Aircraft Oxygen Supply System with Automatic Decompression Mode Switching
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Solution Overview
Problem
Current oxygen supply systems for aircraft pilots are inadequate for prolonged use and lack flexibility, particularly in high-altitude conditions, where pilots must prepare for decompression situations without disturbing normal operations or compromising safety.
Innovation Solution
An oxygen supply system with a preventive oxygen supply mode that includes a personalized dispensing unit, cabin altitude detection, and a control device capable of switching between pre-wear, pre-oxygenation, and decompression modes, automatically activating emergency oxygen supply when necessary, ensuring continuous and safe oxygenation without relying on rigidly installed masks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigidly installed emergency oxygen masks are used for prolonged preventive oxygen supply, then oxygen supply reliability is improved, but pilot comfort and hygiene deteriorate
Solution Approach 1:
The system divides the oxygen supply function into two independent parts: a reusable rigid emergency oxygen system for safety-critical situations, and a disposable flexible preventive oxygen system for comfort and hygiene. The disposable unit can be easily replaced between flights, eliminating contamination issues while maintaining reliable oxygen supply capability.
Solution Approach 2:
The system performs preliminary oxygen supply preparation by providing a pre-configured disposable oxygen unit that is ready for immediate use. This unit can be connected in advance and provides oxygen through flexible tubing, allowing the pilot to prepare for potential decompression events without compromising comfort or hygiene during extended periods.
2Device complexity
If manual switching between oxygen modes is required, then system complexity is reduced, but response time to decompression events increases
Solution Approach 1:
The system incorporates automatic detection of cabin altitude and decompression conditions, with feedback mechanisms that trigger the appropriate oxygen supply mode without pilot intervention. Sensors monitor environmental parameters and automatically activate the emergency oxygen system when decompression is detected, eliminating manual switching delays while maintaining manageable system complexity through standardized control architecture.
3Reliability
If preventive oxygen supply is activated at high altitude, then pilot safety is improved, but oxygen consumption increases
Solution Approach 1:
The system provides oxygen supply in periodic or demand-based intervals rather than continuous flow, activating oxygen delivery only when decompression conditions are detected or during specific high-altitude operations. This periodic activation maintains pilot safety by providing oxygen when needed while significantly reducing overall oxygen consumption compared to continuous supply modes.
Data Source
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AI summary
The present invention relates to an oxygen supply system (1) for providing an adequate oxygen supply mode in an aircraft, having a preventive oxygen supply system (2) comprising an oxygen source (20);a preventive oxygen dispensing unit (21) being connectable to said oxygen source (20); a cabin altitude detection device (23); and a preventive oxygen control device (22) being adapted to provide at least the following modes: a pre-wear mode for providing no oxygen of said oxygen source (20) to said preventive oxygen dispensing unit (21) but normal cabin air; a pre-oxygenation mode for providing a predetermined rate of oxygen of said oxygen source (20) to said preventive oxygen dispensing unit (21) being sufficient for generating a pre-oxygenation condition of the user; and a decompression mode for providing high concentrated oxygen of said oxygen source (20) to said preventive oxygen dispensing unit (21) being sufficient for ensuring a minimum oxygenation of the user; wherein said preventive oxygen control device (22) automatically switches to the decompression mode in case a predetermined cabin altitude threshold is detected by said cabin altitude detection device (23). Further, the present invention relates to a respective method for providing an adequate oxygen supply mode using such an oxygen supply system (1).