability during transients, allowing for quicker achievement of the desired Nitrox mixture composition, reducing the need for continuous human supervision and minimizing waste by automatically adjusting the oxygen percentage.
Implementation Method 1
signals from an oxygen sensor
Implementation Method 2
a semi-permeable membrane molecular separator, which is capable to separate nitrogen from oxygen by exploiting the fact that nitrogen molecules are larger than oxygen molecules
Implementation Method 3
a low-pressure compressor that feeds a flow of air with a pressure of 8-10 bar into the molecular separator
Implementation Method 4
an electric heater, which is placed between the low-pressure compressor and the molecular separator, and is adapted to heat up the flow of pressurised air directed towards the molecular separator
Data Source
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AI summary
Nitrox-mixtures production machine (1) comprising: a molecular separator (2), which is structured so as to receive at inlet a flow of air and to provide at outlet an intermediate Nitrox mixture with high oxygen percentage; a low-pressure compressor (3), which is adapted to feed an airflow at inlet of the molecular separator (2); a mixing manifold (4), which communicates with the molecular separator (2) so as to receive said intermediate Nitrox mixture, and is structured so as to mix the intermediate Nitrox mixture with fresh air coming from the outside, in order to provide at outlet a final Nitrox mixture with predefined composition; at least one oxygen sensor (5), which is adapted to measure the oxygen percentage present in said final Nitrox mixture; at least one pressure sensor (7), which is adapted to measure the air pressure in the molecular separator (2); and an electronic control device (6), which is connected to said at least one oxygen sensor (5) and is adapted to regulate the flowrate of the airflow that is sucked in by the low-pressure compressor (3) based on the signals coming from said at least one oxygen sensor (5) and said at least one pressure sensor (7).