Distributed multi-point fiber optic acoustic emission SHM system for condition management of aircraft structures

Edgar Mendoza*, John Prohaska, Connie Kempen, Yan Esterkin, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

Acoustic emission is the leading structural health monitoring technique use for the early warning detection of structural damage in advanced aircraft structures associated with impacts, fatigue, cracks, fractures, corrosion, and delaminations. This paper describes progress towards the development and qualification of a distributed fiber optic acoustic emission sensor (FAESense™) system based on the use of a novel adaptive and dynamic reconfigure two-wave mixing (TWM) interferometer produced on a photonic integrated circuit (PIC) microchip. The FAESense system uses a distributed array of miniature and minimally invasive fiber Bragg grating sensors, embedded or surface mounted on a composite or metal aircraft structure, used for the detection and localization of acoustic emission events associated with structural damage. The TWM interferometer interrogates the status of the array of FBG sensors and demodulates the small wavelength shifts of the FBG sensors associated with the detection of acoustic emission waves in the presence of quasi-static strain and temperature variation effects. The FAESense™ system represents a new, robust and reliable, technology that can be used for the remote structural health monitoring and prognostics of a large number of aircraft SHM applications.

Original languageEnglish (US)
StatePublished - Jan 1 2018
Event9th European Workshop on Structural Health Monitoring, EWSHM 2018 - Manchester, United Kingdom
Duration: Jul 10 2018Jul 13 2018

Conference

Conference9th European Workshop on Structural Health Monitoring, EWSHM 2018
CountryUnited Kingdom
CityManchester
Period7/10/187/13/18

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture

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