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Intelligent Chemical Sensor Systems for In-space Safety ApplicationsFuture in-space and lunar operations will require significantly improved monitoring and Integrated System Health Management (ISHM) throughout the mission. In particular, the monitoring of chemical species is an important component of an overall monitoring system for space vehicles and operations. For example, in leak monitoring of propulsion systems during launch, inspace, and on lunar surfaces, detection of low concentrations of hydrogen and other fuels is important to avoid explosive conditions that could harm personnel and damage the vehicle. Dependable vehicle operation also depends on the timely and accurate measurement of these leaks. Thus, the development of a sensor array to determine the concentration of fuels such as hydrogen, hydrocarbons, or hydrazine as well as oxygen is necessary. Work has been on-going to develop an integrated smart leak detection system based on miniaturized sensors to detect hydrogen, hydrocarbons, or hydrazine, and oxygen. The approach is to implement Microelectromechanical Systems (MEMS) based sensors incorporated with signal conditioning electronics, power, data storage, and telemetry enabling intelligent systems. The final sensor system will be self-contained with a surface area comparable to a postage stamp. This paper discusses the development of this "Lick and Stick" leak detection system and it s application to In-Space Transportation and other Exploration applications.
Document ID
Document Type
Conference Paper
Hunter, G. W. (NASA Glenn Research Center Cleveland, OH, United States)
Xu, J. C. (NASA Glenn Research Center Cleveland, OH, United States)
Neudeck, P. G. (NASA Glenn Research Center Cleveland, OH, United States)
Makel, D. B. (Makel Engineering, Inc. Chico, CA, United States)
Ward, B. (Makel Engineering, Inc. Chico, CA, United States)
Liu, C. C. (Case Western Reserve Univ. Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
July 9, 2006
Subject Category
Chemistry and Materials (General)
Report/Patent Number
Meeting Information
2006 AIAA 42nd Joint Propulsion Conference(Sacramento, CA)
Funding Number(s)
WBS: WBS 095240.
Distribution Limits
Public Use Permitted.

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