Monitoring of historical frescoes by timed infrared imaging analysis

Cadelano, G.; Bison, P.; Bortolin, A.; Ferrarini, G.; Peron, Fabio; Girotto, Mario; Volinia, Monica

doi:10.1515/oere-2015-0012

Cited by 40 publications

(20 citation statements)

References 15 publications

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“…One of the most relevant analyses is proposed by the ISO 13786 standard [11], that suggest to use the mathematical methods to determine some key parameters of the wall, such as the periodic thermal transmittance, the decrement factor, and the time shift. In this 10.21611/qirt.2018.028 work, the focus is on the time shift, as it represents a quantity that gives a quick interpretation of the thermal phenomena and allows an easy comparison between different kinds of specimens. The time shift is defined [11] as the period of time between the maximum amplitude of a cause and the maximum amplitude of its effect, such as the difference between the surface temperatures on two opposite sides of a wall when on side receives a thermal stimulation.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The time shift was calculated as the absolute value of the difference between t1 and t2, the times corresponding to the peak temperature values respectively on the hot and cold side of the specimen. The use of similar specimen and the synchronization of the thermal stimulus allows to consider the cold side temperature of one specimen a reference for 10.21611/qirt.2018.028…”

Section: Fig 2 Thermal Image Obtained During the Experiment The Pomentioning

confidence: 99%

“…Recently, Ferrarini et al [7] proposed a method for the quantification of the time shift for a wall sample. The method is based on infrared thermography (IRT) [8], that since long time is a valid technique for the survey of buildings and the measurement of their thermal properties [9,10]. In this work, the thermographic method is adapted to the simultaneous testing of two wall specimens.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Periodic thermal behavior of walls: an experimental approach

Ferrarini¹,

Bison²,

Bortolin³

et al. 2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

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The need for testing methods that could verify the performance of building components is continuously increasing, as it is mandatory to reduce the overall energy need of the buildings. This work provides a method that determines the dynamic behavior of walls. The time-shift due to the thermal and physical properties of the component is measured using infrared thermography. A case study on a typical wall sample is proposed, validating the technique.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Fig 2 Thermal Image Obtained During the Experiment The Pomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Periodic thermal behavior of walls: an experimental approach

Ferrarini¹,

Bison²,

Bortolin³

et al. 2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

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show abstract

“…However, the usual thermographic survey of a building is performed by an operator that takes few spot thermal images of the areas of interest. Long-term thermographic building surveys have been performed only in experimental cases 18,21 , even if they could lead to results that are not obtainable with single spot measurements. This is related to technical and practical issues that could be typical of surveys (e.g.…”

Section: Introductionmentioning

confidence: 99%

Thermographic measurement of thermal bridges in buildings under dynamic behavior

et al. 2016

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The accurate knowledge of the thermal performance could reduce significantly the impact of buildings on global energy consumption. Infrared thermography is widely recognized as one of the key technologies for building surveys, thanks to its ability to acquire at a glance thermal images of the building envelope. However, a spot measurement could be misleading when the building is under dynamic thermal conditions. In this case data should be acquired for hours or days, depending on the thermal properties of the walls. Long term thermographic monitoring are possible but imply strong challenges from a practical standpoint.This work investigates the possibilities and limitations of spot thermographic surveys coupled with contact probes, that are able to acquire continuously the thermal signal for days, to investigate the thermal bridges of a building. The goal is the estimation of the reliability and accuracy of the measurement under realistic environmental conditions. Firstly, numerical simulations are performed to determine the reference value of an experimental case. Then a long term thermographic survey is performed and integrated with the contact probe measurement, assessing the feasibility of the method.

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“…IRT is widely utilized for the analysis of different materials and components, and its non-invasive and contactless nature promotes it as a suitable technique for the inspection of artworks [2]. Cultural heritage is typically surveyed to find hidden structure or information, to determine the presence of moisture related damage, to locate delamination or detachments [3].…”

Section: Introductionmentioning

confidence: 99%

Thermographic survey of frescoes with different thermal stimuli: a PLS-based analysis

Bison¹,

Bortolin²,

Cadelano³

et al. 2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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Infrared thermography is a well-known technique for the non-destructive evaluation of artworks. In recent times, several image processing algorithms have been proposed and studied to enhance the detection of defects. Amongst them, post-processing methods based on Partial Least Squares (PLS) have shown good results in terms of reliability and detectability of defects. This work analyzes the available PLS-related algorithms for the evaluation of a fresco sample with known defects, stimulated with different heating sources. The results are compared in terms of Signal to Noise Ratio and Receiver Operating Characteristic curves.

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Monitoring of historical frescoes by timed infrared imaging analysis

Cited by 40 publications

References 15 publications

Periodic thermal behavior of walls: an experimental approach

Periodic thermal behavior of walls: an experimental approach

Thermographic measurement of thermal bridges in buildings under dynamic behavior

Thermographic survey of frescoes with different thermal stimuli: a PLS-based analysis

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