Signal processing enhanced fiber vibration sensors

Daniele Tosi, Massimo Olivero, Alberto Vallan, Guido Perrone

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The paper analyzes the feasibility of cost-effective fiber sensors for the measurement of small vibrations, from low to medium-high frequencies, in which the complexity of the measurement is moved from expensive optics to cheap electronics without losing too much performance thanks to signal processing algorithms. Two optical approaches are considered: Bragg gratings in standard telecom fibers, which represent the most common type of commercial fiber sensors, and specifically developed sensors made with plastic optical fibers. In both cases, to keep the overall cost low, vibrations are converted into variations of the light intensity, although this makes the received signal more sensitive to noise. Then, adaptive filters and advanced spectral estimation techniques are used to mitigate noise and improve the sensitivity. Preliminary results have demonstrated that the combined effect of these techniques can yield to a signal-to-noise improvement of about 30 dB, bringing the proposed approaches to the level of the most performing sensors for the measurement of vibrations.

Original languageEnglish
Title of host publicationMaterials and Applications for Sensors and Transducers II
PublisherTrans Tech Publications
Number of pages4
ISBN (Print)9783037856161
Publication statusPublished - 2013
Externally publishedYes
Event2nd International Conference on Materials and Applications for Sensors and Transducers, IC-MAST 2012 - Budapest, Hungary
Duration: May 24 2012May 28 2012

Publication series

NameKey Engineering Materials
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795


Other2nd International Conference on Materials and Applications for Sensors and Transducers, IC-MAST 2012


  • Fiber Bragg grating sensors
  • Plastic optical fibers
  • Signal processing
  • Vibration sensors

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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