Augmented Reality to Support On-Field Post-Impact Maintenance Operations on Thin Structures

This paper proposes an augmented reality (AR) strategy in which a Lamb waves based impact detection methodology dynamically interacts with a head portable visualization device allowing the inspector to see the estimated impact position (with its uncertainty) and impact energy directly on the plate-l...

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Veröffentlicht in:Journal of sensors 2013-01, Vol.2013 (2013), p.1-10
Hauptverfasser: De Marchi, Luca, Ceruti, Alessandro, Marzani, Alessandro, Liverani, Alfredo
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container_end_page 10
container_issue 2013
container_start_page 1
container_title Journal of sensors
container_volume 2013
creator De Marchi, Luca
Ceruti, Alessandro
Marzani, Alessandro
Liverani, Alfredo
description This paper proposes an augmented reality (AR) strategy in which a Lamb waves based impact detection methodology dynamically interacts with a head portable visualization device allowing the inspector to see the estimated impact position (with its uncertainty) and impact energy directly on the plate-like structure. The impact detection methodology uses a network of piezosensors bonded on the structure to be monitored and a signal processing algorithm (the Warped Frequency Transform) able to compensate for dispersion the acquired waveforms. The compensated waveforms yield to a robust estimation of Lamb waves difference in distance of propagation (DDOP), used to feed hyperbolic algorithms for impact location determination, and allow an estimation of the uncertainty of the impact positioning as well as of the impact energy. The outputs of the impact methodology are passed to a visualization technology that yielding their representation in Augmented Reality (AR) is meant to support the inspector during the on-field inspection/diagnosis as well as the maintenance operations. The inspector, in fact, can see interactively in real time the impact data directly on the surface of the structure. To validate the proposed approach, tests on an aluminum plate are presented. Results confirm the feasibility of the method and its exploitability in maintenance practice.
doi_str_mv 10.1155/2013/619570
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source EZB-FREE-00999 freely available EZB journals; Wiley Online Library (Open Access Collection); Alma/SFX Local Collection
subjects Algorithms
Augmented reality
Lamb waves
Maintenance
Methodology
Uncertainty
Visualization
Waveforms
title Augmented Reality to Support On-Field Post-Impact Maintenance Operations on Thin Structures
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