Ultrasonic phased array technology for the non-destructive testing of marble sculptures

Tiefensee, Frank; Weber, P. K.; Kunz, Simon; Pamplona, Marisa; Šimon, Štefan

doi:10.1080/00393630.2016.1141538

Cited by 7 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…What various ultrasound techniques all have in common is the utilization of a single-channel electronic system with transmitting and receiving transformers having frequencies lower than 350 kHz. Measurements are time-consuming and the locations or dimensions of internal defects can only be estimated [91].…”

Section: Studies On Crack Assessment In Marble Sculpturesmentioning

confidence: 99%

Comprehensive Review of Studies on Metamorphic Rocks

Citak,

Coramik,

Gunes

et al. 2023

IJG

View full text Add to dashboard Cite

Marble is a metamorphic rock, which is one of the 3 basic rock types (magmatic, sedimentary, metamorphic) forming the earth's crust. The major characteristic sought after in a rock mass in the field for it to be exportable and usable as marble is its suitability to be cut in blocks. In the process of producing marble slabs from marble blocks, the blocks are expected not to contain potentially problematic hard or weak zones and their geomechanical and chemical properties should conform to the relevant standards. Ignoring of the geological properties of the rock in the process of deciding for marble production at a marble site and determination of production location, direction and method is the most important parameter that would increase production loss. In order to reduce losses by determination of geological properties of marble, many academic studies have been conducted on the effects of water saturation, temperature, freezing and thawing on its mechanical and fracture properties. There are further studies on crack propagation in marble under stress. However, even those marble blocks that are obtained based on geological parameters may suffer serious cracks or fractures due to stresses caused by their weight and geometry. Therefore, cutting direction is of critical importance in order to minimize marble waste in the process of cutting a marble block which is brought to the inventory or processing site with cracks, cavities or fractures. Certain studies exist within such context, where the geometry of the discontinuity within a block is determined using non-destructive methods, such as ultrasonic testing, in order to determine the appropriate cutting direction. Such studies made use of ultrasonic waves to determine the physical and chemical structures of magmatic and sedimentary rocks by measuring the progress velocity of sonic waves in the rock. Said studies,

show abstract

Section: Studies On Crack Assessment In Marble Sculpturesmentioning

confidence: 99%

Comprehensive Review of Studies on Metamorphic Rocks

Citak,

Coramik,

Gunes

et al. 2023

IJG

View full text Add to dashboard Cite

show abstract

“…In the past two decades, phased array (PA) ultrasonic imaging has been widely used in nondestructive testing [1][2][3]. The total focusing method (TFM) based on the full matrix capture (FMC) array signals acquisition is one of the most popular ultrasonic imaging methods [4].…”

Section: Introductionmentioning

confidence: 99%

Fourier-domain beamforming for Full Matrix Capture Data with Circular Statistics Vector Weighting in Nondestructive Testing

Yao

Xiong

et al. 2023

Preprint

View full text Add to dashboard Cite

Total focusing method (TFM) based on full-matrix capture (FMC) is widely used in the field of nondestructive testing due to its high resolution and high signal-to-noise ratio. In order to solve the problems of the slow speed of traditional time-domain total focusing imaging and poor imaging quality, this paper proposes a total focusing imaging method weighted by circular statistics vector (CSV) in the Fourier domain (FD). Firstly, the cosine and sinusoidal components of the instantaneous phase in the undelayed RF signal are extracted, and the coherence factor is established according to the cosine and sinusoidal components in the FD domain. Finally, the total focusing image in the FD domain is weighted. The complexity calculation shows that CSV-weighted imaging in the FD domain has a higher imaging speed than delay-and-sum (DAS) imaging. The DAS total focusing imaging algorithm, FD domain total focusing imaging algorithm, and FD domain CSV weighted imaging algorithm are used to verify the hole and crack defects in brass test blocks, aluminum test blocks, and steel test blocks. The experimental results show that the proposed FD domain CSV weighted imaging map generally shows higher resolution and signal-to-noise ratio, and the algorithm has higher robustness. Also, it has revealed a low computational load.

show abstract

“…Besides the study of Pwaves and S-waves (i.e. shear waves) velocity , Rayleigh waves have been also used in order to characterize the surface weathering effects of marble [35]. As the travel time of the propagated P-waves does not offer a complete evaluation of the wave transmission process it was proposed spatial attenuation as highly sensitive, more than v, to the petrographic characteristics (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…These applications typically exploit a frequency range of 50-500 kHz (central frequency) in order to achieve penetrations around tens of centimeters or more. The use of frequencies higher than 1 MHz is limited by their strong attenuation in marble [35,37]. Thus, in direct transmission measurements it is desirable to find a compromise between spatial resolution and penetration, mainly due to the need of recording pulse-echo signals from the back surface.…”

Section: Introductionmentioning

confidence: 99%

A photoacoustic pulse-echo probe for monitoring surface stone mechanical properties: Validation tests in consolidation of Carrara marble

Mencaglia

Ciofini

2018

Construction and Building Materials

View full text Add to dashboard Cite

The present work focuses on the development and validation of a laser-based photoacoustic sensor for non-destructive monitoring of surface stone mechanical properties. The sensor is constituted of a carbon black target excited by fiber-coupled Q-Switched Nd:YAG(1064 nm) laser with variable pulse duration between 10 and 50 ns, a superimposed PVDF film transducer, and gel coupler. The high optical absorption of the target and its relatively large lateral size allowed generating planar longitudinal pressure waves of amplitude around 1 MPa using a laser pulse fluence of about 8 mJ/cm 2. The probe provided an almost flat spectral response over a bandwidth of 7.5-30 MHz. Thanks to the high pulse-to-pulse laser power stability, the pressure transients were highly reproducible in amplitude and waveform. These features and the FFT analysis of the back reflected signal were exploited to characterize the surface mechanical properties of decayed Carrara marble upon consolidation. Treatment tests were carried out using three commercial products: acrylic-siloxane polymer, a fluoroelastomeracrylic polymer, and ethyl-silicate. The acoustic reflection and then surface sound speed spectra were measured and analyzed for the first time within a spectral window of 1-30 MHz. Surface speed spectra and dephasing derived from reflectance measurements resulted to be essential parameters for characterizing and monitoring stone consolidation. The results achieved provide evidence that the technique proposed offers significant advantages with respect to traditional approaches and can represent an effective tool in conservation-restoration of stone artifacts, wall paintings, and other.

show abstract

Ultrasonic phased array technology for the non-destructive testing of marble sculptures

Cited by 7 publications

References 2 publications

Comprehensive Review of Studies on Metamorphic Rocks

Comprehensive Review of Studies on Metamorphic Rocks

Fourier-domain beamforming for Full Matrix Capture Data with Circular Statistics Vector Weighting in Nondestructive Testing

A photoacoustic pulse-echo probe for monitoring surface stone mechanical properties: Validation tests in consolidation of Carrara marble

Contact Info

Product

Resources

About