Engineering graphics for thermal assessment: 3D thermal data visualisation based on infrared thermography, GIS and 3D point cloud processing software

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Antón, D ORCID: https://orcid.org/0000-0002-4267-2433 and Amaro-Mellado, J-L, 2021. Engineering graphics for thermal assessment: 3D thermal data visualisation based on infrared thermography, GIS and 3D point cloud processing software. Symmetry, 13 (2): 335. ISSN 2073-8994

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Official URL: https://doi.org/10.3390/sym13020335

Abstract

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.

Item Type:	Journal article
Publication Title:	Symmetry
Creators:	Antón, D. and Amaro-Mellado, J.-L.
Publisher:	MDPI AG
Date:	18 February 2021
Volume:	13
Number:	2
ISSN:	2073-8994
Identifiers:	Number Type 10.3390/sym13020335 DOI 1442468 Other
Rights:	© 2021 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 (https:// creativecommons.org/licenses/by/4.0/).
Divisions:	Schools > School of Architecture, Design and the Built Environment
Record created by:	Laura Ward
Date Added:	02 Jun 2021 14:34
Last Modified:	02 Jun 2021 14:34
Related URLs:	Publisher
URI:	https://irep.ntu.ac.uk/id/eprint/42964