Description

In this study, a fiber optic sensing system based on long period fiber gratings (LPFG) in LP06 and LP07 modes is designed, fabricated and tested for simultaneous measurements of strain, temperature and corrosion-induced mass loss. It consists of three steel tubes and several Fe-C coated LPFG sensors for long- and short-term corrosion monitoring, respectively, when deployed in proximity and parallel to a steel member. Graphene/silver nanowire (Gr/AgNW) composite was coated on the LPFG surface for efficient Fe-C electroplating due to its high optical transparency and conductivity. The sensor was subjected to both tensile strain and temperature, and submerged in 3.5 wt.% NaCl for 72 hours during corrosion tests. The results showed high accuracy and sensitivity of the integrated sensor.

Start Date

8-14-2018 7:45 AM

End Date

8-14-2018 5:00 PM

Meeting Name

INSPIRE-UTC 2018 Annual Meeting

Department(s)

Civil, Architectural and Environmental Engineering

Comments

Financial support for this INSPIRE UTC project is provided by the U.S. Department of Transportation, Office of the Assistant Secretary for Research and Technology (USDOT/OST-R) under Grant No. 69A3551747126 through INSPIRE University Transportation Center (http://inspire-utc.mst.edu) at Missouri University of Science and Technology.

Document Type

Poster

Document Version

Final Version

File Type

text

Language(s)

English

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Aug 14th, 7:45 AM Aug 14th, 5:00 PM

Integrated Fiber Optic Sensors for Strain, Temperature and Corrosion-Induced Mass Loss Measurement

In this study, a fiber optic sensing system based on long period fiber gratings (LPFG) in LP06 and LP07 modes is designed, fabricated and tested for simultaneous measurements of strain, temperature and corrosion-induced mass loss. It consists of three steel tubes and several Fe-C coated LPFG sensors for long- and short-term corrosion monitoring, respectively, when deployed in proximity and parallel to a steel member. Graphene/silver nanowire (Gr/AgNW) composite was coated on the LPFG surface for efficient Fe-C electroplating due to its high optical transparency and conductivity. The sensor was subjected to both tensile strain and temperature, and submerged in 3.5 wt.% NaCl for 72 hours during corrosion tests. The results showed high accuracy and sensitivity of the integrated sensor.