Comparison of Infrared Thermography with Ground-Penetrating Radar for the Non-Destructive Evaluation of Historic Masonry Bridges

Lagüela, S.; Solla, Mercedes; Armesto, Julia

doi:10.21611/qirt.2012.179

Cited by 4 publications

(3 citation statements)

References 13 publications

(11 reference statements)

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“…Such actions could be done using non-destructive testing (NDT) techniques to spot defects present in such structures. One of the new ways to detect moisture is by using Infrared (IR) thermography technology (Lagüela, et al, 2012). This paper will concentrate on the identification of moisture as an indicator of the point of defect of masonry arch bridges.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

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

Hama

Mohammed

2021

EAJSE

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“…In most cases, the term "thermography" refers to the so-called "active" thermographic approach. Active thermography assumes the study of those temperature distributions which are induced by application of an external thermal impact-in contrast to "passive" thermography which generally deals with objects which are heated by natural sources or by other heat sources which are not set up intentionally for experiment (e.g., sunlight or natural body heat) [1][2][3][4]. This often makes the active thermography the only possible thermographic approach for the study of objects with no internal heat sources (e.g., composite and plastic panels for automotive applications).…”

Section: Introductionmentioning

confidence: 99%

Extraction of Independent Structural Images for Principal Component Thermography

Gavrilov

Maev

2018

Applied Sciences

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Thermography is a powerful tool for non-destructive testing of a wide range of materials. Thermography has a number of approaches differing in both experiment setup and the way the collected data are processed. Among such approaches is the Principal Component Thermography (PCT) method, which is based on the statistical processing of raw thermal images collected by thermal camera. The processed images (principal components or empirical orthogonal functions) form an orthonormal basis, and often look like a superposition of all possible structural features found in the object under inspection-i.e., surface heating non-uniformity, internal defects and material structure. At the same time, from practical point of view it is desirable to have images representing independent structural features. The work presented in this paper proposes an approach for separation of independent image patterns (archetypes) from a set of principal component images. The approach is demonstrated in the application of inspection of composite materials as well as the non-invasive analysis of works of art.

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“…Indeed, this technique presents the advantage of being a non destructive method: it means measures can be carried out without any physical contacts with the studied surface. This technique has already been implemented to the conservation of historical monuments [1,2,3], especially by detecting the presence of humid zones at different locations on the building walls. Humidity rates are crucial to know because they are one of the mediums of moisture spreading, which is an indicator of the building shape.…”

Section: Introductionmentioning

confidence: 99%

Non - intrusive thermal measurement methods adapted to painted cave walls

Legloanec¹,

Sommier²,

Sempey³

et al. 2014

Proceedings of the 2014 International Conference on Quantitative InfraRed Thermography

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Painted caves such as Lascaux are highly sensitive to their surrounding atmospheric conditions. To preserve them for the upcoming generations, it is necessary to understand thermal and mass transfers that happened between the painted walls and the air. A cave has been monitored with an infrared camera and a Peltier sensor. The singular value decomposition has been first applied to extract the relevant information. It revealed a non-random thermal behavior of the wall. Then a semi-infinite model combined with a Fourier analysis led us to evaluate the thermal effusivity of the cave wall. This latter is subjected to large measurement uncertainties.

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Comparison of Infrared Thermography with Ground-Penetrating Radar for the Non-Destructive Evaluation of Historic Masonry Bridges

Cited by 4 publications

References 13 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

Extraction of Independent Structural Images for Principal Component Thermography

Non - intrusive thermal measurement methods adapted to painted cave walls

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