High speed image techniques for construction safety net monitoring in outdoor conditions

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Title: High speed image techniques for construction safety net monitoring in outdoor conditions
Authors: Ferrer, Belén | Pomares Torres, Juan Carlos | Irles Más, Ramón | Espinosa, Julián | Mas, David
Research Group/s: Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES) | Óptica y Ciencias de la Visión
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía
Keywords: Construction safety net | High speed camera | Image processing techniques
Knowledge Area: Mecánica de Medios Continuos y Teoría de Estructuras | Óptica
Issue Date: 1-May-2012
Publisher: SPIE, The International Society for Optics and Photonics
Citation: Belen Ferrer, Juan C. Pomares, Ramón Irles, Julian Espinosa, David Mas, "High speed image techniques for construction safety net monitoring in outdoor conditions," Proc. SPIE 8436, Optics, Photonics, and Digital Technologies for Multimedia Applications II, 84361B (1 May 2012). doi:10.1117/12.922732
Abstract: The behaviour of a construction safety net and its supporting structure was monitored with a high speed camera and image processing techniques. A 75 kg cylinder was used to simulate a falling human body from a higher location in a sloped surface of a building under construction. The cylinder rolled down over a ramp until it reaches the net. The behaviour of the net and its supporting structure was analysed through the movement of the cylinder once it reaches the net. The impact was captured from a lateral side with a high speed camera working at 512 frames per second. In order to obtain the cylinder position each frame of the sequence was binarized. Through morphological image processing the contour of the cylinder was isolated from the background and with a Hough transform the presence of the circle was detected. With this, forces and accelerations applying on the net and the supporting structure have been described, together with the trajectory of the cylinder. All the experiment has been done in a real structure in outdoors location. Difficulties found in the preparation on the experiment and in extracting the final cylinder contour are described and some recommendations are giving for future implementations.
Sponsor: The authors acknowledge the financial support of the Spanish Ministerio de Ciencia e lnnovación through the project BIA2011-22704 and the University of Alicante through the project GRE10-09.
URI: http://hdl.handle.net/10045/77040
ISBN: 9780819491282
ISSN: 0277-786X | 1996-756X (Online)
DOI: 10.1117/12.922732
Language: eng
Type: info:eu-repo/semantics/conferenceObject
Rights: Copyright 2012 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 8436, and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Peer Review: si
Publisher version: https://doi.org/10.1117/12.922732
Appears in Collections:INV - IMAOS+V - Comunicaciones a Congresos, Conferencias, etc.
INV - GRESMES - Comunicaciones a Congresos, Conferencias, etc.

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