Thermography is now commonly used as a tool for the qualitative inspection of buildings, for different purposes such as energy monitoring, moisture mapping and many others. All these controls need to correctly locate in space the different phenomena observed and evaluate the area affected by the phenomena. Furthermore, when thermography is applied quantitatively and fluxes are evaluated, the precise area affected by the process is of paramount importance. This paper intends to approach the issue to obtain a correct three-dimensional reconstruction of the building that will promptly integrate all the information to the surface, such as wall temperature, optical absorption coefficient, etc. For this purpose, at first the influence of the visual and IR optics calibration is addressed. After that, sets of images taken in the visible and infrared spectrum are processed for the geometric correction, mosaicing and 3D reconstruction. The ultimate output is a 3D model of the object implemented with matching sets of data (e.g. temperature, heat flux, etc.) allowing an easy visualization and their correct positioning in space. The main result of this process is the capability of quantitative analysis of thermal processes acting on the building.
Several techniques to characterize thermal properties had been developed by using photothermal methods and IR thermography in particular. Some of them are applied in this work on specimens of different building materials, comparing the results and trying to give a correct uncertainty evaluation for each of them. Thermographic measurements are complemented with specific heat by differential scanning calorimeter and volumic mass measurements.
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