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Article: Simple correction methods of infrared thermography for building exterior surfaces

TitleSimple correction methods of infrared thermography for building exterior surfaces
Authors
KeywordsEquivalent surrounding reflection temperature
Infrared reflection
Infrared thermography
Surface temperature
Temperature measurement
Issue Date2010
PublisherVEETECH Ltd. The Journal's web site is located at http://www.ijovent.org/
Citation
International Journal Of Ventilation, 2010, v. 9 n. 3, p. 261-272 How to Cite?
AbstractThere is a need to improve the accuracy of infrared thermography for measuring the temperature distribution of building exterior surfaces. Thermography is useful for building ventilation and thermal analysis, as well as understanding city ventilation and the urban heat island phenomenon. The key in correcting infrared images is to quantify accurately the reflected infrared contribution of surrounding surfaces as well as that of the atmosphere. Two new methods are proposed here for correcting measured temperature distribution of building exterior surfaces by infrared thermography. The first is a simplified version of the aluminium mirror method first developed by Datcu et al (2005). The second is a temperature-based method using the measured surface temperatures at one or more points on the same surface. We present two series of specially designed experiments to evaluate the two proposed methods and two other commonly used/default methods. The temperature-based method can be used effectively to correct the infrared thermography results for measured surfaces with both specular and diffuse reflection, while the aluminium mirror method can only be used for surfaces with diffuse reflection. A good agreement was observed between the corrected infrared thermography results using the temperature-based method and thermocouple measurements with a mean error ranging between 0.07-0.36°C for concrete surfaces, 0.05-0.11°C for glazing surfaces and 0.17-0.41°C for tile surfaces. The centre location of the target surface can be used as an ideal sampling point for correcting the entire measured surface. The proposed new methods were further verified on a real building external surface. The method is also applicable to measurement of indoor surfaces.
Persistent Identifierhttp://hdl.handle.net/10722/139349
ISSN
2015 Impact Factor: 0.662
2015 SCImago Journal Rankings: 0.474
References

 

DC FieldValueLanguage
dc.contributor.authorYang, Len_HK
dc.contributor.authorLi, Yen_HK
dc.date.accessioned2011-09-23T05:48:42Z-
dc.date.available2011-09-23T05:48:42Z-
dc.date.issued2010en_HK
dc.identifier.citationInternational Journal Of Ventilation, 2010, v. 9 n. 3, p. 261-272en_HK
dc.identifier.issn1473-3315en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139349-
dc.description.abstractThere is a need to improve the accuracy of infrared thermography for measuring the temperature distribution of building exterior surfaces. Thermography is useful for building ventilation and thermal analysis, as well as understanding city ventilation and the urban heat island phenomenon. The key in correcting infrared images is to quantify accurately the reflected infrared contribution of surrounding surfaces as well as that of the atmosphere. Two new methods are proposed here for correcting measured temperature distribution of building exterior surfaces by infrared thermography. The first is a simplified version of the aluminium mirror method first developed by Datcu et al (2005). The second is a temperature-based method using the measured surface temperatures at one or more points on the same surface. We present two series of specially designed experiments to evaluate the two proposed methods and two other commonly used/default methods. The temperature-based method can be used effectively to correct the infrared thermography results for measured surfaces with both specular and diffuse reflection, while the aluminium mirror method can only be used for surfaces with diffuse reflection. A good agreement was observed between the corrected infrared thermography results using the temperature-based method and thermocouple measurements with a mean error ranging between 0.07-0.36°C for concrete surfaces, 0.05-0.11°C for glazing surfaces and 0.17-0.41°C for tile surfaces. The centre location of the target surface can be used as an ideal sampling point for correcting the entire measured surface. The proposed new methods were further verified on a real building external surface. The method is also applicable to measurement of indoor surfaces.en_HK
dc.languageengen_US
dc.publisherVEETECH Ltd. The Journal's web site is located at http://www.ijovent.org/en_HK
dc.relation.ispartofInternational Journal of Ventilationen_HK
dc.subjectEquivalent surrounding reflection temperatureen_HK
dc.subjectInfrared reflectionen_HK
dc.subjectInfrared thermographyen_HK
dc.subjectSurface temperatureen_HK
dc.subjectTemperature measurementen_HK
dc.titleSimple correction methods of infrared thermography for building exterior surfacesen_HK
dc.typeArticleen_HK
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-78650086260en_HK
dc.identifier.hkuros192408en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78650086260&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume9en_HK
dc.identifier.issue3en_HK
dc.identifier.spage261en_HK
dc.identifier.epage272en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridYang, L=13806737800en_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK

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