Combined holographic subsurface radar and infrared thermography for diagnosis of the conditions of historical structures and artworks

Capineri, Lorenzo; Falorni, Pierluigi; Ivashov, Sergey; Zhuravlev, Andrey; Vasiliev, I.; Razevig, Vladimir; Bechtel, Timothy; Stankiewicz, G.

doi:10.3997/1873-0604.2010005

Cited by 14 publications

(16 citation statements)

References 10 publications

(7 reference statements)

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“…Traditionally, several NDT methods have been applied to these studies, with the selection and effectiveness of a particular technology dependent upon the properties of medium under investigation. To assess the capabilities of different NDT for cultural heritage studies, additional research was done; see for example [116].…”

Section: Cultural Heritage Inspection and Diagnosticsmentioning

confidence: 99%

Design and Applications of Multi-Frequency Holographic Subsurface Radar: Review and Case Histories

Ivashov¹,

Capineri²,

Bechtel³

et al. 2021

Preprint

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Holographic subsurface radar (HSR) is currently not in widespread usage. This is due to an historical perspective in the ground penetrating radar (GPR) community that the high attenuation of electromagnetic waves in most media of interest, and the inability to apply time-varying gain to the continuous wave (CW) HSR signal precludes sufficient effective penetration depth. While it is true that the fundamental physics of HSR, with its use of a CW signal, does not allow amplification of later (i.e. deeper) arrivals in lossy media (as is possible with impulse subsurface radar — ISR), HSR has distinct some distinctive advantages. The most important of these is the ability to do shallow subsurface imaging with a resolution that is not possible with ISR. In addition, the design of an HSR system is simpler than for ISR due to the relatively low-tech transmitting and receiving antennae. This paper provides a review of the main principles of HSR through an optical analogy and describes possible algorithms for radar hologram reconstruction. We also present a review of the history of development of systems and applications for HSR of the “RASCAN” type which is possibly the only holographic subsurface radar that is produced in lots. Among the subsurface imaging and remote sensing applications considered are humanitarian demining, construction inspection, surveys of historic architecture and artworks, nondestructive testing of dielectric aerospace materials, security applications, paleontology, detection of wood-boring insect damage, and others. Each application is illustrated with relevant data acquired in laboratory and/or field experiments.

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Section: Cultural Heritage Inspection and Diagnosticsmentioning

confidence: 99%

Design and Applications of Multi-Frequency Holographic Subsurface Radar: Review and Case Histories

Ivashov¹,

Capineri²,

Bechtel³

et al. 2021

Preprint

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“…Nondestructive testing techniques based on infrared thermography find application in several fields such as structural and civil engineering [3], [4] also applied to restoration and maintenance of historical structures [5], [6], material and aerospace engineering [7], [8], [9], and evaluation of safety and reliability in manufacturing (quality control) [10]. Detecting the characteristics of a possible defect in a reasonably short time can be crucial for processes cost effectiveness and minimization of human life threats in working environments [11].…”

Section: Introductionmentioning

confidence: 99%

Analytical and simulation investigation of the experimental design for infrared non destructive testing

Necsulescu

Spinello

Borazjani

et al. 2011

2011 19th Mediterranean Conference on Control &Amp; Automation (MED)

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Index Terms-Non destructive testing; Fault diagnosis; Experiment design; Parameters predetermination; Modeling & simulation.Abstract-We analyse heat conduction in a slab with imposed persistent oscillating temperature. Fourier series and periodic time varying solutions are derived by using separation of variables techniques. The analysis is aimed at assessing the limits of applicability of the simplified analytical model derived in [1] under the hypothesis of semi-infinite spatial domain. Such model allows for parameters predetermination in the design of experiments related with nondestructive tests for defects detection and failure prediction. The effect of the finite length of the specimen is investigated, therefore setting the foundation for experimental investigation of nondestructive damage detection with infrared active thermography with boundary effects accounted for.

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“…One of the most popular techniques able to detect moisture in wooden structures is the infrared thermography (IRT) [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…FFT score2 = 79.868• ln(W) + 572.53 (10) Looking at the results, it is possible to say that the PSM model (FFT Amplitude score-2nd frequency vs. water content) is robust for both high and low water contents (w[%] in wooden samples). Therefore, the advantages in the using of a speckle pattern are threefold: a) it do not need of any heating source, b) being very similar to electronic speckle pattern interferometry (ESPI), it can detect displacements on a surface of less than the wavelength of the illuminating coherent light source [38], and c) although the drying procedure explained above is highly desirable, the samples do not need a special preparation before analysis.…”

mentioning

confidence: 99%

Measuring the Water Content in Wood Using Step-Heating Thermography and Speckle Patterns-Preliminary Results

Saavedra

Сфарра

Perilli

et al. 2020

Sensors

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The relationship between wood and its degree of humidity is one of the most important aspects of its use in construction and restoration. The wood presents a behavior similar to a sponge, therefore, moisture is related to its expansion and contraction. The nondestructive evaluation (NDE) of the amount of moisture in wood materials allows to define, e.g., the restoration procedures of buildings or artworks. In this work, an integrated study of two non-contact techniques is presented. Infrared thermography (IRT) was able to retrieve thermal parameters of the wood related to the amount of water added to the samples, while the interference pattern generated by speckles was used to quantify the expansion and contraction of wood that can be related to the amount of water. In twenty-seven wooded samples, a known quantity of water was added in a controlled manner. By applying advanced image processing to thermograms and specklegrams, it was possible to determine fundamental values controlling both the absorption of water and the main thermophysical parameters that link the samples. On the one hand, results here shown should be considered preliminary because the experimental values obtained by IRT need to be optimized for low water contents introduced into the samples. On the other hand, speckle interferometry by applying an innovative procedure provided robust results for both high and low water contents.

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Combined holographic subsurface radar and infrared thermography for diagnosis of the conditions of historical structures and artworks

Cited by 14 publications

References 10 publications

Design and Applications of Multi-Frequency Holographic Subsurface Radar: Review and Case Histories

Design and Applications of Multi-Frequency Holographic Subsurface Radar: Review and Case Histories

Analytical and simulation investigation of the experimental design for infrared non destructive testing

Measuring the Water Content in Wood Using Step-Heating Thermography and Speckle Patterns-Preliminary Results

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