Comparison of alternatives to amplitude thresholding for onset detection of acoustic emission signals

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dc.contributor.authorBai, F.
dc.contributor.authorGagar, Daniel
dc.contributor.authorFoote, Peter
dc.contributor.authorZhao, Yifan
dc.date.accessioned2016-10-14T13:15:27Z
dc.date.available2016-10-14T13:15:27Z
dc.date.issued2016-10-10
dc.description.abstractAcoustic Emission (AE) monitoring can be used to detect the presence of damage as well as determine its location in Structural Health Monitoring (SHM) applications. Information on the time difference of the signal generated by the damage event arriving at different sensors in an array is essential in performing localisation. Currently, this is determined using a fixed threshold which is particularly prone to errors when not set to optimal values. This paper presents three new methods for determining the onset of AE signals without the need for a predetermined threshold. The performance of the techniques is evaluated using AE signals generated during fatigue crack growth and compared to the established Akaike Information Criterion (AIC) and fixed threshold methods. It was found that the 1D location accuracy of the new methods was within the range of <1–7.1%<1–7.1% of the monitored region compared to 2.7% for the AIC method and a range of 1.8–9.4% for the conventional Fixed Threshold method at different threshold levels.en_UK
dc.identifier.citationF. Bai, D. Gagar, P. Foote, Y. Zhao, Comparison of alternatives to amplitude thresholding for onset detection of acoustic emission signals, Mechanical Systems and Signal Processing, Volume 84, Part A, 1 February 2017, pp.717-730en_UK
dc.identifier.cris15166824
dc.identifier.issn0888-3270
dc.identifier.urihttp://dx.doi.org/10.1016/j.ymssp.2016.09.004
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/10759
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectOnset detectionen_UK
dc.subjectAcoustic emissionen_UK
dc.subjectStructural health monitoringen_UK
dc.titleComparison of alternatives to amplitude thresholding for onset detection of acoustic emission signalsen_UK
dc.typeArticleen_UK

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