An experimental study of the feasibility of phase‐based video magnification for damage detection and localisation in operational deflection shapes

Simple item page
dc.contributor.authorCivera, Marco
dc.contributor.authorZanotti Fragonara, Luca
dc.contributor.authorSurace, Cecilia
dc.date.accessioned2020-03-17T09:00:34Z
dc.date.available2020-03-17T09:00:34Z
dc.date.issued2019-01-08
dc.description.abstractOptical measurements from high‐speed, high‐definition video recordings can be used to define the full‐field dynamics of a structure. By comparing the dynamic responses resulting from both damaged and undamaged elements, structural health monitoring can be carried out, similarly as with mounted transducers. Unlike the physical sensors, which provide point‐wise measurements and a limited number of output channels, high‐quality video recording allows very spatially dense information. Moreover, video acquisition is a noncontact technique. This guarantees that any anomaly in the dynamic behaviour can be more easily correlated to damage and not to added mass or stiffness due to the installed sensors. However, in real‐life scenarios, the vibrations due to environmental input are often so small that they are indistinguishable from measurement noise if conventional image‐based techniques are applied. In order to improve the signal‐to‐noise ratio in low‐amplitude measurements, phase‐based motion magnification has been recently proposed. This study intends to show that model‐based structural health monitoring can be performed on modal data and time histories processed with phase‐based motion magnification, whereas unamplified vibrations would be too small for being successfully exploited. All the experiments were performed on a multidamaged box beam with different damage sizes and angles.en_UK
dc.identifier.citationCivera M, Zanotti Fragonara L, Surace C. (2020) An experimental study of the feasibility of phase‐based video magnification for damage detection and localisation in operational deflection shapes. Strain, Volume 56, Issue 1, February 2020, Article number e12336en_UK
dc.identifier.issn0039-2103
dc.identifier.urihttps://doi.org/10.1111/str.12336
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15292
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectdamage detectionen_UK
dc.subjectexperimental modal analysisen_UK
dc.subjectmotion magnificationen_UK
dc.subjectstructural health monitoringen_UK
dc.subjectvideo processingen_UK
dc.titleAn experimental study of the feasibility of phase‐based video magnification for damage detection and localisation in operational deflection shapesen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
operational_deflection_shapes-2020.pdf
Size:
1.24 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)