Abstract:
:The acoustic source localization technique for anisotropic plates proposed by the authors in an earlier publication ([1] Kundu et al., 2012) is improved in this paper by adopting some modifications. The improvements are experimentally verified on anisotropic flat and curved composite plates. Difficulties associated with the original technique were first investigated before making any modification. It was noted that the accuracy of this technique depends strongly on the accuracy of the measured time difference of arrivals (TDOA) at different receiving sensors placed in close proximity in a sensor cluster. The sensor cluster is needed to obtain the direction of the acoustic source without knowing the material properties of the plate. Two modifications are proposed to obtain the accurate TDOA. The first one is to replace the recorded full time histories by only their initial parts - the first dip and peak - for the subsequent signal processing. The second modification is to place the sensors in the sensor cluster as close as possible. It is shown that the predictions are improved significantly with these modifications. These modifications are then applied to another sensor cluster based technique called the beamforming technique, to see if similar improvements are achieved for that technique also with these modifications.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Nakatani H,Kundu T,Takeda Ndoi
10.1016/j.ultras.2014.03.001subject
Has Abstractpub_date
2014-09-01 00:00:00pages
1776-88issue
7eissn
0041-624Xissn
1874-9968pii
S0041-624X(14)00056-0journal_volume
54pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract::In this paper, the radial basis function (RBF) collocation method based on the nonlocal Eringen piezoelectricity theory is developed to compute the band structures of nanoscale multilayered piezoelectric phononic crystals taking account of nonlocal interface effects. Detailed calculations are performed for anti-plane ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2016.09.009
更新日期:2017-01-01 00:00:00
abstract::Theoretical formulation for the problem of second harmonic guided waves in pipes is presented from the principles of continuum mechanics. The formulation is carried out in the reference configuration of the pipe with an emphasis on the correct use of the "Divergence" operator in the reference configuration. Second har...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2012.12.007
更新日期:2013-04-01 00:00:00
abstract::In cancellous bone, longitudinal waves often separate into fast and slow waves depending on the alignment of bone trabeculae in the propagation path. This interesting phenomenon becomes an effective tool for the diagnosis of osteoporosis because wave propagation behavior depends on the bone structure. Since the fast w...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2008.04.011
更新日期:2008-11-01 00:00:00
abstract::Experimental and theoretical studies on degradation of composite-epoxy adhesive joints were carried out on samples having different interfacial and cohesive properties. Oblique incidence ultrasonic inspection of bonded joints revealed that degradation in the adhesive can be measured by significant variation in reflect...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2013.01.014
更新日期:2013-08-01 00:00:00
abstract::The matrix method for analyzing flexural vibration system is outlined. The displacement, stress and velocity gain of ultrasonic flexural vibration systems are investigated by transfer matrix method. A design method is given for flexural transducer and vibration system. ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(00)00034-2
更新日期:2000-11-01 00:00:00
abstract::We perform a multiscale analysis of the backscattering properties of a complex interface between water and a layer of randomly arranged glass beads with diameter D=1 mm. An acoustical experiment is done to record the wavelet response of the interface in a large frequency range from lambda/D=0.3 to lambda/D=15. The wav...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.05.212
更新日期:2006-11-01 00:00:00
abstract::Targeted mechanical cell stimulation has been extensively studied for a better understanding of its effect on cellular mechanotransduction signaling pathways and structures by utilizing a variety of mechanical sources. In this work, an ultrasound-driven single cell stimulation method is thus proposed, and a preliminar...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2012.03.002
更新日期:2012-09-01 00:00:00
abstract::The importance of the analysis of the radiofrequency signal is by now recognized in the field of tissue characterization via ultrasound. The RF signal contains a wealth of information and structural details that are usually lost in the B-Mode representation. The HyperSPACE (Hyper SPectral Analysis for Characterization...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2016.02.010
更新日期:2016-05-01 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 backscattering model is developed for textured polycrystalline materials with orthotropic or trigonal grains of ellipsoidal shape. The model allows us to simulate realistic microstructures and orthotropic macroscopic material textures resulting from thermomechanical processing for a broad variety of mate...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2014.02.020
更新日期:2014-09-01 00:00:00
abstract::Electromagnetic-acoustic transducers (EMATs) consist of a magnet and a coil. They are advantageous in some non-destructive evaluation (NDE) applications because no direct contact with the specimen is needed to send and receive ultrasonic waves. However, EMATs commonly require excitation peak powers greater than 1kW an...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2017.02.009
更新日期:2017-07-01 00:00:00
abstract::The design and simulation of power transducers are difficult since piezoelectric, dielectric and elastic properties of ferroelectric materials differ from linear behavior when driven at large levels. This paper is devoted to modeling of a resonant power transducer at a high level of dynamic mechanical stress. The powe...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2011.05.017
更新日期:2011-12-01 00:00:00
abstract::Filamentous fungi are used in several industries and in academia to produce antibiotics, metabolites, proteins and pharmaceutical compounds. The development of valuable strains usually requires the insertion of recombinant deoxyribonucleic acid; however, the protocols to transfer DNA to fungal cells are highly ineffic...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2014.03.003
更新日期:2014-08-01 00:00:00
abstract::The ability to generate short focused ultrasonic pulses with duration on the order of one period of carrier frequency depends on the bandwidth of the transmitter as the pulse duration is inversely proportional to the bandwidth. Conventional focusing arrays used for focusing ultrasound have limited bandwidth due to the...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2008.10.008
更新日期:2009-03-01 00:00:00
abstract::Local Defect Resonance (LDR) is exploited for non-destructive testing (NDT) by using ultrasonic vibrations to get a localized resonant activation of defected zones. The LDR technique relies on the local stiffness difference between the defect and the sound material. Analyzing the structure's displacement field at this...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2020.106130
更新日期:2020-07-01 00:00:00
abstract::During the last decade, the introduction of ultrasound techniques in arc welding with the intention of improving the operational performance and technical characteristics of the welding processes have been studied intensively. In this work is presented a broad review of the literature surrounding the utilization of th...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2014.10.007
更新日期:2015-02-01 00:00:00
abstract::The purpose of this study is to evaluate whether a 5-repetition liver stiffness (LS) measurement as the standard protocol of shear wave elastography (SWE) is comparable to a conventional 10-repetition measurement protocol and to identify factors that influence the reliability of the 5-repetition protocol. A total of 3...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2016.08.005
更新日期:2016-12-01 00:00:00
abstract::In order to investigate non-destructively the bonding between rough plates, the problem of Lamb waves propagating on a rough plate is addressed in this paper. Numerical analysis is performed on periodical gratings made of identical triangular grooves. If the surface profile is made up of grooves with one periodicity, ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.05.052
更新日期:2006-12-22 00:00:00
abstract::This paper is concerned with the probing of the transversal envelope solitons propagation in circular waveguides when a set of requirements (non-linearity and dispersion) are fulfilled in the waveguide and balanced. The basic idea is to analyze the shape of an acoustic pulse after it has traveled one or few trips thro...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2014.01.016
更新日期:2014-07-01 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::Fundamental understanding of ultrasound interaction with material discontinuities having closed interfaces has many engineering applications such as nondestructive evaluation of defects like kissing bonds and cracks in critical structural and mechanical components. In this paper, to analyze the acoustic field nonlinea...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2017.12.007
更新日期:2018-03-01 00:00:00
abstract::An inversion algorithm (termed AEDep) is proposed for estimating the depth of acoustic emission (AE) sources in plate-like structural components. The work is motivated by the need for characterizing early-stage fatigue crack growth in such components. The algorithm achieves depth estimation by automatically extracting...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2019.105975
更新日期:2019-11-01 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
abstract::In this paper, te edge mode variation is studied with three different methods: the reciprocal work method, already used by Torvik [J. Acoust. Soc. Am. 41 (1967) 346] to model this phenomenon, the S-parameter method and a finite element model that are applied for the first time to the study of the edge resonance. Moreo...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00391-8
更新日期:2003-01-01 00:00:00
abstract::This paper presents the experimental study of a miniaturized surface acoustic waves (SAWs) rotary motor and the theoretical calculation. After the first success in SAW rotary motor operating at 9.85 MHz, a smaller rotary motor is designed. With the operating frequency of 30 MHz and the driving voltage of 120 V(p-p), t...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00264-0
更新日期:2002-06-01 00:00:00
abstract::State-of-the-art integrally stiffened composite materials, manufactured for use in the next generation of commercial and military aircraft, are increasingly being used for structural components such as wings and fuselages. However, the complexity of the manufacturing processes can produce small variations in the shape...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00254-8
更新日期:2002-12-01 00:00:00
abstract::Sonoelectrochemistry is undergoing a reemerging activity in the last years with an increasing number of papers appearing in a wide range of peer review journals. Applied studies which cover environmental treatments, synthesis or characterization of nanostructures, polymeric materials synthesis, analytical procedures, ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2009.09.022
更新日期:2010-02-01 00:00:00
abstract::This paper presents an original experimental and numerical investigation of acoustic streaming driven by an acoustic beam reflecting on a wall. The water experiment features a 2 MHz acoustic beam totally reflecting on one of the tank glass walls. The velocity field in the plane containing the incident and reflected be...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2016.02.003
更新日期:2016-05-01 00:00:00
abstract::This paper investigates the use of magnetically active materials in the matching layer of a piezoelectric transducer. This then allows the performance of the device to be dynamically altered by applying an external field. The effect that this new matching layer has on the performance of a typical device is theoretical...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2007.08.002
更新日期:2007-12-01 00:00:00
abstract::This work was devoted to the development of a health monitoring system assigned to aerospace applications. Those applications concerned the detection of damaging impacts and debonding between stiffeners and composite skins, since they are the major causes of in-service damage of aircraft structures. The chosen health ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2004.01.058
更新日期:2004-04-01 00:00:00