A field deployable, multiplexed Bragg grating sensor system used in an extensive highway bridge monitoring evaluation tests

Y. M. Gebremichael, W. Li, B. T. Meggitt, W. J.O. Boyle, K. T.V. Grattan, B. McKinley, L. F. Boswell, K. A. Aarnes, S. E. Aasen, B. Tynes, Y. Fonjallaz, T. Triantafillou

Research output: Contribution to journalArticle

Abstract

A multiplexed optical fiber Bragg grating sensor system with a measurement bandwidth of up to 200 Hz enabling dynamic loading events, e.g., road traffic, to be observed has been designed, installed, and tested over an 18-month period on a 346-m road bridge in Norway, for design verification and structural integrity monitoring purposes. A network of 32 fiber Bragg sensors was surface bonded along with a corresponding set of resistive strain gauges for comparative tests to be made. The wavelength data were calibrated against two thermally stabilized (∼0.15 pm) reference gratings, which rejected common mode noise and provided absolute wavelength scaling. These data provides independent strain and temperature information. Long-term test results showed good linearity and repeatability of < 10 με over the test period with a precision of ±5 με and a resolution of ±1 με. The readings from the FBG sensors were comparable to those from the foil gauge sensors to within ±4 με.

Original languageEnglish (US)
Pages (from-to)510-519
Number of pages10
JournalIEEE Sensors Journal
Volume5
Issue number3
DOIs
StatePublished - Jun 2005

Keywords

  • Bragg grating
  • Sensor multiplexing
  • Structural integrity monitoring

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'A field deployable, multiplexed Bragg grating sensor system used in an extensive highway bridge monitoring evaluation tests'. Together they form a unique fingerprint.

  • Cite this

    Gebremichael, Y. M., Li, W., Meggitt, B. T., Boyle, W. J. O., Grattan, K. T. V., McKinley, B., Boswell, L. F., Aarnes, K. A., Aasen, S. E., Tynes, B., Fonjallaz, Y., & Triantafillou, T. (2005). A field deployable, multiplexed Bragg grating sensor system used in an extensive highway bridge monitoring evaluation tests. IEEE Sensors Journal, 5(3), 510-519. https://doi.org/10.1109/JSEN.2005.846185