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Scanner of dynamic deflections (SCADD) : a new approach for field data acquisition of the vibration of civil structures

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Show simple item record Fernández Fernández, José Luis Comesaña Piñeiro, Rafael Trillo Yáñez, María Cristina Fernández Doval, Ángel Manuel Deán Ben, José Luis 2016-06-02T07:10:42Z 2016-06-02T07:10:42Z 2008-06-04
dc.description.abstract We describe a novel instrument for the remote measurement of dynamic deflection shapes of structures several tens of meters long, based on geometrical optics techniques with scanned laser illumination, which we have named Scanner of Dynamic Deflections (SCADD). A set of aligned control points is measured in each scan, each point being defined by a retroreflector attached to the structure. By measuring the delay of the optical signal reflected from each point, the system renders a component of the displacement of that point which is transverse to the illumination direction. The intended application of SCADD is the field data acquisition for diagnosing the structural health of civil infrastructures, either as a stand-alone instrument or integrated in a non-destructive structure testing system comprising several data sources, typically an array of accelerometers and a SCADD unit. The foreseen measurement accuracy and the spatial and temporal sampling density of SCADD are adequate to the application of modal analysis techniques. For the purpose of locating our proposal in its technological context, we include firstly a brief description of the most usual methods (optical and non-optical) for the field measurement of vibrations of civil structures. Then, the SCADD principle of measurement and architecture are detailed. In the experimental section we describe a SCADD prototype and a series of measurements of a control point located 18 m away from the SCADD head, from which we extract the repeatability and a calibration curve of the prototype. Finally, the main advantages of SCADD are detailed. spa
dc.description.sponsorship Universidad de Vigo | Ref. I608122F64102 spa
dc.language.iso eng spa
dc.title Scanner of dynamic deflections (SCADD) : a new approach for field data acquisition of the vibration of civil structures spa
dc.type conferenceObject spa
dc.rights.accessRights openAccess spa
dc.identifier.doi 10.1117/12.803002
dc.identifier.editor spa
dc.publisher.departamento Física aplicada spa
dc.publisher.departamento Enxeñaría dos materiais, mecánica aplicada e construción spa
dc.conferenceObject.type Comunicación extensa internacional spa
dc.identifier.conferenceObject Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, Ancona, Italia, 17-20 junio 2008 spa
dc.identifier.conference spa
dc.publisher.grupoinvestigacion Grupo de Metroloxía Óptica spa
dc.publisher.grupoinvestigacion Aplicacións Industriais dos Láseres spa
dc.subject.unesco 3311.11 Instrumentos Opticos spa
dc.subject.unesco 2209.06 Óptica Geométrica spa
dc.subject.unesco 3305.06 Ingeniería Civil spa 2016-05-31T22:09:31Z

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