Thermal Imaging as a Non Destructive Testing Implemented in Heritage Conservation

Castillo, Rodrigo Velázquez; Pérez-Lara, Miguel A.; Rivera-Muñoz, Eric M.; Arjona, José Luis; Mario, E; Acosta-Osorio, A.A.; Galván-Ruiz, Miguel; Avanzada, Tecnología

doi:10.5539/jgg.v4n4p102

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…Various historical structures undergo serious problems due to moisture content caused by weather conditions or by internal leakages in the structure itself. Such complications have impact on such historical structures or to a certain material of the structure (Castillo, et al, 2012) & (Bagavathiappan, et al, 2013). A correct verdict would be to eliminate such damaging effects caused by moisture content, nonetheless, to minimize the destructive effects.…”

Section: Background Reviewmentioning

confidence: 99%

Application of Lock-In Thermography for Detecting Leakage Defects in Historic Masonry Arch Structures

Hama

Mohammed

2021

EAJSE

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Defects in masonry are difficult to detect with the naked eye. Non-destructive testing (NDT) techniques are one such ways to detect defects. One way to detect moisture is by using lock-in Infrared (IR) thermography technology. The main objective of this research is to detect a defect in masonry brick walls using infrared thermography camera. Infrared thermography tests were conducted in the laboratory on several experiments to understand time and temperature relationships. Tests were conducted on a masonry water tank with a known defect spot and were successfully detected from the thermography images. Two active approach methods were conducted: halogen lights and a heat gun. It has been shown that when using the heat-gun it is a quicker method according to the results. All procedures and methods performed in this report could be useful for field studies.

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Section: Background Reviewmentioning

confidence: 99%

Application of Lock-In Thermography for Detecting Leakage Defects in Historic Masonry Arch Structures

Hama

Mohammed

2021

EAJSE

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“…Among others, infrared thermography (IRT) represents a powerful tool in the framework of building physics and in the field of cultural heritage monitoring [12][13][14][15], where it is mainly used for the non-destructive and contactless observations of occluded construction details and the detection of damage underneath the object surface. Anna Luib [16] gives a recent overview with basic information, many sample applications, best-practice guidelines and an overview of European institutes involved in research focused on the use of IRT for built heritage.…”

Section: Introductionmentioning

confidence: 99%

3D Data Fusion for Historical Analyses of Heritage Buildings Using Thermal Images: The Palacio de Colomina as a Case Study

et al. 2022

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In the framework of built heritage monitoring techniques, a prominent position is occupied by thermography, which represents an efficient and non-invasive solution for these kinds of investigations, allowing the identification of phenomena detectable only in the non-visible range of the electromagnetic spectrum. This is of extreme interest, especially considering the possibility of integrating the radiometric information with the 3D models achievable from laser scanning or photogrammetric techniques, characterised by a high spatial resolution. This paper aims to illustrate how combining different geomatics techniques (in particular, by merging thermal images, laser scanning point clouds, and traditional visible colour photogrammetric data) can efficiently support historical analyses for studying heritage buildings. Additionally, a strategy for generating HBIM models starting from the integration of 3D thermal investigations and historical sources is proposed, concerning both the multi-temporal modification of the volumes of the building and the individual architectural elements. The case study analysed for the current research was the Palacio de Colomina in Valencia, Spain, a noble palace—now the headquarters of a university—that, during the last few centuries, has been subjected to considerable transformations in terms of rehabilitation works and modification of its volume.

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“…Uses of reflected infrared photographic recordings include revealing the latent marks of laser-removed tattoos for identification purposes [3,10] and pigment identification in heritage artworks [11], whilst thermal imaging can be used to assess potential damage to DNA samples on the outside of fired cartridge cases [12], observing cavitation formation formation by convergent-divergent constriction in pipes [13], and evaluating structural damage in heritage buildings [14].…”

Section: Introductionmentioning

confidence: 99%

Hot Shoes in the Room: Authentication of Thermal Imaging for Quantitative Forensic Analysis

2018

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Thermal imaging has been a mainstay of military applications and diagnostic engineering. However, there is currently no formalised procedure for the use of thermal imaging capable of standing up to judicial scrutiny. Using a scientifically sound characterisation method, we describe the cooling function of three common shoe types at an ambient room temperature of 22 • C (295 K) based on the digital output of a consumer-grade FLIR i50 thermal imager. Our method allows the reliable estimation of cooling time from pixel intensity values within a time interval of 3 to 25 min after shoes have been removed. We found a significant linear relationship between pixel intensity level and temperature. The calibration method allows the replicable determination of independent thermal cooling profiles for objects without the need for emissivity values associated with non-ideal black-body thermal radiation or system noise functions. The method has potential applications for law enforcement and forensic research, such as cross-validating statements about time spent by a person in a room. The use of thermal images can thus provide forensic scientists, law enforcement officials, and legislative bodies with an efficient and cost-effective tool for obtaining and interpreting time-based evidence.

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Thermal Imaging as a Non Destructive Testing Implemented in Heritage Conservation

Cited by 6 publications

References 19 publications

Application of Lock-In Thermography for Detecting Leakage Defects in Historic Masonry Arch Structures

Application of Lock-In Thermography for Detecting Leakage Defects in Historic Masonry Arch Structures

3D Data Fusion for Historical Analyses of Heritage Buildings Using Thermal Images: The Palacio de Colomina as a Case Study

Hot Shoes in the Room: Authentication of Thermal Imaging for Quantitative Forensic Analysis

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