title: Development of Metal-Ceramic Coaxial Cable Fabry-Pérot Interferometric Sensors for High Temperature Monitoring.
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.
authors.affiliation: Chemical Engineering Department, University of Cincinnati, Cincinnati, OH 45221, USA. trontzam@mail.uc.edu.
authors.forename: Adam
authors.initials: A
authors.lastname: Trontz
authors.affiliation: Electrical and Computer Engineering Department, Clemson University, Clemson, SC 29634, USA. baokaic@g.clemson.edu.
authors.forename: Baokai
authors.initials: B
authors.lastname: Cheng
authors.affiliation: Chemical Engineering Department, University of Cincinnati, Cincinnati, OH 45221, USA. zengsn@mail.uc.edu.
authors.forename: Shixuan
authors.initials: S
authors.lastname: Zeng
authors.affiliation: Electrical and Computer Engineering Department, Clemson University, Clemson, SC 29634, USA. haix@clemson.edu.
authors.forename: Hai
authors.initials: H
authors.lastname: Xiao
authors.affiliation: Chemical Engineering Department, University of Cincinnati, Cincinnati, OH 45221, USA. junhang.dong@uc.edu.
authors.forename: Junhang
authors.initials: J
authors.lastname: Dong
keywords: Fabry-Pérot interferometer; coaxial cable; high temperature; metal-ceramic; sensor