Inverted Ampoule Leak Detection for Pyrophoric Payloads
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Solution Overview
Problem
Current methods for testing sealed ampoules in ammunition rounds for air leaks, such as pressure decay and helium leak testing, are either unsafe or cost-prohibitive, as they can lead to premature pyrophoric reactions and high costs respectively.
Innovation Solution
The method involves assembling and testing ampoules in an inverted orientation within an air-free, inert environment, using a detection component to monitor light or heat energy from a pyrophoric payload when exposed to air, to detect leaks between the body and base portions, allowing for safer and more cost-effective leak detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure decay testing is used to detect air leaks in ampoules, then leak detection capability is improved, but the risk of premature pyrophoric reaction increases
Solution Approach 1:
The ampoule is inverted during testing so that the pyrophoric payload remains at the closed end away from the seal interface. This inversion prevents pressurized air from directly contacting the pyrophoric material even if a leak is present, eliminating the hazard while maintaining leak detection capability through lateral monitoring of the gap region
Solution Approach 2:
A gap is introduced as an intermediary space between the pyrophoric payload and the seal interface. This gap acts as a buffer zone that allows leak detection monitoring while preventing direct contact between pressurized air and the pyrophoric material, thus mediating between the need for leak detection and the need to prevent premature reaction
2Measurement precision
If helium leak testing is used to detect air leaks in ampoules, then measurement accuracy is improved, but testing cost increases
Solution Approach 1:
The invention replaces expensive helium gas with inexpensive ambient air for leak testing. By using air instead of helium and implementing lateral monitoring of the gap region, the system achieves effective leak detection without the prohibitive costs associated with helium procurement and handling
Solution Approach 2:
The testing approach changes from using helium-rich atmosphere to using ambient air pressure. This parameter change in the testing medium, combined with the inverted orientation and lateral gap monitoring, maintains measurement capability while dramatically reducing testing costs by eliminating helium usage
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
This approach enhances sensitivity, accuracy, and reduces the risk of premature reactions by maintaining the pyrophoric payload in an unreacted state until intentional rupture, while also minimizing personnel interaction and reducing costs associated with helium usage.
Implementation Method 1
detect light or heat energy from a reaction between air and the pyrophoric payload
Implementation Method 2
detect light or heat energy from a reaction between air and the pyrophoric payload
Implementation Method 3
the pyrophoric payload configured to react with environmental air upon impact
Data Source
AI summary
The present technology is generally directed to assembling and testing ampoules, and associated systems, devices, and methods. Each ampoule can include a body portion configured to carry a marking material within an interior of the body portion, and a base portion configured to couple to the body portion to seal the interior of the body portion. The ampoules can be assembled and/or tested in an inverted orientation. In the inverted orientation, the ampoule can include a gap between the marking material and the base portion. For example, the ampoule can be positioned within a leak detection system and the ampoule's gap can be aligned with one or more leak detection components configured to analyze the gap for leak-related indicia.