Aerial photogrammetry for monitoring construction pathologies using pixel-based fuzzy logic, case study: Igrejinha da Pampulha

Tiago de Castro Hardy, Willi de Barros Gonçalves, Yacy-ara Froner
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Abstract

This article presents part of the master’s dissertation submitted to the Graduate Program in Built Environment and Sustainable Heritage (PPGACPS) at the School of Architecture of the Federal University of Minas Gerais (UFMG), Brazil. The article discusses the state of the art in scientific documentation of architectural heritage and the Heritage Building Information Modelling (HBIM) methodology applied to damage monitoring. The presented study aims to investigate an approach for using RPA (Remotely Piloted Aircraft) as a tool for scientific documentation, in mapping, monitoring, and conservation diagnosis protocols for architectural cultural heritage. The case study involves monitoring a crack located on the roof of the Church of São Francisco de Assis, better known as “Igrejinha da Pampulha,” an iconic work of modern Brazilian architecture, located in Belo Horizonte, MG. The method involved photogrammetry techniques performed with RPA, analysis of digital images through binarization techniques and pixel recognition in Raster images. It concludes that the methodology can be effective for damage monitoring on larger scales. In the case study, the Ground Sampling Distance (GSD) ratio generated a 2 × 2 cm pixel, resulting in an error of two square centimeters in crack monitoring through matrix data analysis, which can be altered with a higher resolution camera and a lower flight height. The main result is a methodological proposal for monitoring cracks in the dome of the studied building. The main conclusion is that the methodology is effective, especially when applied to large-scale objects, such as dam monitoring. It is recommended that in future inspections, if the same equipment is used, the flight should be conducted at a shorter distance from the object of study. The study demonstrates the potential of digital surveying performed by RPA as well as the HBIM methodology as a form of documentation, extroversion, and management of architectural cultural heritage.

使用基于像素的模糊逻辑监测建筑病理的航空摄影测量,案例研究:Igrejinha da Pampulha
本文介绍了提交给巴西米纳斯吉拉斯州联邦大学(UFMG)建筑学院建筑环境与可持续遗产研究生课程(PPGACPS)的硕士论文的一部分。本文讨论了建筑遗产科学文献的现状,以及用于损害监测的遗产建筑信息模型(HBIM)方法。本研究旨在探讨一种使用RPA(遥控飞行器)作为科学文献、测绘、监测和建筑文化遗产保护诊断协议的工具的方法。该案例研究涉及监测位于 o Francisco de Assis教堂屋顶上的裂缝,该教堂被称为“Igrejinha da Pampulha”,是位于MG贝洛奥里藏特的现代巴西建筑的标志性作品。该方法涉及使用RPA执行的摄影测量技术,通过二值化技术对数字图像进行分析,并在栅格图像中进行像素识别。结果表明,该方法可以有效地用于更大规模的损伤监测。在案例研究中,地面采样距离(Ground Sampling Distance, GSD)比产生的像素为2 × 2 cm,导致矩阵数据分析裂缝监测误差为2平方厘米,可以通过更高分辨率的相机和更低的飞行高度来改变。主要结果是对所研究建筑穹顶裂缝监测的方法建议。主要结论是,该方法是有效的,特别是当应用于大规模的对象,如大坝监测。建议在以后的检查中,如果使用相同的设备,应在距离研究对象较短的距离进行飞行。该研究展示了由RPA执行的数字测量的潜力,以及HBIM方法作为建筑文化遗产的记录、外向和管理形式的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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