Abstract

This paper presents a long-range displacement measurement method by using a single-multi-single mode (SMS) fiber structure, attached to a flexible plate between two permanent poles and the optical time domain reflectometer (OTDR)-based interrogator. The SMS fiber structure sensors are prepared with two different configurations, i.e. straight and sinusoidal configurations. It is demonstrated that the displacement sensor can perform a displacement measurement with a range from 0 mm to 150 mm with a resolution of 0.159 mm. The sinusoidal configuration provides a better sensitivity than the straight configuration. The proposed sensor offers a low cost, and it can be implemented for quasi-distributed displacement measurement which is suitable for civil structure monitoring.

Original languageEnglish
Pages (from-to)166-171
Number of pages6
JournalPhotonic Sensors
Volume5
Issue number2
DOIs
Publication statusPublished - 1 Jun 2015

Keywords

  • Displacement sensor
  • OTDR
  • SMS fiber structure

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