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Sensors 2015, 15(10), 24914-24925; doi:10.3390/s151024914

Development of Metal-Ceramic Coaxial Cable Fabry-Pérot Interferometric Sensors for High Temperature Monitoring

1
Chemical Engineering Department, University of Cincinnati, Cincinnati, OH 45221, USA
2
Electrical and Computer Engineering Department, Clemson University, Clemson, SC 29634, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Ha Duong Ngo
Received: 4 August 2015 / Revised: 13 September 2015 / Accepted: 23 September 2015 / Published: 25 September 2015
(This article belongs to the Special Issue Sensors for Harsh Environments)
View Full-Text   |   Download PDF [2088 KB, uploaded 25 September 2015]   |  

Abstract

Metal-ceramic coaxial cable Fabry-Pérot interferometric (MCCC-FPI) sensors have been developed using a stainless steel tube and a stainless steel wire as the outer and inner conductors, respectively; a tubular α-alumina insulator; and a pair of air gaps created in the insulator along the cable to serve as weak reflectors for the transmitting microwave (MW) signal. The MCCC-FPI sensors have been demonstrated for high temperature measurements using MW signals in a frequency range of 2–8 GHz. The temperature measurement is achieved by monitoring the frequency shift (Δƒ) of the MW interferogram reflected from the pair of weak reflectors. The MW sensor exhibited excellent linear dependence of Δƒ on temperature; small measurement deviations (±2.7%); and fast response in a tested range of 200–500 °C. The MCCC has the potential for further developing multipoint FPI sensors in a single-cable to achieve in situ and continuous measurement of spatially distributed temperature in harsh environments. View Full-Text
Keywords: metal-ceramic; coaxial cable; Fabry-Pérot interferometer; sensor; high temperature metal-ceramic; coaxial cable; Fabry-Pérot interferometer; sensor; high temperature
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Trontz, A.; Cheng, B.; Zeng, S.; Xiao, H.; Dong, J. Development of Metal-Ceramic Coaxial Cable Fabry-Pérot Interferometric Sensors for High Temperature Monitoring. Sensors 2015, 15, 24914-24925.

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