Laser-based ultrasonic inspection with a fiber-coupled scanning Cassegrain system.

abstract：:The dispersion behavior of waves in multiferroic plates with imperfect interfacial bonding has been investigated via the method of reverberation-ray matrix, which is directly established from the three-dimensional equations of magneto-electro-elasticity in the form of state space formalism. A generalized spring-layer ...

journal_title：Ultrasonics

authors： Zhu J,Chen W,Ye G

更新日期：2012-01-01 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

authors： Alekou T,Giannakou M,Damianou C

更新日期：2021-02-01 00:00:00

abstract：:The propagation of non-axisymmetric guided waves in larger diameter pipes is studied in this paper by treating the guided waves as corresponding Lamb waves in an unwrapped plate. This approximation leads to a simpler method for calculating the phase velocities of hollow cylinder guided waves, which reveals a beam focu...

journal_title：Ultrasonics

authors： Li J,Rose JL

更新日期：2006-01-01 00:00:00

abstract：:The wear behaviors of grinding wheel have significant influence on the work-surface topography. However, a comprehensive and quantitative method is lacking for evaluating the wear conditions of grinding wheel. In this paper, a fractal analysis method is used to investigate the wear behavior of resin-bonded diamond whe...

journal_title：Ultrasonics

authors： Wang Q,Zhao W,Liang Z,Wang X,Zhou T,Wu Y,Jiao L

更新日期：2018-03-01 00:00:00

abstract：:In many ultrasonic applications frictional effects play an important role (e.g. ultrasonic machining, ultrasonic motors). For optimising the applications in terms of quality, efficiency and lifetime it is important to understand the frictional coupling of the vibrating and the non-vibrating part. This contribution is ...

journal_title：Ultrasonics

authors： Storck H,Littmann W,Wallaschek J,Mracek M

更新日期：2002-05-01 00:00:00

abstract：:Elastography is an imaging technique based on strain estimation in soft tissues under quasi-static compression. The stress is usually created by a compression plate, and the target is imaged by an ultrasonic linear array. This configuration is used for breast elastography, and has been investigated both theoretically ...

journal_title：Ultrasonics

authors： Souchon R,Soualmi L,Bertrand M,Chapelon JY,Kallel F,Ophir J

更新日期：2002-05-01 00:00:00

abstract：:Effective receive beamforming in medical ultrasound imaging is important for enhancing spatial and contrast resolution. In current ultrasound receive beamforming, a constant sound speed (e.g., 1540m/s) is assumed. However, the variations of sound speed in soft tissues could introduce phase distortions, leading to degr...

journal_title：Ultrasonics

authors： Yoon C,Lee Y,Chang JH,Song TK,Yoo Y

更新日期：2011-10-01 00:00:00

abstract：:The objective of this study was to examine the potential of ultrasonic velocity as a rapid and nondestructive method to predict the dimensional stability of oak (Quercus petraea (Mattuschka) Lieblein) and chestnut (Castanea sativa Mill.) that are commonly used in flooring industry. Ultrasonic velocity, specific gravit...

journal_title：Ultrasonics

authors： Dündar T,Wang X,As N,Avcı E

更新日期：2016-03-01 00:00:00

abstract：:An experimental ultrasonic sonar for use as a sensory aid with blind children is described. Novel signal processing techniques make the aid relatively simple to construct, yet allow many of its parameters to be changed in the field. In particular, the aid has two features, a variable range code and an automatic level...

journal_title：Ultrasonics

authors： Boys JT,Strelow ER,Clark GR

更新日期：1979-01-01 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

authors： Vijaya Kumar RL,Bhat MR,Murthy CR

更新日期：2013-08-01 00:00:00

abstract：:This paper presents a study on the wave surfaces of anisotropic solids. In addition to the classical and real rays, which are defined by the normal to the slowness surfaces, it is obtained complex rays, which are associated to specific inhomogeneous plane waves. Referring to the complex Christoffel's equation and to t...

journal_title：Ultrasonics

authors： Deschamps M,Poncelet O

更新日期：2002-05-01 00:00:00

abstract：:Traditional rotary corers and sample retrieval mechanisms for planetary drilling suffer from a variety of technical difficulties. A heavy and rigid drillstring must be assembled on-site and deployed with considerable applied preload and torque, and these mechanical loadings are difficult to react in a low gravity envi...

journal_title：Ultrasonics

authors： Harkness P,Lucas M,Cardoni A

更新日期：2011-12-01 00:00:00

abstract：:This paper presents the results of the theoretical and 2D FEM modeling excitation and detection of evanescent acoustic waves in piezoelectric plates. By application of 2D ordinary differential equations derived by Auld, we obtained the dispersion curves of A1 and SH1 waves in YX LiNbO3 and YX KNbO3 plates in proximity...

journal_title：Ultrasonics

authors： Kuznetsova I,Nedospasov I,Smirnov A,Qian ZH,Wang B,Dai XY

更新日期：2019-11-01 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

authors： Li J,Yang L,Rokhlin SI

更新日期：2014-09-01 00:00:00

abstract：:The location of continuous acoustic emission sources is a difficult problem of non-destructive testing. This article describes one-dimensional location of continuous acoustic emission sources by using an intelligent locator. The intelligent locator solves a location problem based on learning from examples. To verify w...

journal_title：Ultrasonics

authors： Kosel T,Grabec I I,Muzic P

更新日期：2000-03-01 00:00:00

abstract：:Skeletal muscle is an important secretory organ in mammals, producing myriad chemical mediators ("myokines") with distinct biological action in different tissues, including anti-inflammatory activity. Extracellular vesicles (EVs) have recently been identified as a mode of myokine transport from muscle, facilitating su...

journal_title：Ultrasonics

authors： Maeshige N,Langston PK,Yuan ZM,Kondo H,Fujino H

更新日期：2021-02-01 00:00:00

abstract：BACKGROUND:Generalized coherence factor (GCF) can be adaptively estimated from channel data to suppress sidelobe artifacts. Conventionally, Fast Fourier Transform (FFT) is utilized to calculate the full channel spectrum and suffers from high computation load. In this work, autocorrelation (AR)-based algorithm is utiliz...

journal_title：Ultrasonics

authors： Shen CC,Xing YQ,Jeng G

更新日期：2016-12-01 00:00:00

abstract：:We demonstrate a new method for a real-time imaging of surface acoustic waves at frequencies up to 1 GHz with picosecond temporal and micron spatial resolutions using an ultrafast optical pump and probe technique combined with a common path interferometer. Using samples with isotropic or anisotropic substrates coated ...

journal_title：Ultrasonics

authors： Sugawara Y,Wright OB,Matsuda O,Gusev VE

更新日期：2002-05-01 00:00:00

abstract：:The Total Focusing Method (TFM) yields a focused image in emission and in reception while Phased Array (PA) imaging provides Dynamic Depth Focusing (DDF) in reception only. Besides, most NDE applications have two propagation media, where refraction at the interface complicates time-of-flight (TOF) and focal law comput...

journal_title：Ultrasonics

authors： Cruza JF,Camacho J,Mateos R,Fritsch C

更新日期：2019-11-01 00:00:00

abstract：:The study is aimed to perform dynamic modeling of a part feeder powered by piezoelectric actuation. This part feeder consists mainly of a horizontal platform vibrated by a pair of parallel piezoelectric bimorph beams. Owing to intermittent impacts with the platform, the transported part on the platform is able to marc...

journal_title：Ultrasonics

authors： Chao PC,Shen CY

更新日期：2007-06-01 00:00:00

abstract：:Conventionally, the ultrasonic polar scan (UPS) records the amplitude or time-of-flight in transmission using short ultrasonic pulses for a wide range of incidence angles, resulting in a fingerprint of the critical bulk wave angles of the material at the insonified spot. Here, we investigate the use of quasi-harmonic ...

journal_title：Ultrasonics

authors： Kersemans M,Martens A,Van Den Abeele K,Degrieck J,Pyl L,Zastavnik F,Sol H,Van Paepegem W

更新日期：2015-04-01 00:00:00

abstract：:The frequency dependence of H2O2 generation from H2O by a sonochemical reaction was detected experimentally. The results are in good agreement with previous experimental results, which indicate that in sonochemical reactions, frequencies higher than 90 kHz are more effective than frequencies of several tens of kiloher...

journal_title：Ultrasonics

authors： Sato M,Itoh H,Fujii T

更新日期：2000-03-01 00:00:00

abstract：:The main component of every device used for investigating internal object structure by Ultrasound Transmission Tomography (UTT) is a special ultrasonic probe. This paper presents the structure of model multielement ring probe for examining objects using this method in divergent ray projection geometry. The probe is ma...

journal_title：Ultrasonics

authors： Gudra T,Opielinski KJ

更新日期：2006-12-22 00:00:00

abstract：:This paper presents a new method of measuring dispersion curves of leaky Lamb waves propagating in a thin plate. The measurement system is based on a lens-less line-focus transducer and its defocusing measurement technique. A new waveform processing method known as V(f, z) method is introduced for analyzing the measur...

journal_title：Ultrasonics

authors： Lee YC

更新日期：2001-06-01 00:00:00

abstract：:Experimental results of ultrasound of varying frequency (0.8-5.0 MHz) propagating in cold drawn wires of stainless steel and aluminium ranging in diameter from 0.25 to 1.21 mm are in close agreement with theoretical predictions. This agreement is maintained when the coupling medium between the wire and the ultrasound ...

journal_title：Ultrasonics

authors： Nicholson NC,McDicken WN,Anderson T

更新日期：1989-03-01 00:00:00

abstract：:Clinical ultrasound images are often perceived as difficult to interpret due to image blurring and speckle inherent in the ultrasound imaging. But the image quality can be improved by deconvolution using an estimate of the point-spread function. However, it is difficult to obtain a sufficiently accurate estimate of th...

journal_title：Ultrasonics

authors： Shin HC,Prager R,Ng J,Gomersall H,Kingsbury N,Treece G,Gee A

更新日期：2009-03-01 00:00:00

abstract：:The method of wave function expansion is adopted to study the three dimensional scattering of a time-harmonic plane progressive sound field obliquely incident upon a multi-layered hollow cylinder with interlaminar bonding imperfection. For the generality of solution, each layer is assumed to be cylindrically orthotrop...

journal_title：Ultrasonics

authors： Rajabi M,Hasheminejad SM

更新日期：2009-12-01 00:00:00

abstract：:The Synthetic Aperture Focusing (SAF) technique makes it possible to achieve a higher and more uniform quality of ultrasound images throughout depth, as if both transmit and receive dynamic focusing were applied. In this work we combine a particular implementation of SAF, called Synthetic Transmit Aperture (STA) techn...

journal_title：Ultrasonics

authors： Matrone G,Savoia AS,Caliano G,Magenes G

更新日期：2017-03-01 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

authors： Choi SH,Jeong WK,Kim Y,Lim S,Kwon JW,Kim TY,Kim MY,Sohn JH

更新日期：2016-12-01 00:00:00

abstract：:In the present paper, we report the first results concerning a centimetre cantilever driven through non-linear effects in thin magnetostrictive films. Bimorph centimetre beams (24 mm x 5 mm) were designed using 160 microns thick glass and 0.4 micron thick multilayer TbFe/Fe films deposited via RF sputtering, using sev...

journal_title：Ultrasonics

authors： Tiercelin N,Pernod P,Preobrazhensky V V,Le Gall H,Ben Youssef J

更新日期：2000-03-01 00:00:00