Simultaneous load and temperature measurement using Lophine-coated fiber Bragg gratings

A. K. Singh, Y. Zhu, Ming Han, H. Huang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This paper presents a single fiber Bragg grating (FBG) sensor that is capable of measuring the axial load and temperature simultaneously. The FBG sensor is coated with a block of recrystallized Lophine, which introduces the bandwidth modulation of the FBG reflectance spectrum. Thermal-mechanical testing of the Lophine-coated FBG sensor under different load and temperature combinations was carried out. It was discovered that the FBG bandwidth is linearly proportional to the applied load and temperature. By fitting the measured FBG bandwidths and central Bragg wavelengths as linear functions of the axial load and temperature, we demonstrated that the axial load and temperature can be inversely determined from the measured reflectance spectrum of a single Lophine-coated FBG sensor. The measurement errors for the axial load and the temperature were found to be ±4 gm and ±4 °C, respectively.

Original languageEnglish (US)
Article number115019
JournalSmart Materials and Structures
Volume25
Issue number11
DOIs
StatePublished - Oct 18 2016

Fingerprint

Fiber Bragg gratings
Temperature measurement
Bragg gratings
temperature measurement
axial loads
Axial loads
fibers
sensors
Sensors
bandwidth
Bandwidth
Temperature
temperature
reflectance
Mechanical testing
lophine
Measurement errors
Modulation
modulation
Wavelength

Keywords

  • Bragg wavelength
  • Lophin
  • fiber Bragg grating (FBG)
  • optical fiber sensor
  • spectrum bandwidth
  • strain sensor
  • temperature sensor

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

Cite this

Simultaneous load and temperature measurement using Lophine-coated fiber Bragg gratings. / Singh, A. K.; Zhu, Y.; Han, Ming; Huang, H.

In: Smart Materials and Structures, Vol. 25, No. 11, 115019, 18.10.2016.

Research output: Contribution to journalArticle

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