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Development and Application of Microfabricated Chemical Gas Sensors For Aerospace ApplicationsAerospace applications require the development of chemical sensors with capabilities beyond those of commercially available sensors. In particular, factors such as minimal sensor size, weight, and power consumption are particularly important. Development areas which have potential aerospace applications include launch vehicle leak detection, engine health monitoring and control, and fire detection. Sensor development for these applications is based on progress in three types of technology: 1) Micromachining and microfabrication (Microsystem) technology to fabricate miniaturized sensors. 2) The use of nanocrystalline materials to develop sensors with improved stability combined with higher sensitivity. 3) The development of high temperature semiconductors, especially silicon carbide. Sensor development for each application involves its own challenges in the fields of materials science and fabrication technology. This paper discusses the needs of space applications and the point-contact sensor technology being developed to address these needs. Sensors to measure hydrogen, hydrocarbons, nitrogen oxides (Nox, carbon monoxide, oxygen, and carbon dioxide are being developed. A description is given of each sensor type and its present stage of development. Demonstration and application these sensor technologies will be described. The demonstrations range from use of a microsystem based hydrogen sensor on the Shuttle to engine demonstration of a nanocrystalline based sensor for NO, detection. It is concluded that microfabricated sensor technology has significant potential for use in a range of aerospace applications.
Document ID
20050212186
Document Type
Preprint (Draft being sent to journal)
Authors
Hunter, G. W. (NASA Glenn Research Center Cleveland, OH, United States)
Neudeck, P. G. (NASA Glenn Research Center Cleveland, OH, United States)
Fralick, G. (NASA Glenn Research Center Cleveland, OH, United States)
Thomas, V. (Ohio Aerospace Inst. Cleveland, OH, United States)
Liu, C. C. (Case Western Reserve Univ. Cleveland, OH, United States)
Wu, Q. H. (Case Western Reserve Univ. Cleveland, OH, United States)
Sawayda, M. S. (Case Western Reserve Univ. Cleveland, OH, United States)
Jin, A. (Case Western Reserve Univ. Cleveland, OH, United States)
Hammond, J. (Case Western Reserve Univ. Cleveland, OH, United States)
Makel, D. (Makel Engineering, Inc. Chico, CA, United States)
Hall, G. (NASA Kennedy Space Center Cocoa Beach, FL, United States)
Date Acquired
August 23, 2013
Publication Date
January 14, 1990
Subject Category
Mechanical Engineering
Funding Number(s)
PROJECT: RTOP 245-82-26
Distribution Limits
Public
Copyright
Other