Abstract:
:Ultrasonic flaw classification in weldment is an active area of research and many artificial intelligence approaches have been applied to automate this process. However, in the industrial applications, the ultrasonic flaw signals are not noise free and automatic intelligent defect classification algorithms show relatively low classification performance. In addition, most of the algorithms require some statistical or signal processing techniques to extract some features from signals in order to make classification easier. In this article, the convolutional neural network (CNN) is applied to noisy ultrasonic signatures to improve classification performance of weldment defects and applicability. The result shows that CNN is robust, does not require specific feature extraction methods and give considerable high defect classification accuracies even for noisy signals.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Munir N,Kim HJ,Park J,Song SJ,Kang SSdoi
10.1016/j.ultras.2018.12.001subject
Has Abstractpub_date
2019-04-01 00:00:00pages
74-81eissn
0041-624Xissn
1874-9968pii
S0041-624X(18)30575-4journal_volume
94pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract::Experimental studies of thermal effects in high-intensity focused ultrasound (HIFU) procedures are often performed with the aid of fine wire thermocouples positioned within tissue phantoms. Thermocouple measurements are subject to several types of error which must be accounted for before reliable inferences can be mad...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2010.07.007
更新日期:2011-02-01 00:00:00
abstract::This paper describes an optimization method of the top electrode size for a thin film matrix ultrasonic transducer (M-UT) in the frequency range above 200 MHz. The goal of this work is to design an optimal top electrode size for an M-UT providing the maximal output peak-peak voltage (V(PP)) and the maximal signal-to-n...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2012.10.018
更新日期:2013-03-01 00:00:00
abstract::Focused ultrasound holds promise in a large number of therapeutic applications. It has long been known that high intensity focused ultrasound can kill tissue through coagulative necrosis. However, it is only in recent years that practical clinical applications are becoming possible, with the development of high power ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2004.04.003
更新日期:2004-08-01 00:00:00
abstract::The digital ultrasonic fixed path interferometer designed for testing small amounts of sample was used for the investigation of whole blood coagulation, retraction and clot melting processes. The ultrasound velocity and absorption are determined from the characteristics of an acoustic resonator consisting of an emitte...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/0041-624x(78)90007-0
更新日期:1978-01-01 00:00:00
abstract::We propose a method for evaluating the size of the laser-induced breakdown region in water based on the detection and analysis of optodynamic waves. The breakdown region is an optodynamic source of pressure waves that propagate into the surrounding liquid as an ultrasonic pulse. In the experiment the optical breakdown...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.05.078
更新日期:2006-12-22 00:00:00
abstract::In this paper a high intensity focused ultrasound (FUS) phantom model was developed, in order to be used in experiments for Blood Brain Barrier (BBB) disruption. The target was to create a phantom model that represents the disruption of the BBB during ultrasound application. An appropriate experimental setup was creat...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2020.106244
更新日期:2021-02-01 00:00:00
abstract::This paper deals with the analysis of the guided evanescent waves in stopbands of a 1D phononic crystal (PC). A new numerical implementation is shown in order to get the complex values of the wavenumbers in a frequency range where a gap occurs. The considered phononic system is an aluminum plate with a one-dimensional...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2012.09.009
更新日期:2013-02-01 00:00:00
abstract::A noble method for continuous leakage source location with one sensor in gas-filled pipe and noisy environment is proposed based on wavelet analysis and modal location theory. The leakage signals were analyzed into high and low frequencies by wavelet decomposition and noises and reflected waves were omitted. Then the ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2015.06.004
更新日期:2015-09-01 00:00:00
abstract::An ultrasonic technique for imaging nonlinear scatterers, such as partially-closed cracks, buried in a medium has been recently proposed. The method called fundamental wave amplitude difference (FAD) consists of a sequence of acquisitions with different subsets of elements for each line of the image. An image revealin...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2019.02.003
更新日期:2019-07-01 00:00:00
abstract::The estimation of clamping force has been regarded as the main issue in the maintenance of high-tension bolts. This paper proposes a method which uses the dependency of ultrasonic velocity on stress based on the nonlinear elastic effect. The variation of ultrasonic velocity in the range of actual stress acting in the ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.05.190
更新日期:2006-12-22 00:00:00
abstract::In this research, the use of powerful sonification is studied in making the extraction of tannins more efficient. A combined extraction-filtration system using sonification was designed and modelled. Preliminary extraction studies were carried out to show the effect of ultrasound in extraction. In these experiments hi...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00163-8
更新日期:2000-03-01 00:00:00
abstract::For coupled structures surrounded by heavy fluids, it is difficult to obtain dispersion curves from an eigenvalue analysis, because the external fluid term in the coupled equation includes transcendental functions for frequency and wavenumber. Thus, in this study, the acoustic mass of the external fluid was approximat...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2017.12.009
更新日期:2018-04-01 00:00:00
abstract::Our study aims at the creation of a numerical toolbox that describes wave propagation in samples containing internal contacts (e.g. cracks, delaminations, debondings, imperfect intergranular joints) of known geometry with postulated contact interaction laws including friction. The code consists of two entities: the co...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2017.07.003
更新日期:2018-01-01 00:00:00
abstract::It has been established that structural changes in a ferrofluid (formation of clusters) upon the effect of an external magnetic field can be effectively studied by ultrasound spectroscopy. In particular, the resonance absorption of ultrasonic waves enables detection and determination of the size of spherical clusters....
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00117-8
更新日期:2002-05-01 00:00:00
abstract::In this paper we discuss the existence of translational and rotational displacements of a sphere submitted to a tangential contact force. On the basis of the Bogdanov and Skvortsov's works [A.N. Bogdanov, A.T. Skvortsov, Sov. Phys. Acoust. 38 (1992) 224-226.] the dispersion equation has been established and solved for...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.07.019
更新日期:2006-12-01 00:00:00
abstract::The paper presents the characteristics of vertically polarized surface waves generated in silicon substrate by acoustic coupling of bulk waves excited in a periodically patterned ZnO film on silicon. The finite element simulations are performed on the proposed patterned-ZnO/Si structure and vertically polarized modes ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2015.01.008
更新日期:2015-05-01 00:00:00
abstract::Human umbilical cords were exposed to high amplitude focussed ultrasonic pulses with focal energy densities 0.6 and 0.4 mJ mm-2. The endothelium of the exposed vessel (vein) was examined by means of confocal laser scanning microscopy and scanning electron microscopy. The degree of tissue change ranged from the inducti...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/0041-624x(94)90111-2
更新日期:1994-09-01 00:00:00
abstract::Our objective was to investigate whether hemorrhage control can be achieved faster when high-intensity focused ultrasound (HIFU) is applied in the presence of ultrasound contrast agents (UCA) as compared to HIFU only application. Incisions (3 cm long and 0.5 cm deep) were produced in the livers of anesthetized rabbits...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.07.018
更新日期:2006-12-01 00:00:00
abstract::Ultrasonic techniques have been used to measure the elastic properties of bone. Eight human tibiae were used to determine and map the elastic properties of cortical and cancellous bone. The present study shows cortical bone to be at least orthotropic in its material symmetry. The mechanical properties of cortical bone...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(96)00078-9
更新日期:1996-12-01 00:00:00
abstract::This paper suggests a method for high-sensitivity damage detection. The method is based on pitch-catch measurements of Lamb waves combined with a baseline subtraction technique in the frequency-wavenumber domain. Small amplitude converted modes, generated during the interaction of propagating waves with damage, can th...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2013.08.010
更新日期:2014-02-01 00:00:00
abstract::This article describes the use of the frequency domain finite element (FDFE) technique for guided wave mode selection in inhomogeneous waveguides. Problems with Rayleigh-Lamb and Shear-Horizontal mode excitation in isotropic homogeneous plates are first studied to demonstrate the application of the approach. Then, two...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2015.12.007
更新日期:2016-04-01 00:00:00
abstract::The propagation of ultrasound through an austenitic weld is investigated experimentally as well as in a numerical simulation. The weld is insonified at normal incidence to the fusion line with a longitudinal contact transducer. In order to experimentally trace the ultrasound through the weld, slices of different thick...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00103-1
更新日期:2000-03-01 00:00:00
abstract::It is shown that a diffuse field is not devoid of phase information, but has a correlation function equal to the Green's function. More specifically, the cross-correlation between diffuse signals in two transducers is very nearly equal to the direct response of one transducer to an impulse applied to the other. This i...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00156-7
更新日期:2002-05-01 00:00:00
abstract::A reformulation of the Thomson-Haskell method is presented for calculating the reflection coefficients of multilayer structure immersing in the coupling fluid. Instead of directly multiplying the layer propagator matrix, the new method splits the layer propagator matrix and excursively determines the interface stiffne...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2012.08.004
更新日期:2012-12-01 00:00:00
abstract::The objective of this paper is to develop a nondestructive method for estimating the fracture toughness (K(IC)) of CrMoV steels used as the rotor material of steam turbines in power plants. To achieve this objective, a number of CrMoV steel samples were heat-treated, and the fracture appearance transition temperature ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(03)00154-9
更新日期:2003-09-01 00:00:00
abstract::Geometrical and material property changes cause deviations in the resonant conditions used for noncollinear wave mixing. These deviations are predicted and observed using the SV(ω1)+L(ω2)→L(ω1+ω2) interaction, where SV and L are the shear vertical and longitudinal waves, respectively, and ω1, ω2 are their frequencies....
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2014.11.009
更新日期:2015-03-01 00:00:00
abstract::We have developed an ultrasonic array sensor useable for locating air leaks in manned spacecraft and have found that this sensor locates leaks in a 1-m(2) plate to within 2 cm. The sensor consists of a 63-element multiplexed array plus a reference element, all constructed from a single PZT disc and a printed circuit b...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.07.020
更新日期:2006-12-01 00:00:00
abstract::Predominant physical phenomenon in highly scattering materials is the attenuation due to dispersion. Therefore, received echo has high frequencies more severely attenuated than low frequencies and the structural noise can be modeled as a non-stationary random process. Most of the proposed techniques for enhancing the ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.05.174
更新日期:2006-12-22 00:00:00
abstract::In this paper, we investigated theoretically and experimentally the effect of the conductivity of the film located in the immediate vicinity of the free side of a piezoelectric resonator based on the PZT ceramics on its characteristics. It is shown that with increasing the conductivity of the film at first the paralle...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2018.09.016
更新日期:2019-04-01 00:00:00
abstract::Accurate characterization of the characteristic dimensions of a periodically corrugated surface using ultrasonic imaging technique is investigated both theoretically and experimentally. The possibility of accurately characterizing the characteristic dimensions is discussed. The condition for accurate characterization ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2012.12.006
更新日期:2013-04-01 00:00:00