@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix vcard: . @prefix xsd: . a dcat:Dataset ; dct:description """ Thermography is a very useful diagnosis tool in buildings and civil engineering structures. However quantitative diagnosis remains difficult, and having accurate values of surface emissivity is an important factor. The present work is a study about emissivity measurement for quantitative diagnosis with thermography. We needed accurate measurement of the emissivity of a number of civil engineering materials, in order to create a database. Thus, it was necessary to develop new portable measurement devices. Two devices using an indirect measurement method were developed at CERTES laboratory. The method uses the measurement of the reflectivity from a modulated IR source and requires calibration with a highly reflective surface. The first device uses a low-frequency, thermal modulation well-adapted to laboratory measurements, whereas the second one is a portable system using a mechanical modulation at a faster frequency, more appropriate to outdoor measurements. Both devices allow measurements in the broad (1—50µm) and narrow (8—14µm) bands. Experiments were performed on a large number of materials commonly used in buildings and civil engineering structures. The final objective of this work is to build a database of emissivity for these materials. A comparison of laboratory and on-site measurements of emissivity values obtained in both spectral bands is presented along with an estimation and an analysis of measurement uncertainties. A comparative study with measurement obtained at LNE (Laboratoire National de Métrologie et d'Essais, French laboratory of metrology) was performed, using a range of materials with widely different radiative properties. An analysis of discrepancies and their possible causes is presented """ ; dct:identifier "NNT: 2013PEST1128" ; dct:issued "2026-05-06T05:51:24.356256"^^xsd:dateTime ; dct:language "fr" ; dct:modified "2026-05-06T05:51:24.356261"^^xsd:dateTime ; dct:publisher ; dct:title "Emissivity measurement for Infrared thermography applied to quantitative diagnostic of structure" ; dcat:contactPoint [ a vcard:Organization ; vcard:fn "CCSD" ] ; dcat:distribution ; dcat:keyword "emissivite", "emissivity", "infoeu-reposemanticsdoctoralthesis", "infrared", "infrarouge", "spiotherengineering-sciences-physicsother", "thermographie", "thermography", "theses" ; dcat:landingPage . a dcat:Distribution ; dct:format "HTML" ; dct:issued "2026-05-06T05:51:24.367910"^^xsd:dateTime ; dct:modified "2026-05-06T05:51:24.344661"^^xsd:dateTime ; dct:title "Emissivity measurement for Infrared thermography applied to quantitative diagnostic of structure" ; dcat:accessURL . a foaf:Agent ; foaf:name "test_moissonnage_selune" . a foaf:Document .