Aircraft Evacuation Slide Readiness Indicator
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Solution Overview
Problem
Inflatable evacuation systems, such as those used in aircraft, may experience delayed or incomplete inflation, leading to safety concerns for passengers and crew, as they may not be ready for immediate use during emergencies.
Innovation Solution
An inflation sensor system that includes a readiness indicator module, a stretch sensor, a temperature sensor, and a controller. The system monitors real-time stretch and temperature data to determine the pressure within the inflatable and activates a readiness indicator once the inflatable is fully deployed and safely inflated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If fast inflation is achieved by using excess gas in the storage cylinder, then inflation speed is improved, but the risk of underinflation or overinflation increases
Solution Approach 1:
The patent employs stretch sensors that provide real-time feedback on the inflation status of the evacuation slide. This feedback mechanism allows the system to monitor the inflation process continuously and determine when the slide has reached its fully inflated state, thereby preventing both underinflation and overinflation while maintaining fast inflation speeds through the use of excess gas.
Solution Approach 2:
The patent replaces traditional mechanical pressure sensing mechanisms with stretch sensors that directly measure the physical deformation of the inflatable slide. This substitution provides more accurate and reliable detection of inflation status, enabling precise control of the inflation process while maintaining high speed.
2Loss of time
If inflation time is reduced for rapid evacuation, then response time is improved, but the accuracy of readiness indication deteriorates
Solution Approach 1:
The system uses stretch sensors to provide continuous real-time feedback during the inflation process, enabling accurate determination of inflation status even within reduced timeframes. The feedback mechanism allows the system to monitor and confirm full inflation completion rapidly and reliably.
Solution Approach 2:
The patent incorporates readiness indicator modules that are prepared and positioned in advance, allowing for immediate indication of inflation status as soon as the slide reaches full inflation. This preliminary preparation ensures that readiness can be communicated without delay once inflation is complete.
3Measurement precision
If stretch sensors are used to monitor inflation status, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent extracts the sensing function from complex mechanical pressure measurement systems and implements it through simpler stretch sensors that directly measure the deformation of the inflatable slide material. This extraction simplifies the overall system while maintaining or improving measurement accuracy.
Solution Approach 2:
The stretch sensors serve multiple functions: they monitor inflation status, detect full inflation completion, and provide data for readiness indication. This multi-functionality reduces the need for separate sensing systems, thereby reducing overall device complexity while maintaining measurement precision.
4Reliability
If readiness indication is provided only after complete inflation, then safety is improved, but loss of time increases
Solution Approach 1:
The continuous feedback from stretch sensors enables the system to detect and confirm full inflation completion immediately when it occurs, allowing for prompt readiness indication without compromising safety. The real-time monitoring ensures that the indication is provided as soon as the slide is ready, minimizing delay while maintaining safety standards.
Solution Approach 2:
The readiness indicator modules are pre-positioned and prepared to provide immediate indication once full inflation is detected. This preliminary preparation ensures that there is no delay in communicating readiness status to passengers and crew once the slide reaches its fully inflated state.
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
Ensures that the inflatable evacuation system is fully and safely inflated before indicating readiness for use, thereby enhancing passenger and crew safety during emergency evacuations.
Implementation Method 1
a stretch sensor configured for mounting to the inflatable and to provide a real-time stretch data of an elastic deformation of the inflatable
Implementation Method 2
a temperature sensor configured for mounting to the inflatable and to provide a real-time temperature data of the inflatable
Implementation Method 3
the controller includes a stretch-temperature database configured to compensate the real-time stretch data based on the real-time temperature data and to generate a compensated stretch signal
Implementation Method 4
a gas stored within a cylinder or tank at high pressure, which is discharged into the evacuation slide (or into an inflatable tube comprised within the evacuation slide) within a specific time period
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An inflation system for an inflatable includes a readiness indicator module (270); a stretch sensor (220) configured for mounting to the inflatable and to provide a real-time stretch data of an elastic deformation of the inflatable; and a controller (258) configured to receive the real-time stretch data and to transmit a control signal to the readiness indicator module (270) to indicate a deployed status of the inflatable.