Non-Contact Smartphone-Based Monitoring of Thermally Stressed Structures
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Título: | Non-Contact Smartphone-Based Monitoring of Thermally Stressed Structures |
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Autor/es: | Orak, Mehmet Sefa | Nasrollahi, Amir | Ozturk, Turgut | Mas, David | Ferrer, Belén | Rizzo, Piervincenzo |
Grupo/s de investigación o GITE: | Óptica y Ciencias de la Visión | Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES) |
Centro, Departamento o Servicio: | 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 |
Palabras clave: | Smartphone technology | Nondestructive testing | Structural health monitoring | Thermal stress | Neutral temperature | Computer vision |
Área/s de conocimiento: | Óptica | Mecánica de Medios Continuos y Teoría de Estructuras |
Fecha de publicación: | 18-abr-2018 |
Editor: | MDPI |
Cita bibliográfica: | Sefa Orak M, Nasrollahi A, Ozturk T, Mas D, Ferrer B, Rizzo P. Non-Contact Smartphone-Based Monitoring of Thermally Stressed Structures. Sensors. 2018; 18(4):1250. doi:10.3390/s18041250 |
Resumen: | The in-situ measurement of thermal stress in beams or continuous welded rails may prevent structural anomalies such as buckling. This study proposed a non-contact monitoring/inspection approach based on the use of a smartphone and a computer vision algorithm to estimate the vibrating characteristics of beams subjected to thermal stress. It is hypothesized that the vibration of a beam can be captured using a smartphone operating at frame rates higher than conventional 30 Hz, and the first few natural frequencies of the beam can be extracted using a computer vision algorithm. In this study, the first mode of vibration was considered and compared to the information obtained with a conventional accelerometer attached to the two structures investigated, namely a thin beam and a thick beam. The results show excellent agreement between the conventional contact method and the non-contact sensing approach proposed here. In the future, these findings may be used to develop a monitoring/inspection smartphone application to assess the axial stress of slender structures, to predict the neutral temperature of continuous welded rails, or to prevent thermal buckling. |
Patrocinador/es: | The first author was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) 2214/A International Doctoral Research Fellowship Programme (Grant #1059B141600085). Support for the second author came from the U.S. National Academy of Sciences Transit IDEA program, project T-86. |
URI: | http://hdl.handle.net/10045/74991 |
ISSN: | 1424-8220 |
DOI: | 10.3390/s18041250 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3390/s18041250 |
Aparece en las colecciones: | INV - IMAOS+V - Artículos de Revistas INV - GRESMES - Artículos de Revistas |
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