Development of novel optical fiber sensors for measuring tilts and displacements of geotechnical structures

Hua Fu Pei, Jianhua Yin, Wei Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

42 Citations (Scopus)

Abstract

Two kinds of innovative sensors based on optical fiber sensing technologies have been proposed and developed for measuring tilts and displacements in geotechnical structures. The newly developed tilt sensors are based on classical beam theory and were successfully used to measure the inclinations in a physical model test. The conventional inclinometers including in-place and portable types, as a key instrument, are very commonly used in geotechnical engineering. In this paper, fiber Bragg grating sensing technology is used to measure strains along a standard inclinometer casing and these strains are used to calculate the lateral and/or horizontal deflections of the casing using the beam theory and a finite difference method. Finally, the monitoring results are verified by laboratory tests.
Original languageEnglish
Article number095202
JournalMeasurement Science and Technology
Volume24
Issue number9
DOIs
Publication statusPublished - 1 Jan 2013

Keywords

  • beam theory
  • fiber Bragg grating (FBG)
  • finite difference method
  • inclinometer
  • tilt sensor

ASJC Scopus subject areas

  • Instrumentation
  • Applied Mathematics

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