Littérature scientifique sur le sujet « ULTRASONIC APPLICATIONS »

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Articles de revues sur le sujet "ULTRASONIC APPLICATIONS"

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Lucas, M., A. Gachagan et A. Cardoni. « Research applications and opportunities in power ultrasonics ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 223, no 12 (21 octobre 2009) : 2949–65. http://dx.doi.org/10.1243/09544062jmes1671.

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The first applications in power ultrasonics were largely focused on ultrasonic cleaning baths, which rely on generating inertial cavitation, and the incorporation of ultrasonic excitation in manufacturing processes such as joining of plastics and metals. Since the early days of power ultrasonics there has been a rapid growth in the number of applications, and the diversified range of applications, from microwelding to ultrasonic osteotomy, has been made possible by a combination of advances in experimental techniques for characterizing low ultrasonic frequency vibrations and acoustics, and advances in computational modelling. This article highlights just some of the research in power ultrasonics that aims to exploit the benefits of low ultrasonic frequency high ultrasonic amplitude vibrations. This article reports current research and suggests future opportunities in three different application areas that have seen significant recent advances: joining and shaping of metals, surgical devices, and cavitation cells.
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Mulet, A., J. Benedito, J. Bon et N. Sanjuan. « Review : Low intensity ultrasonics in food technology / Revisión : Ultrasonidos de baja intensidad en tecnología de alimentos ». Food Science and Technology International 5, no 4 (août 1999) : 285–97. http://dx.doi.org/10.1177/108201329900500401.

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Ultrasonic applications can be classified into low intensity or high intensity applications. The latter are used to modify a process or product with ultrasonics, while in low intensity applications the process or product modifies the ultrasonic signal, thus providing information about the product. Low inten sity ultrasonics in food technology can be used to monitor a process (liquid level, flowmeters) or to determine the quality of food products. Since ultrasonic techniques are rapid, non-destructive, easy to automate and relatively inexpensive, the number of applications is rapidly growing in this field. Ultrasonics can also be considered for use in laboratory testing devices to determine physical and chemical properties of foods. Ultrasonics has been used to determine texture, composition and physical state in liquid and solid foods. The commonly measured ultrasonic parameters are velocity, attenua tion and frequency spectrum composition. Velocity is the parameter used most since it is the simplest and most reliable measurement. This paper reviews the basic principles of ultrasonics, the most suit able techniques for each type of application, the testing devices needed to make measurements and the most interesting applications.
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Lucas, Margaret, Andrea Cardoni, E. McCulloch, G. Hunter et Alan MacBeath. « Applications of Power Ultrasonics in Engineering ». Applied Mechanics and Materials 13-14 (juillet 2008) : 11–20. http://dx.doi.org/10.4028/www.scientific.net/amm.13-14.11.

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Applications of power ultrasonics in engineering are growing and now encompass a wide variety of industrial processes and medical procedures. In the field of power ultrasonics, ultrasonic vibrations are used to effect a physical change in a medium. However, the mechanism by which a process can benefit from power ultrasonics is not common for all applications and can include one or more of such diverse mechanisms as acoustic cavitation, heating, microfracture, surface agitation and chemical reactions. This paper presents two applications of power ultrasonics involving some of these different characteristics by concentrating on two case studies involving material failure (ultrasonic cutting) and acoustic cavitation (bacterial inactivation).
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Zhu, Yong Wei, Xing Lei Miao et Chao Feng Zhang. « Precise-Micro PECM System and its Applications Combining Synchronizing Ultrasonical Vibration ». Advanced Materials Research 295-297 (juillet 2011) : 834–39. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.834.

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The micro-PECM (Pulse Electrochemical Machining) combining synchronous ultrasonic vibration is proposed as a new technology for to solve the difficulty machining problems of conductive hard and tough materials. The feasibility of micro-PECM combining synchronous ultrasonic vibration is studied. The synchronous way is analyzed; the synchronous electrical circuit is designed and made. The synchronous electrochemical micro-machining system combining ultrasonical vibration are built and improved,which machining parameters can be adjusted in a wide ranges, and the synchronous target of the ultrasonical vibration with the voltage of micro-PECM can be realized. The micro-machining electrodes are manufactured in different sections and sizes by combined electrical discharge machining. The mechanism tests of micro-PECM are carried, which kentaniums (YBD151、YG8)and stainless steel are machined and the results are analyzed and discussed. Contrast with the single micro-USM, the micro-PECM combining ultrasonic vibration has high productivity, good machining accuracy and surface quality; furthermore, its cathode wastage is low. The micro-PECM combining synchronous ultrasonic vibration has the best machining precision and surface quality.
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Dixon, Steve, et Stuart B. Palmer. « OS02W0325 Non-contact ultrasonic measurements for manufacturing applications ». Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2003.2 (2003) : _OS02W0325. http://dx.doi.org/10.1299/jsmeatem.2003.2._os02w0325.

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Wang, Z. W., G. Q. Pan et Dong Hui Wen. « Applications of Ultrasonic Radiation Forces ». Advanced Materials Research 215 (mars 2011) : 259–62. http://dx.doi.org/10.4028/www.scientific.net/amr.215.259.

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This keynote paper aims at introducing applications of ultrasonic radiation force in industry. The chosen focus is to understand how to use it. Since the phenomenon of acoustic levitation can reflect the exciting of ultrasonic radiation force directly. The paper starts with an analysis on the tungsten ball floating on a sound field and ultrasonic micro-manipulation study in micro Electronic Mechanical System (MEMS). And ultrasound has been successfully used to degrade wastewater as its cavitation. At the same time, different kinds of micro-ultrasonic machining were used to show how exciting machining and ultrasonic radiation combined. A view from the authors and the final Conclusions show future applications of ultrasonic radiation force.
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ZEQIRI, B. « Metrology for ultrasonic applications ». Progress in Biophysics and Molecular Biology 93, no 1-3 (janvier 2007) : 138–52. http://dx.doi.org/10.1016/j.pbiomolbio.2006.07.023.

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Thomas, Hywel R. « Peter Neil Temple Wells CBE. 19 May 1936—22 April 2017 ». Biographical Memoirs of Fellows of the Royal Society 66 (13 février 2019) : 463–77. http://dx.doi.org/10.1098/rsbm.2018.0022.

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Peter Wells will be remembered internationally for his many outstanding contributions in the field of medical ultrasound. He pioneered the development of non-invasive imaging techniques in the development of ultrasonics as a diagnostic and surgical tool. He was the originator and developer of instruments for ultrasonic surgery and ultrasonic power measurement, as well as the two-dimensional, articulated-arm ultrasonic general purpose scanner and the water-immersion ultrasonic breast scanner. He demonstrated ultrasonic-pulsed Doppler range-gating, and was the discoverer of the ultrasonic Doppler signal characteristic of malignant tumour neovascularization. He investigated ultrasonic bioeffects and formulated ultrasonic safety guidelines and conditions for prudent use of ultrasonic diagnosis. His outstanding and sustained achievements in the medical applications of ultrasound extend continuously from the 1960s until a few days before his death at the age of 80. Anyone who has ever benefited from an ultrasound procedure owes a debt of gratitude to Peter Wells.
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Singh, Kanwal Jit, Inderpreet Singh Ahuja et Jatinder Kapoor. « Ultrasonic, chemical-assisted ultrasonic and rotary ultrasonic machining of glass : a review paper ». World Journal of Engineering 15, no 6 (3 décembre 2018) : 751–70. http://dx.doi.org/10.1108/wje-04-2018-0114.

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PurposeThis review paper reveals the literature on ultrasonic, chemical-assisted ultrasonic and rotary ultrasonic machining (USM) of glass material. The purpose of this review paper is to understand and describe the working principle, mechanism of material removal, experimental investigation, applications and influence of input parameters on machining characteristics. The literature reveals that the ultrasonic machines have been generally preferred for the glass and brittle work materials. Some other non-traditional machining processes may thermally damage the work surface. Through these USM, neither thermal effects nor residual stresses have been generated on the machined surface.Design/methodology/approachVarious input parameters have the significant role in machine performance characteristics. For the optimization of output response, several input parameters have been critically investigated by the various researcher.FindingsSome advance types of glasses such as polycarbonate bulletproof glass, acrylic heat-resistant glass and glass-clad polycarbonate bulletproof glass still need some further investigation because these materials have vast applications in automobile, aerospace and space industries.Originality/valueReview paper will be beneficial for industrial application and the various young researcher. Paper reveals the detail literature review on traditional ultrasonic, chemical assisted ultrasonic and rotary USM of glass and glass composite materials.
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Tomikawa, Y., T. Ogasawara et A. Takano. « Ultrasonic motors—constructions/characteristics/applications ». Ferroelectrics 91, no 1 (mars 1989) : 163–78. http://dx.doi.org/10.1080/00150198908015736.

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Thèses sur le sujet "ULTRASONIC APPLICATIONS"

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Guldiken, Rasim Oytun. « Dual-electrode capacitive micromachined ultrasonic transducers for medical ultrasound applications ». Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/31806.

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Thesis (Ph.D)--Mechanical Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Degertekin, F. Levent; Committee Member: Benkeser, Paul; Committee Member: Berhelot, Yves; Committee Member: Brand, Oliver; Committee Member: Hesketh, Peter. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Ciulla, M. M. « Ultrasonic myocardial tissue characterization : clinical applications ». Doctoral thesis, Università degli Studi di Milano, 2001. http://hdl.handle.net/2434/49004.

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Hopko, Sandra N. « Laser ultrasonic probe for industrial or high temperature applications ». Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16433.

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Ashraf, Muhammad. « A 3D ultrasonic camera for subsea applications ». Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318304.

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Johansson, Patrick. « Capacitive Micromachined Ultrasonic Transducers for Underwater Applications ». Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447067.

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Capacitive micromachined ultrasonic transducers (CMUT:s) are often used in medical imaging and they show some promise as underwater transducers. This thesis collates the available information about how CMUT:s operate, their strengths and weaknesses and investigates their efficiency as an underwater transducer. The accumulated knowledge was channelled into a simulation of a CMUT as a dampened spring system done in MATLAB and Simulink. The simulation investigated the resonance frequency and bandwidth through simulation and compared the results to experimental results from literature.  CMUT:s have good acoustic matching with water making them sensitive, broadband transducers when used under water. Special care must be taken when choosing the CMUT so that materials and designs can fulfil the task for which it is intended, such as the radius of the membrane, the material of the membrane, the insulating layers in or around the CMUT and the height of the air gap inside. CMUT:s are, for the transmission of sound, less capable than existing lead zirconate-titanate-transducers (PZT-transducers). This problem can be somewhat alleviated through operating the CMUT in collapse-mode but care must be taken so that the CMUT is not damaged during this operation. Simulation results and results from literature show that it is possible to simulate CMUT:s with accuracy. By simulating 10 different CMUT:s, using the geometries and material properties of experimentally tested devices and testing for resonance frequency and bandwidth the results were as follows:The average relative error of resonance frequency was found to be -14 %, if outlier results are excluded and the average relative error of bandwidth proved inaccurate at -54 %
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McLean, Jeffrey John. « Interdigital Capacitive Micromachined Ultrasonic Transducers for Microfluidic Applications ». Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/7625.

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The goal of this research was to develop acoustic sensors and actuators for microfluidic applications. To this end, capacitive micromachined ultrasonic transducers (cMUTs) were developed which generate guided acoustic waves in fluid half-spaces and microchannels. An interdigital transducer structure and a phased excitation scheme were used to selectively excite guided acoustic modes which propagate in a single lateral direction. Analytical models were developed to predict the geometric dispersion of the acoustic modes and to determine the sensitivity of the modes to changes in material and geometric parameters. Coupled field finite element models were also developed to predict the effect of membrane spacing and phasing on mode generation and directionality. After designing the transducers, a surface micromachining process was developed which has a low processing temperature of 250C and has the potential for monolithically integrating cMUTs with CMOS electronics. The fabrication process makes extensive use of PECVD silicon nitride depositions for membrane formation and sealing. The fabricated interdigital cMUTs were placed in microfluidic channels and demonstrated to sense changes in fluid sound speed and flow rate using Scholte waves and other guided acoustic modes. The minimum detectable change in sound speed was 0.25m/s, and the minimum detectable change in flow rate was 1mL/min. The unique nature of the Scholte wave allowed for the measurement of fluid properties of a semi-infinite fluid using two transducers on a single substrate. Changes in water temperature, and thus sound speed, were measured and the minimum detectable change in temperature was found to be 0.1C. For fluid pumping, interdigital cMUTs were integrated into microchannels and excited with phase-shifted, continuous wave signals. Highly directional guided waves were generated which in turn generated acoustic streaming forces in the fluid. The acoustic streaming forces caused the fluid to be pumped in a single, electronically-controlled direction. For a power consumption of 43mW, a flow rate of 410nL/min was generated against a pressure of 3.4Pa; the thermodynamic efficiency was approximately 5x10-8%. Although the efficiency and pressure head are low, these transducers can be useful for precisely manipulating small amounts of fluid around microfluidic networks.
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Kalem, Volkan. « Development Of Piezoelectric Ceramics For Ultrasonic Motor Applications ». Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612935/index.pdf.

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This study has been carried out to develop and manufacture piezoelectric ceramic materials which are utilized for ultrasonic motor (USM) applications. For this purpose, the effect of compositional modifications on the dielectric and piezoelectric properties of lead zirconate titanate (PZT) based ceramics was investigated. PZT based powders were produced using the mixed oxide method. The base composition was selected as Pb(Zr0.54Ti0.46)O3. The samples in the proximity of morphotrophic phase boundary were doped with strontium, lanthanum, lead manganese niobate (PMnN) and lead manganese antimonate (PMS) in order to improve the structural characteristics and electromechanical properties which are very important for USM applications. The dielectric constant, planar coupling coefficient, mechanical quality factor, piezoelectric strain constant and tangent loss values were evaluated in accordance with standard IRE (Institute of Radio Engineers) test procedures. The results on dielectric and piezoelectric properties showed that piezoelectric ceramics with high mechanical quality factor, high piezoelectric strain constant and low tangent loss could be produced by using the aforementioned dopants. As a result, a new piezoelectric ceramic named as 0.97[PSLZT]-0.024[PMnN]-0.006[PMS] was produced with KT= 1913, Qm= 1240, d33= 540 pC/N, tan delta= 0.89%, kp= 0.57 and Tc= 235 °
C. This composition is a good candidate for high power applications. The ceramic samples with the developed compositions were used to produce an ultrasonic-wave type motor and the performance of the USM was evaluated in terms of speed, torque and efficiency.
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Wang, Kevin John 1981. « An ultrasonic compass for context-aware mobile applications ». Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/16689.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
Includes bibliographical references (p. 95-96).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
If we are to realize the everyday benefits promised by pervasive computing and context-aware applications, we must first develop the infrastructure to provide contextual location and orientation information through pervasive computing elements. I lay the foundations for leveraging the Cricket indoor location system to supply orientation information. I first characterize the use of ultrasound in Cricket for distance and orientation measurements. I then propose a set of methods to calculate 3-DOF orientation from an array of well placed ultrasonic sensors operating in the Cricket system. I design and implement a prototype of this Cricket Compass using a combination of hardware and software and demonstrate end-to-end functionality of the system.
by Kevin John Wang.
M.Eng.
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Deroo, Frederik. « Damage detection in concrete using diffuse ultrasound measurements and an effective medium theory for wave propagation in multi-phase materials ». Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31801.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2010.
Committee Chair: Laurence J. Jacobs; Committee Member: Jianmin Qu; Committee Member: Jin-Yeon Kim. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Swacek, Christian Bernhard. « Optical generation of tone-burst Rayleigh surface waves for nonlinear ultrasonic measurements ». Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45812.

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Conventional contact ultrasonic methods suffer from large variability, which is known to originate from a number of sources such as coupling variability, and the surface roughness at the transducer/specimen interface. The inherently small higherharmonic signals can be significantly influenced by the changes in contact conditions, especially in nonlinear ultrasonic measurements. For this reason, the noncontact generation and detection techniques are very attractive. This research first focuses on the optical generation of tone-burst surface acoustic waves in a metallic specimen. Two methods that use laser light as an optical source are compared for generating surface acoustics waves in the 5 MHz range. Both the shadow mask and diffraction grating are used to convert a laser pulse to a tone-burst signal pattern on the specimen. The generated signals are detected by a wedge transducer at a fixed location and then the harmonic contents in the generated signals and the repeatability of the methods are evaluated. Finally, the developed method is used to characterize the material nonlinearity of aluminum (Al 6061) and steel (A36). The results showed repeatable measurements for ablative signal excitation on aluminum.
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Livres sur le sujet "ULTRASONIC APPLICATIONS"

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Ultrasonics : Fundamentals, technology, applications. 2e éd. New York : M. Dekker, 1988.

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E, Drain L., dir. Laser ultrasonics : Techniques and applications. Bristol, England : A. Hilger, 1990.

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Kočiš, Štefan. Ultrasonic Measurements and Technologies. Boston, MA : Springer US, 1996.

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service), SpringerLink (Online, dir. Ultrasonic Motors : Technologies and Applications. Berlin, Heidelberg : Springer-Verlag Berlin Heidelberg, 2011.

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Povey, M. J. W. Ultrasonic techniques for fluids characterization. San Diego : Academic Press, 1997.

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Dale, Ensminger, et Stulen Foster B, dir. Ultrasonics : Fundamentals, technology, applications. Boca Raton : Taylor & Francis, 2009.

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Asher, R. C. Ultrasonic sensors for chemical and process plant. Bristol : Institute of Physics Pub., 1997.

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Fundamentals and applications of ultrasonic waves. 2e éd. Boca Raton : CRC Press, 2012.

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1942-, Harness Jay K., et Wisher Dennis B, dir. Ultrasound in surgical practice : Basic principles and clinical applications. New York : Wiley-Liss, 2001.

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M, Kepple Donna, dir. Diagnostic sonography : Principles and clinical applications. 2e éd. Philadelphia : W.B. Saunders, 1995.

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Chapitres de livres sur le sujet "ULTRASONIC APPLICATIONS"

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Zhao, Chunsheng. « Applications of Ultrasonic Motors in Engineering ». Dans Ultrasonic Motors, 448–69. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-15305-1_15.

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Uchino, Kenji. « Ultrasonic Motor Applications ». Dans Micro Mechatronics, 465–522. Second edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2019. |Includes biblographical references and index. : CRC Press, 2019. http://dx.doi.org/10.1201/9780429260308-10.

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Uchino, Kenji. « Ultrasonic Motor Applications ». Dans Piezoelectric Actuators and Ultrasonic Motors, 265–312. Boston, MA : Springer US, 1997. http://dx.doi.org/10.1007/978-1-4613-1463-9_9.

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González, Gilberto, Lorenzo Leija et Roberto Muñoz. « Ultrasonic Hyperthermia ». Dans Piezoelectric Transducers and Applications, 241–54. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05361-4_15.

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Jones, J. P. « Applications of Acoustical Microscopy in Dermatology ». Dans Ultrasonic Tissue Characterization, 201–16. Tokyo : Springer Japan, 1996. http://dx.doi.org/10.1007/978-4-431-68382-7_11.

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Leong, Thomas Seak Hou, Sivakumar Manickam, Gregory J. O. Martin, Wu Li et Muthupandian Ashokkumar. « Applications of Ultrasonic Emulsification ». Dans SpringerBriefs in Molecular Science, 23–32. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73491-0_3.

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Hao, Zhanjun, Yuejiao Wang, Daiyang Zhang et Xiaochao Dang. « UltrasonicG : Highly Robust Gesture Recognition on Ultrasonic Devices ». Dans Wireless Algorithms, Systems, and Applications, 267–78. Cham : Springer Nature Switzerland, 2022. http://dx.doi.org/10.1007/978-3-031-19214-2_22.

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Battaglini, Luigi, Sergio Callegari, Salvatore Caporale, Lee Andrew John Davis, Stefano Laureti, Luca Senni et David Arthur Hutchins. « Industrial Applications of Noncontact Ultrasonics Techniques ». Dans Ultrasonic Nondestructive Evaluation Systems, 271–95. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10566-6_11.

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Carcangiu, Sara, Augusto Montisci et Mariangela Usai. « Modeling Ultrasounds for Nondestructive Testing Applications ». Dans Ultrasonic Nondestructive Evaluation Systems, 47–82. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10566-6_3.

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Uchino, Kenji. « Servo Displacement Transducer Applications ». Dans Piezoelectric Actuators and Ultrasonic Motors, 217–44. Boston, MA : Springer US, 1997. http://dx.doi.org/10.1007/978-1-4613-1463-9_7.

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Actes de conférences sur le sujet "ULTRASONIC APPLICATIONS"

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Frederic, Coutard, Schweitzer Patrick et Tisserand Etienne. « Smart generator for ultrasonic applications ». Dans IECON 2006. 32nd Annual Conference on IEEE Industrial Electronics. IEEE, 2006. http://dx.doi.org/10.1109/iecon.2006.347665.

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Vukonic, Luka, et Mladen Tomic. « Ultrasonic Sensors in IoT Applications ». Dans 2022 45th Jubilee International Convention on Information, Communication and Electronic Technology (MIPRO). IEEE, 2022. http://dx.doi.org/10.23919/mipro55190.2022.9803772.

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Karaboce, Baki, Mithat Ozdingis, Huseyin Okan Durmus et Emel Cetin. « Load Cell Based Ultrasonic Wattmeter For Ultrasonic Probe Calibration ». Dans 2019 IEEE International Symposium on Medical Measurements and Applications (MeMeA). IEEE, 2019. http://dx.doi.org/10.1109/memea.2019.8802149.

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Chang, Ming-Wei, Tse-Ming Deng, Te-I. Chiu et Mu-Yue Chen. « Polymer-Based Resonator for Ultrasonic Imagine Applications ». Dans 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21496.

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Capacitive micromachined resonator for ultrasonic imaging technology is a prime candidate for next generation ultrasonic imaging transducers. Medical and healthcare imaging and the physiotherapy societies have expressed growing interest in capacitive micromachined resonator over the years. This paper focuses on polymer based fabrication technologies for capacitive ultrasonic resonator using in imaging applications. In this paper, the design, simulation, and fabrication results of a polymer based resonator for airborne ultrasonic application are presented. Due to its outperformance in terms of processing temperature and cost, this paper will also introduces the new concept in detail about sacrificial layer release processes during the fabrication of a polymer vibratile membrane. Process variations are compared qualitatively and quantitatively whenever possible. Through these study, it was concluded that polymer resonator technology was superior in terms of process control, yield, and uniformity. Because the number of steps and consequent process time were reduced, turn-around time was improved significantly. Furthermore, a resonator array was then designed and fabricated with a target DC actuation voltage of less than 20V with a resonance frequency at 1.7 MHz. The experimental results showed the potential of this resonator for healthcare imaging and the airborne applications in physiotherapy.
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Fink, Mathias. « Biomedical Applications of Ultrasonic Time-reversal ». Dans Biomedical Optics. Washington, D.C. : OSA, 2012. http://dx.doi.org/10.1364/biomed.2012.bsu1a.2.

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Nguyen, Thompson Vu, Simone Sternini et Francesco Lanza di Scalea. « 3D Ultrasonic Imaging Applications on Rails ». Dans 2016 Joint Rail Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/jrc2016-5760.

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In current rail inspection processes, following a detection of a suspected internal defect, an additional secondary detailed inspection is required to (1) confirm the presence of the flaw and (2) determine the severity of the flaw to allow for optimal post-detection rail maintenance planning. Current ultrasonic devices in this secondary inspection efforts heavily rely the expertise and experience of the test personnel’s judgement to confirm the rail flaw and to characterize the internal defect by analyzing reflected waveforms. To eliminate the uncertainties in this secondary inspection process and to provide the testing operators with better defect characterization such as the size and location of the flaw, a defect ultrasonic imaging device utilizing synthetic aperture focusing (SAF) techniques is proposed in this paper. These imaging techniques have been successfully demonstrated in medical imaging, providing quantitative characterization of internal components, allowing for a better prognosis. Ultimately, having a quantitative evaluation of the internal flaw can lead to an increase in the safety of train operations by preventing derailments. Thus, in this paper, a preliminary portable rail defect imaging concept is proposed by the University of California, San Diego, to provide three dimensional images of internal defects in the rail. The prototype reconstructs a three-dimensional volumetric image of the rail, utilizing multiple two-dimensional planar ultrasonic images. Improvements to the conventional tomographic imaging algorithms have been made by utilizing a mode-selective image reconstruction scheme that exploits the specific displacement field, respectively, of the longitudinal wave modes and the shear wave modes, both propagating simultaneously in the test volume. The specific mode structure is exploited by an adaptive weight assignment to the ultrasonic tomographic array. Such adaptive weighting forces the imaging array to look at a specific scan direction and better focus the imaging onto the actual flaw (ultrasound reflector). This preliminary study shows that the usages of the adaptive weights based on wave structure improves image dynamic range and spatial resolution, when compared to a conventional ultrasonic imaging technique such as Delay-And-Sum (DAS). Results will be shown both from numerical models and experimental tests of internal flaws in rails.
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Henning, Bernd, Jens Rautenberg, Andreas Schroeder et Carsten Unverzagt. « A2.1 - Ultrasonic Sensors for Process Applications ». Dans SENSOR+TEST Conferences 2009. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2009. http://dx.doi.org/10.5162/sensor09/v1/a2.1.

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Szolga, Lorant Andras. « Ultrasonic Scanning System for Cartography Applications ». Dans 2022 9th International Conference on Electrical and Electronics Engineering (ICEEE). IEEE, 2022. http://dx.doi.org/10.1109/iceee55327.2022.9772534.

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Caltabiano, Daniele, Stefano Mariani, Giorgio Casiraghi et Andrea Picco. « Piezoelectric Ultrasonic Micromotor ». Dans Micromachines 2021 — 1st International Conference on Micromachines and Applications (ICMA2021). Basel, Switzerland : MDPI, 2021. http://dx.doi.org/10.3390/micromachines2021-09560.

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Chivers, Robert C., D. R. Bacon et J. N. Som. « Toward ultrasonic transducer interferometry in water ». Dans Acousto-Optics and Applications, sous la direction de Antoni Sliwinski, Piotr Kwiek, B. Linde et A. Markiewicz. SPIE, 1992. http://dx.doi.org/10.1117/12.131911.

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Rapports d'organisations sur le sujet "ULTRASONIC APPLICATIONS"

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Terrence A. Grimley. ULTRASONIC METER TESTING FOR STORAGE APPLICATIONS. Office of Scientific and Technical Information (OSTI), décembre 1998. http://dx.doi.org/10.2172/766361.

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Spanner, J., S. Doctor, T. Taylor et J. Muscara. Qualification process for ultrasonic testing in nuclear inservice inspection applications. Office of Scientific and Technical Information (OSTI), mars 1990. http://dx.doi.org/10.2172/7228750.

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Grant. PR-015-15605-R01 In-Situ Proving Techniques for Gas Ultrasonic Meters. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), mai 2016. http://dx.doi.org/10.55274/r0010863.

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The objective of this research was to identify existing technology and conceptualize potential techniques to prove or validate gas ultrasonic meters in-situ using in-body or in meter run methods. The concepts were generated with literature reviews, interviews with industry experts, and brainstorming with experts in several professional interests. In addition to the tools used in flow measurement, tools and concepts from fields such as medicine and micro technology were also considered. An evaluation methodology specifically pertaining to natural gas applications and meter runs with ultrasonic meters was developed with input from the PRCI project team. Using the methodology, a total of thirteen potential ultrasonic meter proving and verification techniques were evaluated. Each concept was described in detail and ranked in order of estimated feasibility for application in industrial natural gas applications.
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Cummings, Ian. Steady-State Ultrasonic Non-Destructive Evaluation for Aerospace & ; Additive Manufacturing Applications. Office of Scientific and Technical Information (OSTI), avril 2021. http://dx.doi.org/10.2172/1774396.

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Hawley et Grimley. PR-015-08611-R01 Development of Clamp-On Ultrasonic Meter Installation Guidelines. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), juillet 2012. http://dx.doi.org/10.55274/r0010774.

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Clamp-on ultrasonic meters remain of interest to the natural gas measurement community because of their potential to provide reasonable measurement accuracy without the need for piping modifications or service interruptions. The applications where clamp-on meters have been successfully applied include temporary measurement while a primary device is unavailable and diagnosing abnormal flow behaviors. The objective of this project was to examine existing public literature concerning the operation and application of clamp-on ultrasonic meters and to use this information to create a guideline document for these meters. As part of the process of establishing the guidelines document, the most significant areas where experimental results are lacking were to be identified. A total of only 20 documents in the public domain were discovered concerning clamp-on ultrasonic meters. These documents were summarized and the important conclusions were drawn from the documents and used to help create a draft guidelines document for the use of clamp-on ultrasonic meters in gas applications. The guidelines provide an overview of different geometric, operational, and installation effects that can affect the operation of clamp-on ultrasonic meters. A number of areas without substantial experimental results were identified and testing was recommended to systematically establish the performance envelope for one size of clamp-on ultrasonic meters. The suggested testing was intended as a first step in reducing the gaps in meter performance data.
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Grimley, Terry. PR-015-20606-R01 Practical Effects of Rough-Walled pipe in Gas Metering Applications. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), janvier 2021. http://dx.doi.org/10.55274/r0012016.

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The influence of upstream pipe roughness on the performance of multipath ultrasonic flow meters was examined through a set of experiments involving three different brands of ultrasonic flow meters. Tests were conducted with 16-inch meters with piping, having a wide variation in surface roughness values with and without a flow conditioner. These results, when combined with the earlier testing of 8-inch diameter meters, can be used to support changes in the practices currently recommended by industry standards.
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Field, M. Development of ultrasonic thermometry for high-temperature high-resolution temperature profiling applications in LMFBR safety research. Office of Scientific and Technical Information (OSTI), mai 1986. http://dx.doi.org/10.2172/5593010.

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Hawley, Adam, Luis Gutierrez et Matthew Godush. PR-015-20605-R01 Clamp-On Ultrasonic Meters for Oil and Gas Flow Meter Verification. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), mars 2022. http://dx.doi.org/10.55274/r0012214.

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This project provided an updated literature review and market review for clamp-on ultrasonic flow meters for oil and gas applications. In addition, this project included updating a guidelines document that was previously developed by PRCI for clamp-on ultrasonic meters. Finally, a survey was conducted with two PRCI technical committees and the results were used to identify three topic areas for future research.
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Grimley, Terry. PR-015-19603-R01 Practical Effects of Rough-Walled Pipe in Gas Metering Applications. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), août 2020. http://dx.doi.org/10.55274/r0011742.

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The influence of upstream pipe roughness on the performance of multipath ultrasonic flow meters was examined through a cursory literature review and an examination of experimental test data supplied by the natural gas industry. The results of these efforts were used to develop a recommendation for additional testing whereby the results of that testing can be combined with these results and potentially be used to support changes in the practices recommended by current industry standards.
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Li, Baisong, et Bo Xu. PR-469-19604-Z01 Auto Diagnostic Method Development for Ultrasonic Flow Meter. Chantilly, Virginia : Pipeline Research Council International, Inc. (PRCI), février 2022. http://dx.doi.org/10.55274/r0012204.

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The objectives of this research are to develop methods for performing ultrasonic flow meter (USM) diagnostic evaluation automatically and a software tool with all necessary attachments. USM-based diagnostics have been established and thirteen categories of knowledge rules of existing cases have been learned and integrated. A search engine for relevant standards, specifications, and other documents of the measurement system has been developed, which enables the free search of text content. Further, with the assistance of modern reasoning techniques, the authorized user only needs to configure an EXCEL file or scripts to activate the rules of the knowledge base by using Drools technology. Therefore, the integration of any potential knowledge rules is convenient and requires no professional skills or changing of the internal source code of the software. Secondly, a new flow meter diagnostic method is proposed based on multiple information methodologies and it is based on the real-time measurement data, operation data, and video data if applicable. The method is intended to identify abnormal states of the measurement system on a real-time basis with the assistance of the knowledge rules and to provide a strategy for mitigating the meter error of components within the measurement system. Thirdly, the applications of Gaussian quadrature diagnostics in daily acquisition nomination change situations and compressor-induced pulsating flow scenarios have been investigated and results are shown in the document. Based on the results, it can be concluded that the measurement uncertainty caused by compressor-induced pulsating flows is obvious, while the measurement uncertainty caused by daily acquisition nomination change is relatively smaller. The software is then developed based on the knowledge, the idea of multiple information methods, and applications of the Gaussian quadrature diagnostics method with all necessary attachments. The architecture, the algorithm, and a few examples are introduced.
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