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Title: Development of metal-ceramic coaxial cable Fabry-Pérot interferometric sensors for high temperature monitoring

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:
 [1] ;  [2] ;  [1] ;  [2] ;  [1]
  1. Univ. of Cincinnati, Cincinnati, OH (United States)
  2. Clemson Univ., Clemson, SC (United States)
Publication Date:
Grant/Contract Number:
FE0022993
Type:
Accepted Manuscript
Journal Name:
Sensors
Additional Journal Information:
Journal Volume: 15; Journal Issue: 10; Journal ID: ISSN 1424-8220
Publisher:
MDPI AG
Research Org:
Univ. of Cincinnati, Cincinnati, OH (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION metal-ceramic; coaxial cable; Fabry-Pérot interferometer; sensor; high temperature
OSTI Identifier:
1239302
Alternate Identifier(s):
OSTI ID: 1239302