THERMOGRAPHIC ANALYSIS FROM UAV PLATFORMS FOR ENERGY EFFICIENCY RETROFIT APPLICATIONS

Authors

  • MATTIA PREVITALI Politecnico di Milano, Department of Architecture, Built Environment and Construction Engineering Milan, Italy
  • LUIGI BARAZZETTI Politecnico di Milano, Department of Architecture, Built Environment and Construction Engineering Milan, Italy
  • RAFFAELLA BRUMANA Politecnico di Milano, Department of Architecture, Built Environment and Construction Engineering Milan, Italy
  • FABIO RONCORONI Politecnico di Milano, Polo Territoriale di Lecco, Lecco

Keywords:

Building models, infrared imaging, image processing, laser scanning, retrofitting

Abstract

Thermal efficiency of building is a fundamental aspect in different countries to reach energy consumption reduction. However, even if a great attention is paid to build new “zero-energy” buildings, low attention is paid to retrofit existing ones. A fast analysis of existing buildings with Infrared Thermography (IRT) has proved to be an adequate and efficient technique. Indeed, IRT can be used to determine energy efficiency and to detect defects like thermal bridges and heat losses. However, both surface temperature and geometry are needed for a reliable evaluation of thermal efficiency, where spatial relationships are important to localize thermal defects and quantify the affected surfaces. For this reason, integration between Building Information Models (BIMs) and Infrared Thermography (IRT) can be a powerful tool to combine geometric information with thermal data in the same model. In this paper a methodology for automated generation of 3D model of buildings from laser data and integration with thermal images is presented. The developed methodology allows also fusion of thermal data acquired from different cameras and platforms. In particular, this paper will focus on thermal images acquired by an Unmanned Aerial Vehicle (UAV). The proposed methodology is suitable for fast building inspections aimed at detecting the thermal anomalies in a construction. Its applicability was tested on different buildings demonstrating the performance of the procedure and its valid support in thermal surveys.

 

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2013-05-12

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