Fiber Bragg grating based sensing system

Early corrosion detection for structural health monitoring

C. H. Tan, Y. G. Shee, Boon Kar Yap, F. R.Mahamd Adikan

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Fiber optic sensors have been widely used in chemical and biomedical applications and are now being extended to structural health monitoring (SHM) in the civil engineering field. Due to the destructive nature of tests for corrosion monitoring, a non-destructive system was developed to monitor rebar corrosion via fiber Bragg grating (FBG). In this study, two different methods are proposed and tested; FBG with Polydimethylsiloxane (PDMS) coating and bare FBG. FBG sensors were embedded on the specimen to monitor the expansion strain caused by rebar corrosion, and their performances were monitored by observing the Bragg wavelength shift. A significant wavelength shift for the FBG without coating was observed on day 17, whereas for the PDMS coating, the significant wavelength shift occurred on day 10. This proves that PDMS coated FBGs have a higher sensitivity for corrosion detection as compared to non-coated ones. The overall results of both methods after etching have shown a good linear response. Strain induced by the corrosion shows good linear response as corrosion rate increased. Corrosion rate were calculated from the conventional weight loss measurement method. These sensors can be installed for real-time and non-destructive SHM monitoring in civil engineering.

Original languageEnglish
Pages (from-to)123-128
Number of pages6
JournalSensors and Actuators, A: Physical
Volume246
DOIs
Publication statusPublished - 01 Aug 2016

Fingerprint

structural health monitoring
Structural health monitoring
Fiber Bragg gratings
Bragg gratings
corrosion
Corrosion
Polydimethylsiloxane
fibers
Civil engineering
Corrosion rate
Coatings
Wavelength
coatings
shift
sensors
Monitoring
Sensors
Fiber optic sensors
wavelengths
engineering

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

Cite this

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Fiber Bragg grating based sensing system : Early corrosion detection for structural health monitoring. / Tan, C. H.; Shee, Y. G.; Yap, Boon Kar; Adikan, F. R.Mahamd.

In: Sensors and Actuators, A: Physical, Vol. 246, 01.08.2016, p. 123-128.

Research output: Contribution to journalArticle

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