Measurement of wide frequency range structural microvibrations with a pocket digital camera and sub-pixel techniques
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http://hdl.handle.net/10045/36195
Títol: | Measurement of wide frequency range structural microvibrations with a pocket digital camera and sub-pixel techniques |
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Autors: | Mas, David | Espinosa, Julián | Roig Hernández, Ana Belén | Ferrer, Belén | Pérez Rodríguez, Jorge | Illueca Contri, Carlos |
Grups d'investigació o GITE: | Óptica y Ciencias de la Visión | Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES) |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía | Universidad de Alicante. Departamento de Ingeniería Civil | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías |
Paraules clau: | Frequency range | Structural microvibrations | Pocket digital camera | Sub-pixel techniques |
Àrees de coneixement: | Óptica | Mecánica de Medios Continuos y Teoría de Estructuras |
Data de publicació: | de maig-2012 |
Editor: | Optical Society of America |
Citació bibliogràfica: | David Mas, Julian Espinosa, Ana B. Roig, Belen Ferrer, Jorge Perez, and Carlos Illueca, "Measurement of wide frequency range structural microvibrations with a pocket digital camera and sub-pixel techniques," Appl. Opt. 51, 2664-2671 (2012). doi:10.1364/AO.51.002664 |
Resum: | Analysis of vibrations and displacements is a hot topic in structural engineering. Although there is a wide variety of methods for vibration analysis, direct measurement of displacements in the mid and high frequency range is not well solved and accurate devices tend to be very expensive. Low-cost systems can be achieved by applying adequate image processing algorithms. In this paper, we propose the use of a commercial pocket digital camera, which is able to register more than 420 frames per second (fps) at low resolution, for accurate measuring of small vibrations and displacements. The method is based on tracking elliptical targets with sub-pixel accuracy. Our proposal is demonstrated at a 10 m distance with a spatial resolution of 0.15 mm. A practical application over a simple structure is given, and the main parameters of an attenuated movement of a steel column after an impulsive impact are determined with a spatial accuracy of 4 µm. |
Patrocinadors: | Financial support of the Spanish Ministerio de Ciencia e Innovacion through the project FIS2009-05639-ET and BIA2011-22704, the Generalitat Valenciana through the project PROMETEO/2011/021 and the University of Alicante through the project GRE10-09. A. B. Roig thanks the support of Cajamurcia. |
URI: | http://hdl.handle.net/10045/36195 |
ISSN: | 1559-128X (Print) | 2155-3165 (Online) |
DOI: | 10.1364/AO.51.002664 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | This paper was published in Applied Optics, and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ao/abstract.cfm?uri=ao-51-14-2664. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1364/AO.51.002664 |
Apareix a la col·lecció: | INV - IMAOS+V - Artículos de Revistas INV - GRESMES - Artículos de Revistas |
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2012_Mas_etal_ApplOpt.pdf | 618,67 kB | Adobe PDF | Obrir Vista prèvia | |
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