Acoustic emission monitoring using two-wave mixing interferometer

Y. Zhu*, Oluwaseyi Balogun, Sridhar Krishnaswamy

*Corresponding author for this work

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

Abstract

An optical fiber Bragg grating (FBGs) based sensor system designed for the local detection of acoustic emissions (AE) in engineering structures is presented. The system uses an array of surface mounted FBG sensors, each with a spectral reflectivity in the C-band. The sensor responds to the local dynamic strain caused by propagating acoustic emissions by a shift in its spectral reflectivity spectrum, which is monitored with a two-wave mixing photorefractive interferometer based spectral demodulator. In this work, we present the results detailing the detection of high frequency AE responses on a metallic plate, specifically focusing on the FBG sensor sensitivity to the AE propagation distance. The frequency response of the sensor system to AE signals induced by pencil-lead breaks is evaluated.

Original languageEnglish (US)
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Pages1807-1811
Number of pages5
Volume1211
DOIs
StatePublished - Apr 1 2010
Event36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE - Kingston, RI, United States
Duration: Jul 26 2009Jul 31 2009

Other

Other36th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE
CountryUnited States
CityKingston, RI
Period7/26/097/31/09

Keywords

  • Acoustic emission monitoring
  • Fiber Bragg grating
  • Interferometer
  • Photorefractive

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Zhu, Y., Balogun, O., & Krishnaswamy, S. (2010). Acoustic emission monitoring using two-wave mixing interferometer. In Review of Progress in Quantitative Nondestructive Evaluation (Vol. 1211, pp. 1807-1811) https://doi.org/10.1063/1.3362301