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20 April 2010 Fiber optic oxygen sensor using fluorescence quenching for aviation industry
Allen Panahi
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Proceedings Volume 7675, Photonics in the Transportation Industry: Auto to Aerospace III; 76750K (2010) https://doi.org/10.1117/12.865981
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States
Abstract
Comprised of heavier hydrocarbon components, jet fuel is much less volatile, with Jet A having a flash point of approximately 100°F and JP-4 having a flash point of approximately 0°F. In contrast, straight-run gasoline has a flash point of approximately -40°F. The flash point is the minimum temperature where a liquid fuel can generate enough vapor to form a flammable mixture with air. If the temperature is below the flash point there isn't enough fuel evaporating to form a flammable fuel-air mixture. Since jet fuel and gasoline have similar flammable concentration limits, gasoline must produce much more vapor at a given temperature to have such a low flash point; hence gasoline is much more volatile than jet fuel. In this paper we explore Fluorescence Technology as applied to the design and development of O2 sensors that can be used for this application and discuss the various test and measurement techniques used to estimate the O2 gas concentration. We compare the various intensity based approaches and contrast them with the frequency domain techniques that measure phase to extract fluorescent lifetimes. The various inerting fuel tank requirements are explained and finally a novel compact measurement system using that uses the frequency heterodyning cross correlation technique that can be used for various applications is described in detail while the benefits are explored together with some test data collected.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Allen Panahi "Fiber optic oxygen sensor using fluorescence quenching for aviation industry", Proc. SPIE 7675, Photonics in the Transportation Industry: Auto to Aerospace III, 76750K (20 April 2010); https://doi.org/10.1117/12.865981
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