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Article

Engineering Graphics for Thermal Assessment: 3D Thermal Data Visualisation Based on Infrared Thermography, GIS and 3D Point Cloud Processing Software

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Research Group ‘TEP970: Innovación Tecnológica, Sistemas de Modelado 3D y Diagnosis Energética en Patrimonio y Edificación’, Departamento de Expresión Gráfica e Ingeniería en la Edificación, Escuela Técnica Superior de Ingeniería de Edificación, Universidad de Sevilla, 4A Reina Mercedes Avenue, 41012 Seville, Spain
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The Creative and Virtual Technologies Research Laboratory, School of Architecture, Design and the Built Environment, Nottingham Trent University, 50 Shakespeare Street, Nottingham NG1 4FQ, UK
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Departamento de Ingeniería Gráfica, Universidad de Sevilla, 41092 Seville, Spain
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Instituto Geográfico Nacional—Servicio Regional en Andalucía, 41013 Seville, Spain
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Author to whom correspondence should be addressed.
Academic Editors: Sergei D. Odintsov and José Rojas Sola
Symmetry 2021, 13(2), 335; https://doi.org/10.3390/sym13020335
Received: 2 January 2021 / Revised: 11 February 2021 / Accepted: 16 February 2021 / Published: 18 February 2021
(This article belongs to the Special Issue Advances on Engineering Graphics: Improvements and New Proposals)
Engineering graphics are present in the design stage, but also constitute a way to communicate, analyse, and synthesise. In the Architecture-Engineering-Construction sector, graphical data become essential in analysing buildings and constructions throughout their lifecycles, such as in the thermal behaviour assessment of building envelopes. Scientific research has addressed the thermal image mapping onto three-dimensional (3D) models for visualisation and analysis. However, the 3D point cloud data creation of buildings’ thermal behaviour directly from rectified infrared thermography (IRT) thermograms is yet to be investigated. Therefore, this paper develops an open-source software graphical method to produce 3D thermal data from IRT images for temperature visualisation and subsequent analysis. This low-cost approach uses both a geographic information system for the thermographic image rectification and the point clouds production, and 3D point cloud processing software. The methodology has been proven useful to obtain, without perspective distortions, 3D thermograms even from non-radiometric raster images. The results also revealed that non-rectangular thermograms enable over 95% of the 3D thermal data generated from IRT against rectangular shapes (over 85%). Finally, the 3D thermal data produced allow further thermal behaviour assessment, including calculating the object’s heat loss and thermal transmittance for diverse applications such as energy audits, restoration, monitoring, or product quality control. View Full-Text
Keywords: 3D thermal data; 3D thermograms; point cloud data; visualisation; temperature; heat loss; infrared thermography; GIS; 3D point cloud processing software; engineering graphics 3D thermal data; 3D thermograms; point cloud data; visualisation; temperature; heat loss; infrared thermography; GIS; 3D point cloud processing software; engineering graphics
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MDPI and ACS Style

Antón, D.; Amaro-Mellado, J.-L. Engineering Graphics for Thermal Assessment: 3D Thermal Data Visualisation Based on Infrared Thermography, GIS and 3D Point Cloud Processing Software. Symmetry 2021, 13, 335. https://doi.org/10.3390/sym13020335

AMA Style

Antón D, Amaro-Mellado J-L. Engineering Graphics for Thermal Assessment: 3D Thermal Data Visualisation Based on Infrared Thermography, GIS and 3D Point Cloud Processing Software. Symmetry. 2021; 13(2):335. https://doi.org/10.3390/sym13020335

Chicago/Turabian Style

Antón, Daniel, and José-Lázaro Amaro-Mellado. 2021. "Engineering Graphics for Thermal Assessment: 3D Thermal Data Visualisation Based on Infrared Thermography, GIS and 3D Point Cloud Processing Software" Symmetry 13, no. 2: 335. https://doi.org/10.3390/sym13020335

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