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device</title> <meta name="description" content="Search results for: ultrasonic device"> <meta name="keywords" content="ultrasonic device"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="ultrasonic device"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 2270</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: ultrasonic device</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2270</span> Blood Clot Emulsification via Ultrasonic Thrombolysis Device</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sun%20Tao">Sun Tao</a>, <a href="https://publications.waset.org/abstracts/search?q=Lou%20Liang"> Lou Liang</a>, <a href="https://publications.waset.org/abstracts/search?q=Tan%20Xing%20Haw%20Marvin">Tan Xing Haw Marvin</a>, <a href="https://publications.waset.org/abstracts/search?q=Gu%20Yuandong%20Alex"> Gu Yuandong Alex</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Patients with blood clots in their brains can experience problems with their vision or speech, seizures and general weakness. To treat blood clots, clinicians presently have two options. The first involves drug therapy to thin the blood and thus reduce the clot. The second choice is to invasively remove the clot using a plastic tube called a catheter. Both approaches carry a high risk of bleeding, and invasive procedures, such as catheter intervention, can also damage the blood vessel wall and cause infection. Ultrasonic treatment as a potential alternative therapy to break down clots is attracting growing interests due to the reduced adverse effects. To demonstrate the concept, in this investigation a microfabricated ultrasonic device was electrically packaged with printed circuit board to treat healthy human blood. The red blood cells could be broken down after 3-hour ultrasonic treatment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=microfabrication" title="microfabrication">microfabrication</a>, <a href="https://publications.waset.org/abstracts/search?q=blood%20clot" title=" blood clot"> blood clot</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20thrombolysis%20device" title=" ultrasonic thrombolysis device"> ultrasonic thrombolysis device</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20device" title=" ultrasonic device"> ultrasonic device</a> </p> <a href="https://publications.waset.org/abstracts/35989/blood-clot-emulsification-via-ultrasonic-thrombolysis-device" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35989.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">450</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2269</span> Effect of Vibration Amplitude and Welding Force on Weld Strength of Ultrasonic Metal Welding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ziad.%20Sh.%20Al%20Sarraf">Ziad. Sh. Al Sarraf</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ultrasonic metal welding has been the subject of ongoing research and development, most recently concentrating on metal joining in miniature devices, for example to allow solder-free wire bonding. As well as at the small scale, there are also opportunities to research the joining of thicker sheet metals and to widen the range of similar and dissimilar materials that can be successfully joined using this technology. This study presents the design, characterisation and test of a lateral-drive ultrasonic metal spot welding device. The ultrasonic metal spot welding horn is modelled using finite element analysis (FEA) and its vibration behaviour is characterised experimentally to ensure ultrasonic energy is delivered effectively to the weld coupon. The welding stack and fixtures are then designed and mounted on a test machine to allow a series of experiments to be conducted for various welding and ultrasonic parameters. Weld strength is subsequently analysed using tensile-shear tests. The results show how the weld strength is particularly sensitive to the combination of clamping force and ultrasonic vibration amplitude of the welding tip, but there are optimal combinations of these and also limits that must be clearly identified. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20welding" title="ultrasonic welding">ultrasonic welding</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration%20amplitude" title=" vibration amplitude"> vibration amplitude</a>, <a href="https://publications.waset.org/abstracts/search?q=welding%20force" title=" welding force"> welding force</a>, <a href="https://publications.waset.org/abstracts/search?q=weld%20strength" title=" weld strength"> weld strength</a> </p> <a href="https://publications.waset.org/abstracts/41161/effect-of-vibration-amplitude-and-welding-force-on-weld-strength-of-ultrasonic-metal-welding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41161.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">368</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2268</span> Autonomous Control of Ultrasonic Transducer Drive System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dong-Keun%20Jeong">Dong-Keun Jeong</a>, <a href="https://publications.waset.org/abstracts/search?q=Jong-Hyun%20Kim"> Jong-Hyun Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Woon-Ha%20Yoon"> Woon-Ha Yoon</a>, <a href="https://publications.waset.org/abstracts/search?q=Hee-Je%20Kim"> Hee-Je Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In order to automatically operate the ultrasonic transducer drive system for sonicating aluminum, this paper proposes the ultrasonic transducer sensorless control algorithm. The resonance frequency shift and electrical impedance change is a common phenomenon in the state of the ultrasonic transducer. The proposed control algorithm make use of the impedance change of ultrasonic transducer according to the environment between air state and aluminum alloy state, it controls the ultrasonic transducer drive system autonomous without a sensor. The proposed sensorless autonomous ultrasonic transducer control algorithm was experimentally verified using a 3kW prototype ultrasonic transducer drive system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20transducer%20drive%20system" title="ultrasonic transducer drive system">ultrasonic transducer drive system</a>, <a href="https://publications.waset.org/abstracts/search?q=impedance%20change" title=" impedance change"> impedance change</a>, <a href="https://publications.waset.org/abstracts/search?q=sensorless" title=" sensorless"> sensorless</a>, <a href="https://publications.waset.org/abstracts/search?q=autonomous%20control%20algorithm" title=" autonomous control algorithm"> autonomous control algorithm</a> </p> <a href="https://publications.waset.org/abstracts/63698/autonomous-control-of-ultrasonic-transducer-drive-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63698.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">360</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2267</span> Non-Destructive Testing of Metal Pipes with Ultrasonic Sensors Based on Determination of Maximum Ultrasonic Frequency</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Herlina%20Abdul%20Rahim">Herlina Abdul Rahim</a>, <a href="https://publications.waset.org/abstracts/search?q=Javad%20Abbaszadeh"> Javad Abbaszadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Ruzairi%20Abdul%20Rahim"> Ruzairi Abdul Rahim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this research, the non-invasive ultrasonic transmission tomography is investigated. In order to model the ultrasonic wave scattering for different thickness of metal pipes, two-dimensional (2D) finite element modeling (FEM) has been utilized. The wall thickness variation of the metal pipe and its influence on propagation of the ultrasonic pressure wave are explored in this paper, includes frequency analysing in order to find the maximum applicable frequency. The simulation results have been compared to experimental data and are shown to provide key insight for this well-defined experimental case by explaining the achieved reconstructed images from experimental setup. Finally, the experimental results which are useful for further investigation for the application of ultrasonic transmission tomography in industry are illustrated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20transmission%20tomography" title="ultrasonic transmission tomography">ultrasonic transmission tomography</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20sensors" title=" ultrasonic sensors"> ultrasonic sensors</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20wave" title=" ultrasonic wave"> ultrasonic wave</a>, <a href="https://publications.waset.org/abstracts/search?q=non-invasive%20tomography" title=" non-invasive tomography"> non-invasive tomography</a>, <a href="https://publications.waset.org/abstracts/search?q=metal%20pipe" title=" metal pipe"> metal pipe</a> </p> <a href="https://publications.waset.org/abstracts/50272/non-destructive-testing-of-metal-pipes-with-ultrasonic-sensors-based-on-determination-of-maximum-ultrasonic-frequency" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50272.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">359</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2266</span> Non-Destructive Inspection for Tunnel Lining Concrete with Small Void by Using Ultrasonic</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yasuyuki%20Nabeshima">Yasuyuki Nabeshima</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many tunnels which have been constructed since more than 50 years were existing in Japan. Lining concrete in these tunnels have many problems such as crack, flacking and void. Inner void between lining concrete and rock was very hard to find by outside visual check and hammering test. In this paper, non-destructive inspection by using ultrasonic was applied to investigate inner void. A model concrete with inner void was used as specimen and ultrasonic inspection was applied to specify the location and the size of void. As a result, ultrasonic inspection could accurately find the inner void. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tunnel" title="tunnel">tunnel</a>, <a href="https://publications.waset.org/abstracts/search?q=lining%20concrete" title=" lining concrete"> lining concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=void" title=" void"> void</a>, <a href="https://publications.waset.org/abstracts/search?q=non-destructive%20inspection" title=" non-destructive inspection"> non-destructive inspection</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic" title=" ultrasonic"> ultrasonic</a> </p> <a href="https://publications.waset.org/abstracts/74615/non-destructive-inspection-for-tunnel-lining-concrete-with-small-void-by-using-ultrasonic" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74615.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">213</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2265</span> Design of a Pulse Generator Based on a Programmable System-on-Chip (PSoC) for Ultrasonic Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pedro%20Acevedo">Pedro Acevedo</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20D%C3%ADaz"> Carlos Díaz</a>, <a href="https://publications.waset.org/abstracts/search?q=M%C3%B3nica%20V%C3%A1zquez"> Mónica Vázquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Joel%20Dur%C3%A1n"> Joel Durán</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper describes the design of a pulse generator based on the Programmable System-on-Chip (PSoC) module. In this module, using programmable logic is possible to implement different pulses which are required for ultrasonic applications, either in a single channel or multiple channels. This module can operate with programmable frequencies from 3-74 MHz; its programming may be versatile covering a wide range of ultrasonic applications. It is ideal for low-power ultrasonic applications where PZT or PVDF transducers are used. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PSoC" title="PSoC">PSoC</a>, <a href="https://publications.waset.org/abstracts/search?q=pulse%20generator" title=" pulse generator"> pulse generator</a>, <a href="https://publications.waset.org/abstracts/search?q=PVDF" title=" PVDF"> PVDF</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20transducer" title=" ultrasonic transducer"> ultrasonic transducer</a> </p> <a href="https://publications.waset.org/abstracts/41457/design-of-a-pulse-generator-based-on-a-programmable-system-on-chip-psoc-for-ultrasonic-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41457.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">293</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2264</span> Effect of Ultrasonic Treatment on the Suspension Stability, Zeta Potential and Contact Angle of Celestite</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kiraz%20Esmeli">Kiraz Esmeli</a>, <a href="https://publications.waset.org/abstracts/search?q=Alper%20Ozkan"> Alper Ozkan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, firstly, the effect of ultrasonic treatment on the stability of celestite suspension was investigated. In this context, the variations of the suspension stability with ultrasonic power, treatment time, immersion depth of ultrasonic probe, and treatment regime (batch and continuous) were determined. The experimental results showed that the suspension stability and zeta potential of celestite decreased with ultrasonic treatment. Also, the treatment time, immersion depth of probe, and treatment regime affected the stability of celestite suspension. Secondly, the effect of pre-treatment of the suspension with the ultrasonic process on the shear flocculation of celestite using sodium dodecyl sulfate (SDS) was studied and the variations of the flocculation, zeta potential, and contact angle of the mineral with SDS concentration were presented. It was found that the ultrasonic pre-treatment slightly improved the shear flocculation of celestite particles in accordance with the increase in the contact angles. In addition, the ultrasonic process again relatively reduced the magnitude of the negative potential of celestite particles in the presence of SDS. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=celestite" title="celestite">celestite</a>, <a href="https://publications.waset.org/abstracts/search?q=contact%20angle" title=" contact angle"> contact angle</a>, <a href="https://publications.waset.org/abstracts/search?q=suspension%20stability" title=" suspension stability"> suspension stability</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20treatment" title=" ultrasonic treatment"> ultrasonic treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=zeta%20potential" title=" zeta potential"> zeta potential</a> </p> <a href="https://publications.waset.org/abstracts/89475/effect-of-ultrasonic-treatment-on-the-suspension-stability-zeta-potential-and-contact-angle-of-celestite" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89475.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">226</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2263</span> Algae Growth and Biofilm Control by Ultrasonic Technology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vojtech%20Stejskal">Vojtech Stejskal</a>, <a href="https://publications.waset.org/abstracts/search?q=Hana%20Skalova"> Hana Skalova</a>, <a href="https://publications.waset.org/abstracts/search?q=Petr%20Kvapil"> Petr Kvapil</a>, <a href="https://publications.waset.org/abstracts/search?q=George%20Hutchinson"> George Hutchinson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Algae growth has been an important issue in water management of water plants, ponds and lakes, swimming pools, aquaculture & fish farms, gardens or golf courses for last decades. There are solutions based on chemical or biological principles. Apart of these traditional principles for inhibition of algae growth and biofilm production there are also physical methods which are very competitive compared to the traditional ones. Ultrasonic technology is one of these alternatives. Ultrasonic emitter is able to eliminate the biofilm which behaves as a host and attachment point for algae and is original reason for the algae growth. The ultrasound waves prevent majority of the bacteria in planktonic form becoming strongly attached sessile bacteria that creates welcoming layer for the biofilm production. Biofilm creation is very fast – in the serene water it takes between 30 minutes to 4 hours, depending on temperature and other parameters. Ultrasound device is not killing bacteria. Ultrasound waves are passing through bacteria, which retract as if they were in very turbulent water even though the water is visually completely serene. In these conditions, bacteria does not excrete the polysaccharide glue they use to attach to the surface of the pool or pond, where ultrasonic technology is used. Ultrasonic waves decrease the production of biofilm on the surfaces in the selected area. In case there are already at the start of the application of ultrasonic technology in a pond or basin clean inner surfaces, the biofilm production is almost absolutely inhibited. This paper talks about two different pilot applications – one in Czech Republic and second in United States of America, where the used ultrasonic technology (AlgaeControl) is coming from. On both sites, there was used Mezzo Ultrasonic Algae Control System with very positive results not only on biofilm production, but also algae growth in the surrounding area. Technology has been successfully tested in two different environments. The poster describes the differences and their influence on the efficiency of ultrasonic technology application. Conclusions and lessons learned can be possibly applied also on other sites within Europe or even further. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=algae%20growth" title="algae growth">algae growth</a>, <a href="https://publications.waset.org/abstracts/search?q=biofilm%20production" title=" biofilm production"> biofilm production</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20solution" title=" ultrasonic solution"> ultrasonic solution</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a> </p> <a href="https://publications.waset.org/abstracts/87487/algae-growth-and-biofilm-control-by-ultrasonic-technology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87487.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">269</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2262</span> Calcium Silicate Bricks – Ultrasonic Pulse Method: Effects of Natural Frequency of Transducers on Measurement Results</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jiri%20Brozovsky">Jiri Brozovsky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Modulus of elasticity is one of the important parameters of construction materials, which considerably influence their deformation properties and which can also be determined by means of non-destructive test methods like ultrasonic pulse method. However, measurement results of ultrasonic pulse methods are influenced by various factors, one of which is the natural frequency of the transducers. The paper states knowledge about influence of natural frequency of the transducers (54; 82 and 150kHz) on ultrasonic pulse velocity and dynamic modulus of elasticity (Young's Dynamic modulus of elasticity). Differences between ultrasonic pulse velocity and dynamic modulus of elasticity were found with the same smallest dimension of test specimen in the direction of sounding and density their value decreases as the natural frequency of transducers grew. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=calcium%20silicate%20brick" title="calcium silicate brick">calcium silicate brick</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20pulse%20method" title=" ultrasonic pulse method"> ultrasonic pulse method</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20pulse%20velocity" title=" ultrasonic pulse velocity"> ultrasonic pulse velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20modulus%20of%20elasticity" title=" dynamic modulus of elasticity"> dynamic modulus of elasticity</a> </p> <a href="https://publications.waset.org/abstracts/12508/calcium-silicate-bricks-ultrasonic-pulse-method-effects-of-natural-frequency-of-transducers-on-measurement-results" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12508.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">416</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2261</span> Characterization of Ultrasonic Nonlinearity in Concrete under Cyclic Change of Prestressing Force</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gyu-Jin%20Kim">Gyu-Jin Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyo-Gyoung%20Kwak"> Hyo-Gyoung Kwak</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this research, the effect of prestressing force on the nonlinearity of concrete was investigated by an experimental study. For the measurement of ultrasonic nonlinearity, a prestressed concrete beam was prepared and a nonlinear resonant ultrasound method was adopted. When the prestressing force changes, the stress state of the concrete inside the beam is affected, which leads to the occurrence of micro-cracks and changes in mechanical properties. Therefore, it is necessary to introduce nonlinear ultrasonic technology which sensitively reflects microstructural changes. Repetitive prestressing load history, including maximum levels of 45%, 60% and 75%, depending on the compressive strength, is designed to evaluate the impact of loading levels on the nonlinearity. With the experimental results, the possibility of ultrasonic nonlinearity as a trial indicator of stress was evaluated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=micro%20crack" title="micro crack">micro crack</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20ultrasonic%20resonant%20spectroscopy" title=" nonlinear ultrasonic resonant spectroscopy"> nonlinear ultrasonic resonant spectroscopy</a>, <a href="https://publications.waset.org/abstracts/search?q=prestressed%20concrete%20beam" title=" prestressed concrete beam"> prestressed concrete beam</a>, <a href="https://publications.waset.org/abstracts/search?q=prestressing%20force" title=" prestressing force"> prestressing force</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20nonlinearity" title=" ultrasonic nonlinearity"> ultrasonic nonlinearity</a> </p> <a href="https://publications.waset.org/abstracts/75772/characterization-of-ultrasonic-nonlinearity-in-concrete-under-cyclic-change-of-prestressing-force" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75772.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">240</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2260</span> Thickness Measurement and Void Detection in Concrete Elements through Ultrasonic Pulse</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Leonel%20Lipa%20Cusi">Leonel Lipa Cusi</a>, <a href="https://publications.waset.org/abstracts/search?q=Enrique%20Nestor%20Pasquel%20Carbajal"> Enrique Nestor Pasquel Carbajal</a>, <a href="https://publications.waset.org/abstracts/search?q=Laura%20Marina%20Navarro%20Alvarado"> Laura Marina Navarro Alvarado</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20Del%20%C3%81lamo%20Carazas"> José Del Álamo Carazas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research analyses the accuracy of the ultrasound and the pulse echo ultrasound technic to find voids and to measure thickness of concrete elements. These mentioned air voids are simulated by polystyrene expanded and hollow containers of thin thickness made of plastic or cardboard of different sizes and shapes. These targets are distributed strategically inside concrete at different depths. For this research, a shear wave pulse echo ultrasonic device of 50 KHz is used to scan the concrete elements. Despite the small measurements of the concrete elements and because of voids’ size are near the half of the wavelength, pre and post processing steps like voltage, gain, SAFT, envelope and time compensation were made in order to improve imaging results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ultrasonic" title="ultrasonic">ultrasonic</a>, <a href="https://publications.waset.org/abstracts/search?q=concrete" title=" concrete"> concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=thickness" title=" thickness"> thickness</a>, <a href="https://publications.waset.org/abstracts/search?q=pulse%20echo" title=" pulse echo"> pulse echo</a>, <a href="https://publications.waset.org/abstracts/search?q=void" title=" void"> void</a> </p> <a href="https://publications.waset.org/abstracts/68618/thickness-measurement-and-void-detection-in-concrete-elements-through-ultrasonic-pulse" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68618.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">331</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2259</span> Application of Response Surface Methodology to Optimize the Thermal Conductivity Enhancement of a Hybrid Nanofluid</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aminreza%20Noghrehabadi">Aminreza Noghrehabadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Behbahani"> Mohammad Behbahani</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Pourabbasi"> Ali Pourabbasi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this experimental work, unlike conventional methods that mix two nanoparticles together, silver nanoparticles have been synthesized on the surface of graphene. In this research, the effect of adding modified graphene nanocomposite-silver nanoparticles to the base fluid (distilled water) was studied. Different transmission electron microscopy (TEM) and field emission scanning electron microscope (FESEM) techniques have been used to examine the surfaces and atomic structure of nanoparticles. An ultrasonic device has been used to disperse the nanocomposite in distilled water. Also, the thermal conductivity coefficient was measured by the transient hot wire method using the KD2-pro device. In addition, the thermal conductivity coefficient was measured in the temperature range of 30°C to 50°C, concentration of 10 ppm to 1000 ppm, and ultrasonic time of 2 minutes to 15 minutes. The results showed that with the increase of all three parameters of temperature, concentration and ultrasonic time, the percentage of increase in thermal conductivity will go up until reaching the optimal point, and after passing the optimal point, the percentage of increase in thermal conductivity will have a downward trend. To calculate the thermal conductivity of this nanofluid, a very accurate experimental equation has been obtained using Design Expert software. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thermal%20conductivity" title="thermal conductivity">thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofluids" title=" nanofluids"> nanofluids</a>, <a href="https://publications.waset.org/abstracts/search?q=enhancement" title=" enhancement"> enhancement</a>, <a href="https://publications.waset.org/abstracts/search?q=silver%20nano%20particle" title=" silver nano particle"> silver nano particle</a>, <a href="https://publications.waset.org/abstracts/search?q=optimal%20point" title=" optimal point"> optimal point</a> </p> <a href="https://publications.waset.org/abstracts/165347/application-of-response-surface-methodology-to-optimize-the-thermal-conductivity-enhancement-of-a-hybrid-nanofluid" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165347.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">89</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2258</span> Effect of Ultrasonic Vibration on the Dilution, Mechanical, and Metallurgical Properties in Cladding of 308 on Mild Steel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sandeep%20Singh%20Sandhu">Sandeep Singh Sandhu</a>, <a href="https://publications.waset.org/abstracts/search?q=Karanvir%20Singh%20Ghuman"> Karanvir Singh Ghuman</a>, <a href="https://publications.waset.org/abstracts/search?q=Parminder%20Singh%20Saini">Parminder Singh Saini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the present investigation was to study the effect of ultrasonic vibration on the cladding of the AISI 308 on the mild steel plates using the shielded metal arc welding (SMAW). Ultrasonic vibrations were applied to molten austenitic stainless steel during the welding process. Due to acoustically induced cavitations and streaming there is a complete mixture of the clad metal and the base metal. It was revealed that cladding of AISI 308 over mild steel along with ultrasonic vibrations result in uniform and finer grain structures. The effect of the vibration on the dilution, mechanical properties and metallographic studies were also studied. It was found that the welding done using the ultrasonic vibration has the less dilution and CVN value for the vibrated sample was also high. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=surfacing" title="surfacing">surfacing</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20vibrations" title=" ultrasonic vibrations"> ultrasonic vibrations</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=shielded%20metal%20arc%20welding" title=" shielded metal arc welding"> shielded metal arc welding</a> </p> <a href="https://publications.waset.org/abstracts/33132/effect-of-ultrasonic-vibration-on-the-dilution-mechanical-and-metallurgical-properties-in-cladding-of-308-on-mild-steel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33132.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">494</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2257</span> Research of Acoustic Propagation within Marine Riser in Deepwater Drilling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Xiaohui%20Wang">Xiaohui Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhichuan%20Guan"> Zhichuan Guan</a>, <a href="https://publications.waset.org/abstracts/search?q=Roman%20Shor"> Roman Shor</a>, <a href="https://publications.waset.org/abstracts/search?q=Chuanbin%20Xu"> Chuanbin Xu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Early monitoring and real-time quantitative description of gas intrusion under the premise of ensuring the integrity of the drilling fluid circulation system will greatly improve the accuracy and effectiveness of deepwater gas-kick monitoring. Therefore, in order to study the propagation characteristics of ultrasonic waves in the gas-liquid two-phase flow within the marine riser, in this paper, a numerical simulation method of ultrasonic propagation in the annulus of the riser was established, and the credibility of the numerical analysis was verified by the experimental results of the established gas intrusion monitoring simulation experimental device. The numerical simulation can solve the sound field in the gas-liquid two-phase flow according to different physical models, and it is easier to realize the single factor control. The influence of each parameter on the received signal can be quantitatively investigated, and the law with practical guiding significance can be obtained. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gas-kick%20detection" title="gas-kick detection">gas-kick detection</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic" title=" ultrasonic"> ultrasonic</a>, <a href="https://publications.waset.org/abstracts/search?q=void%20fraction" title=" void fraction"> void fraction</a>, <a href="https://publications.waset.org/abstracts/search?q=coda%20wave%20velocity" title=" coda wave velocity"> coda wave velocity</a> </p> <a href="https://publications.waset.org/abstracts/103466/research-of-acoustic-propagation-within-marine-riser-in-deepwater-drilling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/103466.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">157</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2256</span> Compressive Strength Evaluation of Underwater Concrete Structures Integrating the Combination of Rebound Hardness and Ultrasonic Pulse Velocity Methods with Artificial Neural Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Seunghee%20Park">Seunghee Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Junkyeong%20Kim"> Junkyeong Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Eun-Seok%20Shin"> Eun-Seok Shin</a>, <a href="https://publications.waset.org/abstracts/search?q=Sang-Hun%20Han"> Sang-Hun Han</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, two kinds of nondestructive evaluation (NDE) techniques (rebound hardness and ultrasonic pulse velocity methods) are investigated for the effective maintenance of underwater concrete structures. A new methodology to estimate the underwater concrete strengths more effectively, named “artificial neural network (ANN) – based concrete strength estimation with the combination of rebound hardness and ultrasonic pulse velocity methods” is proposed and verified throughout a series of experimental works. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=underwater%20concrete" title="underwater concrete">underwater concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=rebound%20hardness" title=" rebound hardness"> rebound hardness</a>, <a href="https://publications.waset.org/abstracts/search?q=Schmidt%20hammer" title=" Schmidt hammer"> Schmidt hammer</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20pulse%20velocity" title=" ultrasonic pulse velocity"> ultrasonic pulse velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20sensor" title=" ultrasonic sensor"> ultrasonic sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=artificial%20neural%20networks" title=" artificial neural networks"> artificial neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=ANN" title=" ANN"> ANN</a> </p> <a href="https://publications.waset.org/abstracts/2714/compressive-strength-evaluation-of-underwater-concrete-structures-integrating-the-combination-of-rebound-hardness-and-ultrasonic-pulse-velocity-methods-with-artificial-neural-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2714.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">532</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2255</span> Evaluation of Ultrasonic Techniques for the Estimation of Air Voids in Asphalt Concrete</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Majid%20Zargar">Majid Zargar</a>, <a href="https://publications.waset.org/abstracts/search?q=Frank%20Bullen"> Frank Bullen</a>, <a href="https://publications.waset.org/abstracts/search?q=Ron%20Ayers"> Ron Ayers</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the important factors in the design of asphalt concrete mixes is the accurate measurement of air voids and their variable distribution. Both can have significant impact on long and short term fatigue and creep behaviour under traffic. While some simple methods exist for overall evaluation of air voids, measuring air void distribution in asphalt concrete is very complex, involving expensive techniques such as X-ray methodologies. The research reported in the paper investigated the use of non-destructive ultrasonic techniques as an alternative to estimate the amount of air voids and their distribution within asphalt samples. Seventy-four Standard AC–14 asphalt samples made with three types of bitumen; Multigrade, PMB and C320 were analysed using ultrasonic techniques. The results have illustrated that ultrasonic testing has the potential of being a rapid, accurate and cost-effective method of estimating air void distribution in asphalt. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=asphalt%20concrete" title="asphalt concrete">asphalt concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=air%20voids" title=" air voids"> air voids</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic" title=" ultrasonic"> ultrasonic</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20behaviour" title=" mechanical behaviour"> mechanical behaviour</a> </p> <a href="https://publications.waset.org/abstracts/59847/evaluation-of-ultrasonic-techniques-for-the-estimation-of-air-voids-in-asphalt-concrete" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59847.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">346</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2254</span> Ultrasonic Densitometry of Bone Tissue of Jaws and Phalanges of Fingers in Patients after Orthodontic Treatment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Margarita%20Belousova">Margarita Belousova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The ultrasonic densitometry (RU patent № 2541038) was used to assess the density of the bone tissue in the jaws of patients after orthodontic treatment. In addition, by ultrasonic densitometry assessed the state of the bone tissue in the region III phalanges of middle fingers in above mentioned patients. A comparative study was carried out in healthy volunteers of same age. It was established a significant decrease of the ultrasound wave speed and bone mineral density after active period of orthodontic treatment. Statistically, significant differences in bone mineral density of the fingers by ultrasonic densitometry in both groups of patients were not detected. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=intraoral%20ultrasonic%20densitometry" title="intraoral ultrasonic densitometry">intraoral ultrasonic densitometry</a>, <a href="https://publications.waset.org/abstracts/search?q=bone%20tissue%20density%20of%20jaws" title=" bone tissue density of jaws"> bone tissue density of jaws</a>, <a href="https://publications.waset.org/abstracts/search?q=bone%20tissue%20density%20of%20phalanges%20of%20fingers" title=" bone tissue density of phalanges of fingers"> bone tissue density of phalanges of fingers</a>, <a href="https://publications.waset.org/abstracts/search?q=orthodontic%20treatment" title=" orthodontic treatment"> orthodontic treatment</a> </p> <a href="https://publications.waset.org/abstracts/54572/ultrasonic-densitometry-of-bone-tissue-of-jaws-and-phalanges-of-fingers-in-patients-after-orthodontic-treatment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54572.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">276</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2253</span> Vibration Analysis and Optimization Design of Ultrasonic Horn</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kuen%20Ming%20Shu">Kuen Ming Shu</a>, <a href="https://publications.waset.org/abstracts/search?q=Ren%20Kai%20Ho"> Ren Kai Ho</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ultrasonic horn has the functions of amplifying amplitude and reducing resonant impedance in ultrasonic system. Its primary function is to amplify deformation or velocity during vibration and focus ultrasonic energy on the small area. It is a crucial component in design of ultrasonic vibration system. There are five common design methods for ultrasonic horns: analytical method, equivalent circuit method, equal mechanical impedance, transfer matrix method, finite element method. In addition, the general optimization design process is to change the geometric parameters to improve a single performance. Therefore, in the general optimization design process, we couldn't find the relation of parameter and objective. However, a good optimization design must be able to establish the relationship between input parameters and output parameters so that the designer can choose between parameters according to different performance objectives and obtain the results of the optimization design. In this study, an ultrasonic horn provided by Maxwide Ultrasonic co., Ltd. was used as the contrast of optimized ultrasonic horn. The ANSYS finite element analysis (FEA) software was used to simulate the distribution of the horn amplitudes and the natural frequency value. The results showed that the frequency for the simulation values and actual measurement values were similar, verifying the accuracy of the simulation values. The ANSYS DesignXplorer was used to perform Response Surface optimization, which could shows the relation of parameter and objective. Therefore, this method can be used to substitute the traditional experience method or the trial-and-error method for design to reduce material costs and design cycles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=horn" title="horn">horn</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20frequency" title=" natural frequency"> natural frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=response%20surface%20optimization" title=" response surface optimization"> response surface optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20vibration" title=" ultrasonic vibration"> ultrasonic vibration</a> </p> <a href="https://publications.waset.org/abstracts/151835/vibration-analysis-and-optimization-design-of-ultrasonic-horn" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151835.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">117</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2252</span> Finite Element Modelling for the Development of a Planar Ultrasonic Dental Scaler for Prophylactic and Periodontal Care</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Martin%20Hofmann">Martin Hofmann</a>, <a href="https://publications.waset.org/abstracts/search?q=Diego%20Stutzer"> Diego Stutzer</a>, <a href="https://publications.waset.org/abstracts/search?q=Thomas%20Niederhauser"> Thomas Niederhauser</a>, <a href="https://publications.waset.org/abstracts/search?q=Juergen%20Burger"> Juergen Burger</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dental biofilm is the main etiologic factor for caries, periodontal and peri-implant infections. In addition to the risk of tooth loss, periodontitis is also associated with an increased risk of systemic diseases such as atherosclerotic cardiovascular disease and diabetes. For this reason, dental hygienists use ultrasonic scalers for prophylactic and periodontal care of the teeth. However, the current instruments are limited to their dimensions and operating frequencies. The innovative design of a planar ultrasonic transducer introduces a new type of dental scalers. The flat titanium-based design allows the mass to be significantly reduced compared to a conventional screw-mounted Langevin transducer, resulting in a more efficient and controllable scaler. For the development of the novel device, multi-physics finite element analysis was used to simulate and optimise various design concepts. This process was supported by prototyping and electromechanical characterisation. The feasibility and potential of a planar ultrasonic transducer have already been confirmed by our current prototypes, which achieve higher performance compared to commercial devices. Operating at the desired resonance frequency of 28 kHz with a driving voltage of 40 Vrms results in an in-plane tip oscillation with a displacement amplitude of up to 75 μm by having less than 8 % out-of-plane movement and an energy transformation factor of 1.07 μm/mA. In a further step, we will adapt the design to two additional resonance frequencies (20 and 40 kHz) to obtain information about the most suitable mode of operation. In addition to the already integrated characterization methods, we will evaluate the clinical efficiency of the different devices in an in vitro setup with an artificial biofilm pocket model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20instrumentation" title="ultrasonic instrumentation">ultrasonic instrumentation</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20scaling" title=" ultrasonic scaling"> ultrasonic scaling</a>, <a href="https://publications.waset.org/abstracts/search?q=piezoelectric%20transducer" title=" piezoelectric transducer"> piezoelectric transducer</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20simulation" title=" finite element simulation"> finite element simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=dental%20biofilm" title=" dental biofilm"> dental biofilm</a>, <a href="https://publications.waset.org/abstracts/search?q=dental%20calculus" title=" dental calculus"> dental calculus</a> </p> <a href="https://publications.waset.org/abstracts/150148/finite-element-modelling-for-the-development-of-a-planar-ultrasonic-dental-scaler-for-prophylactic-and-periodontal-care" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150148.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">123</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2251</span> Non-Destructing Testing of Sandstones from Unconventional Reservoir in Poland with Use of Ultrasonic Pulse Velocity Technique and X-Ray Computed Microtomography</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Micha%C5%82%20Maksimczuk">Michał Maksimczuk</a>, <a href="https://publications.waset.org/abstracts/search?q=%C5%81ukasz%20Kaczmarek"> Łukasz Kaczmarek</a>, <a href="https://publications.waset.org/abstracts/search?q=Tomasz%20Wejrzanowski"> Tomasz Wejrzanowski</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study concerns high-resolution X-ray computed microtomography (µCT) and ultrasonic pulse analysis of Cambrian sandstones from a borehole located in the Baltic Sea Coast of northern Poland. µCT and ultrasonic technique are non-destructive methods commonly used to determine the internal structure of reservoir rock sample. The spatial resolution of the µCT images obtained was 27 µm, which enabled the author to create accurate 3-D visualizations of structure geometry and to calculate the ratio of pores volume to the total sample volume. A copper X-ray source filter was used to reduce image artifacts. Furthermore, samples Young’s modulus and Poisson ratio were obtained with use of ultrasonic pulse technique. µCT and ultrasonic pulse technique provide complex information which can be used for explorations and characterization of reservoir rocks. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=elastic%20parameters" title="elastic parameters">elastic parameters</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%20absorption%20coefficient" title=" linear absorption coefficient"> linear absorption coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=northern%20Poland" title=" northern Poland"> northern Poland</a>, <a href="https://publications.waset.org/abstracts/search?q=tight%20gas" title=" tight gas"> tight gas</a> </p> <a href="https://publications.waset.org/abstracts/65737/non-destructing-testing-of-sandstones-from-unconventional-reservoir-in-poland-with-use-of-ultrasonic-pulse-velocity-technique-and-x-ray-computed-microtomography" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65737.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">251</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2250</span> An Ultrasonic Signal Processing System for Tomographic Imaging of Reinforced Concrete Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Edwin%20Forero-Garcia">Edwin Forero-Garcia</a>, <a href="https://publications.waset.org/abstracts/search?q=Jaime%20Vitola"> Jaime Vitola</a>, <a href="https://publications.waset.org/abstracts/search?q=Brayan%20Cardenas"> Brayan Cardenas</a>, <a href="https://publications.waset.org/abstracts/search?q=Johan%20Casagua"> Johan Casagua</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research article presents the integration of electronic and computer systems, which developed an ultrasonic signal processing system that performs the capture, adaptation, and analog-digital conversion to later carry out its processing and visualization. The capture and adaptation of the signal were carried out from the design and implementation of an analog electronic system distributed in stages: 1. Coupling of impedances; 2. Analog filter; 3. Signal amplifier. After the signal conditioning was carried out, the ultrasonic information was digitized using a digital microcontroller to carry out its respective processing. The digital processing of the signals was carried out in MATLAB software for the elaboration of A-Scan, B and D-Scan types of ultrasonic images. Then, advanced processing was performed using the SAFT technique to improve the resolution of the Scan-B-type images. Thus, the information from the ultrasonic images was displayed in a user interface developed in .Net with Visual Studio. For the validation of the system, ultrasonic signals were acquired, and in this way, the non-invasive inspection of the structures was carried out and thus able to identify the existing pathologies in them. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acquisition" title="acquisition">acquisition</a>, <a href="https://publications.waset.org/abstracts/search?q=signal%20processing" title=" signal processing"> signal processing</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a>, <a href="https://publications.waset.org/abstracts/search?q=SAFT" title=" SAFT"> SAFT</a>, <a href="https://publications.waset.org/abstracts/search?q=HMI" title=" HMI"> HMI</a> </p> <a href="https://publications.waset.org/abstracts/162674/an-ultrasonic-signal-processing-system-for-tomographic-imaging-of-reinforced-concrete-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162674.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">107</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2249</span> Effect of Inclusions in the Ultrasonic Fatigue Endurance of Maraging 300 Steel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20M.%20Dominguez%20Almaraz">G. M. Dominguez Almaraz</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20A.%20Ruiz%20Vilchez"> J. A. Ruiz Vilchez</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Sanchez%20Miranda"> M. A. Sanchez Miranda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ultrasonic fatigue tests have been carried out in the maraging 300 steel. Experimental results show that fatigue endurance under this modality of testing is closely related to the nature and geometrical properties of inclusions present in this alloy. A model was proposed to correlate the ultrasonic fatigue endurance with the nature and geometrical properties of the crack initiation inclusion. Scanning Electron Microscopy analyses were obtained on the fracture surfaces, in order to assess the crack initiation inclusion and to introduce these parameters in the proposed model, with good agreement for the fatigue life prediction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=inclusions" title="inclusions">inclusions</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20fatigue" title=" ultrasonic fatigue"> ultrasonic fatigue</a>, <a href="https://publications.waset.org/abstracts/search?q=maraging%20300%20steel" title=" maraging 300 steel"> maraging 300 steel</a>, <a href="https://publications.waset.org/abstracts/search?q=crack%20initiation" title=" crack initiation"> crack initiation</a> </p> <a href="https://publications.waset.org/abstracts/141323/effect-of-inclusions-in-the-ultrasonic-fatigue-endurance-of-maraging-300-steel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141323.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">214</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2248</span> Ultrasonic Spectroscopy of Polymer Based PVDF-TrFE Composites with CNT Fillers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Belovickis">J. Belovickis</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Samulionis"> V. Samulionis</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Banys"> J. Banys</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20V.%20Silibin"> M. V. Silibin</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20V.%20Solnyshkin"> A. V. Solnyshkin</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20V.%20Sysa"> A. V. Sysa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ferroelectric polymers exhibit good flexibility, processability and low cost of production. Doping of ferroelectric polymers with nanofillers may modify its dielectric, elastic or piezoelectric properties. Carbon nanotubes are one of the ingredients that can improve the mechanical properties of polymer based composites. In this work, we report on both the ultrasonic and the dielectric properties of the copolymer polyvinylidene fluoride/tetrafluoroethylene (P(VDF-TrFE)) of the composition 70/30 mol% with various concentrations of carbon nanotubes (CNT). Experimental study of ultrasonic wave attenuation and velocity in these composites has been performed over wide temperature range (100 K – 410 K) using an ultrasonic automatic pulse-echo tecnique. The temperature dependences of ultrasonic velocity and attenuation showed anomalies attributed to the glass transition and paraelectric-ferroelectric phase transition. Our investigations showed mechanical losses to be dependent on the volume fraction of the CNTs within the composites. The existence of broad hysteresis of the ultrasonic wave attenuation and velocity within the nanocomposites is presented between cooling and heating cycles. By the means of dielectric spectroscopy, it is shown that the dielectric properties may be tuned by varying the volume fraction of the CNT fillers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotubes" title="carbon nanotubes">carbon nanotubes</a>, <a href="https://publications.waset.org/abstracts/search?q=polymer%20composites" title=" polymer composites"> polymer composites</a>, <a href="https://publications.waset.org/abstracts/search?q=PVDF-TrFE" title=" PVDF-TrFE"> PVDF-TrFE</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20spectroscopy" title=" ultrasonic spectroscopy"> ultrasonic spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/40938/ultrasonic-spectroscopy-of-polymer-based-pvdf-trfe-composites-with-cnt-fillers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40938.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">340</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2247</span> Ultrasonic Techniques to Characterize and Monitor Water-in-Oil Emulsion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20A.%20Alshaafi">E. A. Alshaafi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Prakash"> A. Prakash</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Oil-water emulsions are commonly encountered in various industrial operations and at different stages of crude oil production and processing. Emulsions are often difficult to track and treat and can cause a number of costly problems which need to be avoided. The characteristics of the emulsion phase can vary with crude composition and types of impurities present in oil. The objectives of this study are the development of ultrasonic techniques to track and characterize emulsion phase generated during production and cleaning of crude oil. The position of emulsion layer is monitored with the help of ultrasonic probes suitably placed in the vessel. The sensitivity of the technique and its potential has been demonstrated based on extensive testing with different oil samples. The technique is also being developed to monitor emulsion phase characteristics such as stability, composition, and droplet size distribution. The ultrasonic parameters recorded are changes in acoustic velocity, signal attenuation and its frequency spectrum. Emulsion has been prepared with light mineral oil sample and the effects of various factors including mixing speed, temperature, surfactant, and solid particles concentrations have been investigated. The applied frequency for ultrasonic waves has been varied from 1 to 5 MHz to carry out a sensitivity analysis. Emulsion droplet structure is observed with optical microscopy and stability is examined by tracking the changes in ultrasonic parameters with time. A model based on ultrasonic attenuation spectroscopy is being developed and tested to track changes in droplet size distribution with time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20techniques" title="ultrasonic techniques">ultrasonic techniques</a>, <a href="https://publications.waset.org/abstracts/search?q=emulsion" title=" emulsion"> emulsion</a>, <a href="https://publications.waset.org/abstracts/search?q=characterization" title=" characterization"> characterization</a>, <a href="https://publications.waset.org/abstracts/search?q=droplet%20size" title=" droplet size"> droplet size</a> </p> <a href="https://publications.waset.org/abstracts/74038/ultrasonic-techniques-to-characterize-and-monitor-water-in-oil-emulsion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74038.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">175</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2246</span> Zinc Borate Synthesis Using Hydrozincite and Boric Acid with Ultrasonic Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=D.%20S.%20Vardar">D. S. Vardar</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20S.%20Kipcak"> A. S. Kipcak</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20T.%20Senberber"> F. T. Senberber</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20M.%20Derun"> E. M. Derun</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Piskin"> S. Piskin</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Tugrul"> N. Tugrul</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Zinc borate is an important inorganic hydrate borate material, which can be use as a flame retardant agent and corrosion resistance material. This compound can loss its structural water content at higher than 290°C. Due to thermal stability; Zinc Borate can be used as flame reterdant at high temperature process of plastic and gum. In this study, the ultrasonic reaction of zinc borates were studied using hydrozincite (Zn5(CO3)2•(OH)6) and boric acid (H3BO3) raw materials. Before the synthesis raw materials were characterized by X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR). Ultrasonic method is a new application on the zinc borate synthesis. The synthesis parameters were set to 90°C reaction temperature and 55 minutes of reaction time, with 1:1, 1:2, 1:3, 1:4 and 1:5 molar ratio of starting materials (Zn5(CO3)2•(OH)6 : H3BO3). After the zinc borate synthesis, the products analyzed by XRD and FT-IR. As a result, optimum molar ratio of 1:5 (Zn5(CO3)2•(OH)6:H3BO3) is determined for the synthesis of zinc borates with ultrasonic method. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=borate" title="borate">borate</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20method" title=" ultrasonic method"> ultrasonic method</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20borate" title=" zinc borate"> zinc borate</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20borate%20synthesis" title=" zinc borate synthesis"> zinc borate synthesis</a> </p> <a href="https://publications.waset.org/abstracts/32481/zinc-borate-synthesis-using-hydrozincite-and-boric-acid-with-ultrasonic-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32481.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">407</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2245</span> Experimental Investigation on Over-Cut in Ultrasonic Machining of WC-Co Composite</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ravinder%20Kataria">Ravinder Kataria</a>, <a href="https://publications.waset.org/abstracts/search?q=Jatinder%20Kumar"> Jatinder Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20S.%20Pabla"> B. S. Pabla</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ultrasonic machining is one of the most widely used non-traditional machining processes for machining of materials that are relatively brittle, hard, and fragile such as advanced ceramics, refractories, crystals, quartz etc. Present article has been targeted at investigating the impact of different experimental conditions (power rating, cobalt content, tool material, thickness of work piece, tool geometry, and abrasive grit size) on over cut in ultrasonic drilling of WC-Co composite material. Taguchi’s L-36 orthogonal array has been employed for conducting the experiments. Significant factors have been identified using analysis of variance (ANOVA) test. The experimental results revealed that abrasive grit size and tool material are most significant factors for over cut. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ANOVA" title="ANOVA">ANOVA</a>, <a href="https://publications.waset.org/abstracts/search?q=abrasive%20grit%20size" title=" abrasive grit size"> abrasive grit size</a>, <a href="https://publications.waset.org/abstracts/search?q=Taguchi" title=" Taguchi"> Taguchi</a>, <a href="https://publications.waset.org/abstracts/search?q=WC-Co" title=" WC-Co"> WC-Co</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20machining" title=" ultrasonic machining"> ultrasonic machining</a> </p> <a href="https://publications.waset.org/abstracts/48008/experimental-investigation-on-over-cut-in-ultrasonic-machining-of-wc-co-composite" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/48008.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">398</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2244</span> The Design of Acoustic Horns for Ultrasonic Aided Tube Double Side Flange Making</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kuen-Ming%20Shu">Kuen-Ming Shu</a>, <a href="https://publications.waset.org/abstracts/search?q=Jyun-Wei%20Chen"> Jyun-Wei Chen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Encapsulated O-rings are specifically designed to address the problem of sealing the most hostile chemicals and extreme temperature applications. Ultrasonic vibration hot embossing and ultrasonic welding techniques provide a fast and reliable method to fabricate encapsulated O-ring. This paper performs the design and analysis method of the acoustic horns with double extrusion to process tube double side flange simultaneously. The paper deals with study through Finite Element Method (FEM) of ultrasonic stepped horn used to process a capsulated O-ring, the theoretical dimensions of horns, and their natural frequencies and amplitudes are obtained through the simulations of COMOSOL software. Furthermore, real horns were fabricated, tested and verified to proof the practical utility of these horns. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=encapsulated%20O-rings" title="encapsulated O-rings">encapsulated O-rings</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20vibration%20hot%20embossing" title=" ultrasonic vibration hot embossing"> ultrasonic vibration hot embossing</a>, <a href="https://publications.waset.org/abstracts/search?q=flange%20making" title=" flange making"> flange making</a>, <a href="https://publications.waset.org/abstracts/search?q=acoustic%20horn" title=" acoustic horn"> acoustic horn</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20analysis" title=" finite element analysis"> finite element analysis</a> </p> <a href="https://publications.waset.org/abstracts/31506/the-design-of-acoustic-horns-for-ultrasonic-aided-tube-double-side-flange-making" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31506.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">318</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2243</span> 2D-Modeling with Lego Mindstorms</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Miroslav%20Popelka">Miroslav Popelka</a>, <a href="https://publications.waset.org/abstracts/search?q=Jakub%20Nozicka"> Jakub Nozicka</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The whole work is based on possibility to use Lego Mindstorms robotics systems to reduce costs. Lego Mindstorms consists of a wide variety of hardware components necessary to simulate, programme and test of robotics systems in practice. To programme algorithm, which simulates space using the ultrasonic sensor, was used development environment supplied with kit. Software Matlab was used to render values afterwards they were measured by ultrasonic sensor. The algorithm created for this paper uses theoretical knowledge from area of signal processing. Data being processed by algorithm are collected by ultrasonic sensor that scans 2D space in front of it. Ultrasonic sensor is placed on moving arm of robot which provides horizontal moving of sensor. Vertical movement of sensor is provided by wheel drive. The robot follows map in order to get correct positioning of measured data. Based on discovered facts it is possible to consider Lego Mindstorm for low-cost and capable kit for real-time modelling. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=LEGO%20Mindstorms" title="LEGO Mindstorms">LEGO Mindstorms</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20sensor" title=" ultrasonic sensor"> ultrasonic sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=real-time%20modeling" title=" real-time modeling"> real-time modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=2D%20object" title=" 2D object"> 2D object</a>, <a href="https://publications.waset.org/abstracts/search?q=low-cost%20robotics%20systems" title=" low-cost robotics systems"> low-cost robotics systems</a>, <a href="https://publications.waset.org/abstracts/search?q=sensors" title=" sensors"> sensors</a>, <a href="https://publications.waset.org/abstracts/search?q=Matlab" title=" Matlab"> Matlab</a>, <a href="https://publications.waset.org/abstracts/search?q=EV3%20Home%20Edition%20Software" title=" EV3 Home Edition Software "> EV3 Home Edition Software </a> </p> <a href="https://publications.waset.org/abstracts/10888/2d-modeling-with-lego-mindstorms" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10888.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">473</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2242</span> Laser-Ultrasonic Method for Measuring the Local Elastic Moduli of Porosity Isotropic Composite Materials</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alexander%20A.%20Karabutov">Alexander A. Karabutov</a>, <a href="https://publications.waset.org/abstracts/search?q=Natalia%20B.%20Podymova"> Natalia B. Podymova</a>, <a href="https://publications.waset.org/abstracts/search?q=Elena%20B.%20Cherepetskaya"> Elena B. Cherepetskaya</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20A.%20Makarov"> Vladimir A. Makarov</a>, <a href="https://publications.waset.org/abstracts/search?q=Yulia%20G.%20Sokolovskaya"> Yulia G. Sokolovskaya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The laser-ultrasonic method is realized for quantifying the influence of porosity on the local Young’s modulus of isotropic composite materials. The method is based on a laser generation of ultrasound pulses combined with measurement of the phase velocity of longitudinal and shear acoustic waves in samples. The main advantage of this method compared with traditional ultrasonic research methods is the efficient generation of short and powerful probing acoustic pulses required for reliable testing of ultrasound absorbing and scattering heterogeneous materials. Using as an example samples of a metal matrix composite with reinforcing microparticles of silicon carbide in various concentrations, it is shown that to provide an effective increase in Young’s modulus with increasing concentration of microparticles, the porosity of the final sample should not exceed 2%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser%20ultrasonic" title="laser ultrasonic">laser ultrasonic</a>, <a href="https://publications.waset.org/abstracts/search?q=longitudinal%20and%20shear%20ultrasonic%20waves" title=" longitudinal and shear ultrasonic waves"> longitudinal and shear ultrasonic waves</a>, <a href="https://publications.waset.org/abstracts/search?q=porosity" title=" porosity"> porosity</a>, <a href="https://publications.waset.org/abstracts/search?q=composite" title=" composite"> composite</a>, <a href="https://publications.waset.org/abstracts/search?q=local%20elastic%20moduli" title=" local elastic moduli"> local elastic moduli</a> </p> <a href="https://publications.waset.org/abstracts/36229/laser-ultrasonic-method-for-measuring-the-local-elastic-moduli-of-porosity-isotropic-composite-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36229.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">347</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2241</span> Laser - Ultrasonic Method for the Measurement of Residual Stresses in Metals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alexander%20A.%20Karabutov">Alexander A. Karabutov</a>, <a href="https://publications.waset.org/abstracts/search?q=Natalia%20B.%20Podymova"> Natalia B. Podymova</a>, <a href="https://publications.waset.org/abstracts/search?q=Elena%20B.%20Cherepetskaya"> Elena B. Cherepetskaya</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The theoretical analysis is carried out to get the relation between the ultrasonic wave velocity and the value of residual stresses. The laser-ultrasonic method is developed to evaluate the residual stresses and subsurface defects in metals. The method is based on the laser thermooptical excitation of longitudinal ultrasonic wave sand their detection by a broadband piezoelectric detector. A laser pulse with the time duration of 8 ns of the full width at half of maximum and with the energy of 300 µJ is absorbed in a thin layer of the special generator that is inclined relative to the object under study. The non-uniform heating of the generator causes the formation of a broadband powerful pulse of longitudinal ultrasonic waves. It is shown that the temporal profile of this pulse is the convolution of the temporal envelope of the laser pulse and the profile of the in-depth distribution of the heat sources. The ultrasonic waves reach the surface of the object through the prism that serves as an acoustic duct. At the interface ‚laser-ultrasonic transducer-object‘ the conversion of the most part of the longitudinal wave energy takes place into the shear, subsurface longitudinal and Rayleigh waves. They spread within the subsurface layer of the studied object and are detected by the piezoelectric detector. The electrical signal that corresponds to the detected acoustic signal is acquired by an analog-to-digital converter and when is mathematically processed and visualized with a personal computer. The distance between the generator and the piezodetector as well as the spread times of acoustic waves in the acoustic ducts are the characteristic parameters of the laser-ultrasonic transducer and are determined using the calibration samples. There lative precision of the measurement of the velocity of longitudinal ultrasonic waves is 0.05% that corresponds to approximately ±3 m/s for the steels of conventional quality. This precision allows one to determine the mechanical stress in the steel samples with the minimal detection threshold of approximately 22.7 MPa. The results are presented for the measured dependencies of the velocity of longitudinal ultrasonic waves in the samples on the values of the applied compression stress in the range of 20-100 MPa. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=laser-ultrasonic%20method" title="laser-ultrasonic method">laser-ultrasonic method</a>, <a href="https://publications.waset.org/abstracts/search?q=longitudinal%20ultrasonic%20waves" title=" longitudinal ultrasonic waves"> longitudinal ultrasonic waves</a>, <a href="https://publications.waset.org/abstracts/search?q=metals" title=" metals"> metals</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20stresses" title=" residual stresses"> residual stresses</a> </p> <a href="https://publications.waset.org/abstracts/35783/laser-ultrasonic-method-for-the-measurement-of-residual-stresses-in-metals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35783.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">325</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=ultrasonic%20device&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=ultrasonic%20device&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=ultrasonic%20device&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=ultrasonic%20device&page=5">5</a></li> <li class="page-item"><a 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