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Acoustic emission source location using a distributed feedback fiber laser rosette

Sensors (Basel, Switzerland), 2013-10, Vol.13 (10), p.14041-14054 [Peer Reviewed Journal]

Copyright MDPI AG 2013 ;2013 by the authors; licensee MDPI, Basel, Switzerland. 2013 ;ISSN: 1424-8220 ;EISSN: 1424-8220 ;DOI: 10.3390/s131014041 ;PMID: 24141266

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Title:
Acoustic emission source location using a distributed feedback fiber laser rosette
Author: Huang, Wenzhu ; Zhang, Wentao ; Li, Fang
Subjects: acoustic emission ; Acoustics - instrumentation ; autocorrelation ; DFB fiber laser rosette ; directional sensitivity ; Equipment Design ; Equipment Failure Analysis ; Feedback ; Fiber Optic Technology - instrumentation ; Lasers ; location algorithm ; Photoacoustic Techniques - instrumentation ; Refractometry - instrumentation ; Scattering, Radiation ; Sound ; Sound Spectrography - instrumentation ; Transducers ; wavelet packet energy
Is Part Of: Sensors (Basel, Switzerland), 2013-10, Vol.13 (10), p.14041-14054
Description: This paper proposes an approach for acoustic emission (AE) source localization in a large marble stone using distributed feedback (DFB) fiber lasers. The aim of this study is to detect damage in structures such as those found in civil applications. The directional sensitivity of DFB fiber laser is investigated by calculating location coefficient using a method of digital signal analysis. In this, autocorrelation is used to extract the location coefficient from the periodic AE signal and wavelet packet energy is calculated to get the location coefficient of a burst AE source. Normalization is processed to eliminate the influence of distance and intensity of AE source. Then a new location algorithm based on the location coefficient is presented and tested to determine the location of AE source using a Delta (Δ) DFB fiber laser rosette configuration. The advantage of the proposed algorithm over the traditional methods based on fiber Bragg Grating (FBG) include the capability of: having higher strain resolution for AE detection and taking into account two different types of AE source for location.
Publisher: Switzerland: MDPI AG
Language: English
Identifier: ISSN: 1424-8220
EISSN: 1424-8220
DOI: 10.3390/s131014041
PMID: 24141266
Source: GFMER Free Medical Journals
MEDLINE
PubMed Central
ROAD: Directory of Open Access Scholarly Resources
ProQuest Central
DOAJ Directory of Open Access Journals

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Acoustic emission source location using a distributed feedback fiber laser rosette

Copyright MDPI AG 2013 ;2013 by the authors; licensee MDPI, Basel, Switzerland. 2013 ;ISSN: 1424-8220 ;EISSN: 1424-8220 ;DOI: 10.3390/s131014041 ;PMID: 24141266

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