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Dissertations / Theses on the topic 'Ultrasonic research'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Tychkov, D. V., and C. V. Bazilo. "The research of piezoelectric transducers for ultrasonic medical systems." Thesis, Sumy State University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65251.

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Piezoelectric transducers are widely used in the medical systems, special permanently in ultrasonic inhalation devices for spraying of drugs for the treatment of upper respiratory tract and lungs. The devices are simple enough, convenient and reliable in operation. It was developed a research installation for the research and parameters optimization of piezoelectric transducers that can be used as nebulizers, and aerosol cloud formation from an aqueous solution of drugs.

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Schiro, Arthur Leland. "A research platform for ultrasonic elastograpy based targeted prostate biopsy." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/44541.

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Chiu, Chi-tat, and 趙志達. "Design and development of a programmable micro-ultrasound research platform with parallel computing capacity." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B46290977.

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4

Horne, Michael R. "Scanning measurement testbed for advanced nondestructive evaluation." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/30979.

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New materials and manufacturing processes, and the quest for economy and user safety, have necessitated the development of nondestructive testing methods to quantify the life and reliability of a product during manufacture and service. Described herein, is a testbed to be used in the research and development of these testing methods. A brief motivation for using ultrasonics applied to nondestructive evaluation is followed by a chapter on the feasibility of using a unique testing method and animated data presentation on advanced composite materials. This testing method, conceived by the author,

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Vandenbossche, Benoit. "Measurement of ultrasonic wave mode transition in unidirectional graphite/epoxy composites." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10242009-020340/.

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6

Tiwari, Anil. "A feasibility study of the acousto-ultrasonic technique to assure the quality of adhesively bonded sheet metal." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42207.

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This thesis contains the results of Phase-1 of a project funded by Ford Motor Company. The objective is to study the feasibility of Acousto-Ultrasonics (AU) as a nondestructive technique for assuring the quality of adhesively bonded sheet-metal used for automobiles. Other nondestructive (NDT) techniques were also applied viz., ultrasonics. radiography and thermography to supplement and verify the results of the AU technique. The AU Technique demonstrated the best results in terms of its sensitivity to the variations in the properties of the interface. Regions having kissing bonds or regions

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Buttram, Jonathan D. "Characterization of high temperature creep in siliconized silicon carbide using ultrasonic techniques." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03122009-040453/.

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Chandrana, Chaitanya K. "Development of A Focused Broadband Ultrasonic Transducer for High Resolution Fundamental and Harmonic Intravascular Imaging." Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1244664717.

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Мозгова, Юлія Анатоліївна, Юлия Анатольевна Мозговая, Yuliia Anatoliivna Mozghova, Олена Геннадіївна Васильєва, Елена Геннадьевна Васильева, and Olena Hennadiivna Vasylieva. "Clinical and ultrasonic features of defeat of palatine tonsils at the sick teenagers with chronic tonsillitis." Thesis, Medical University Pleven, 2014. http://essuir.sumdu.edu.ua/handle/123456789/37804.

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The chronic inflammation of palatine tonsils is characterized as a multifactorial immunopathological process and takes one of the leading places among nasopharyngeal pathology, especially in children and persons of young age. The aim of our research was investigating of clinical and ultrasonic features of defeat of palatine tonsils at children of teenage age with chronic tonsillitis.

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Mazzoccoli, Jason Paul. "Properties of poly(ethylene glycol) diacrylate blends and acoustically focused multilayered biocomposites developed for tissue engineering applications." online version, 2008. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=case1212612650.

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SMITH, DENISE ANNE BUSH. "In vitro Characterization of Echogenic Liposomes (ELIP) for Ultrasonic Delivery of Recombinant Tissue-type Plasminogen Activator (rt-PA)." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1214234148.

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Wang, Zhaowei. "Two Approaches for Cell Retention in Perfusion Culture Systems." Cleveland State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=csu1274106674.

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13

Hardcastle, J. L. "Novel voltammetric methods in heavily passivating media." Thesis, University of Oxford, 2002. http://ora.ox.ac.uk/objects/uuid:7ef17e49-dd12-4c3b-b2a0-b94605ccb1fa.

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The work contained in this thesis demonstrates that the introduction of power ultrasound into electrochemical systems can broaden the scope of techniques such as anodic stripping voltammetry. Analysis is facilitated by the well-documented phenomena associated with ultrasound, cavitation and acoustic streaming. Cavitation is caused by the collapse of voids created by ultrasonic compression and rarefaction of the solution and results in both localised high temperatures and pressures in the bulk solution and microjetting on the surface. Precise mechanistic details are still open to debate but the

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Shannon, Russell A. "Ultrasound to assess lipid content in salmon muscle." Thesis, University of Oxford, 2002. http://ora.ox.ac.uk/objects/uuid:fbbd2a50-ac06-4740-9a11-119efe5e7d5f.

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In this thesis, ultrasound pulse transit time measurement techniques are applied to aquaculture, specifically to measure the intramuscular fat in salmon muscle tissue. The main advantages of this technique are that it is noninvasive and that it uses low-cost components. Fat in salmon muscle exists as oil dispersed throughout the tissue. Therefore, a phantom was built to empirically model a dispersed fat system. The phantom was a mixture of low-fat milk and high-fat double cream. By varying the quantities of each component, the fat level of the phantom could be controlled. A trend of increasing

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González, Bellido Eduardo André. "Real-time quantitative sonoelastography in an ultrasound research system." Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/9511.

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Quantitative Sono-Elastographie ist eine neue Technologie für die Ultraschall Bildgebung, die Radiologen maligne Tumoren ohne Risiko der strahlungsinduzierten Krebs (d.h. Mammographie) zu erfassen können. Aufgrund gefunden Rechenkomplexität in der aktuellen Algorithmen, Implementierung von Echtzeit-Anwendungen, die Prüfungsverfahren profitieren wurde jedoch noch nicht berichtet. Zusätzlich, aktuelle Schätzer für die Darstellung eine Elastizität Bilder vorhanden Artefakte der hohen Schätzung Varianz, die die Techniker in die Gegenwart steifer Massen irreführen könnten und zwar, falsch-po

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Sahare, Swapnil Ashok. "Enhancing the Photovoltaic Efficiency of a Bulk Heterojunction Organic Solar Cell." TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1609.

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Active layer morphology of polymer-based solar cells plays an important role in improving power conversion efficiency (PCE). In this thesis, the focus is to improve the device efficiency of polymer-based solar cells. In the first objective, active layer morphology of polymer-solar cells was optimized though a novel solvent annealing technique. The second objective was to explore the possibility of replacing the highly sensitive aluminum cathode layer with a low-cost and stable alternative, copper metal. Large scale manufacturing of these solar cells is also explored using roll-to-roll printing

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YANG, CHEN-HUI, and 楊晨暉. "Research on Bimorph Ultrasonic Motors." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/34110834183269431690.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>93<br>With the advance of technology, many kinds of consuming electronic products are broadly used in lives. How to make these products smaller and lighter is crucial to the success of these products. The demand of miniaturized mechanisms is gradually increasing. In all kinds of cameras, the focusing and zooming systems rely heavily on coil motors that move the lenses. However, the insufficiencies of coil motors have been an obstacle in the miniaturization of cameras. Therefore, it is a new application to use ultrasonic motors in focusing and zooming systems. The pu

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Chen, Kai-Chih, and 陳凱志. "Research in Dual-Frequency Ultrasonic Distance Measurement." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/91596677214692348052.

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碩士<br>國立中央大學<br>機械工程研究所<br>92<br>This paper proposes two new ultrasonic distance measurment methods. The first is the dual-frequency. In order to improve traditional ultrasonic distance measurement, it takes all detectable received waves to estimate the real time-of-flight. In addition, considering the measurement efficiency and accuracy, we develop a changed-frequency exciting signal instead of dual-frequency one. It can do more measurement in a constant time. Simulation results reveal that arrival time analyses of two measurement methods have much better accuracy than traditional measureme

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Chen, Chia-Wen, and 陳嘉雯. "Research on energy transfer by ultrasonic transducers." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/26jnv6.

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碩士<br>國立雲林科技大學<br>機械工程系碩士班<br>96<br>The thesis explores wireless energy transfer via ultrasonic transducers. Similar to the commonly used “electromagnetic induction” methods which exploit the resonance in electromagnetic fields, this research is based on the resonance of ultrasonic waves in a pair of piezoelectric transmitter and receiver. A concentric holding tool is first devised to ensure good alignment of the pair of transducers. In the resistance-load experiments it is found that maximum energy can be transferred if the load resistor is 1.922kΩ, and the frequency of ultrasound is

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Lin, Wei-Chih, and 林韋志. "Research on Group Robot Using Ultrasonic Radar." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5p3agj.

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碩士<br>健行科技大學<br>電機工程系碩士班<br>105<br>In this paper, we design an Ultrasonic Radar device using three ultrasonic and servo motors, using it as a group of robot behavior monitoring. We use Arduino nano microcontrollers as host and slave for group robots, respectively Using the Ultrasonic Radar we can get the data of each group of robots on the distance and angle, the host at any time to monitor the behavior of the slave action. Finally, the command is sent to the group robot via wireless communication.

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Chen, Li Yang, and 陳力瑒. "Ultrasonic and temperature compensation application ranging research." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/pxgm3v.

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碩士<br>樹德科技大學<br>電腦與通訊系碩士班<br>106<br>The research of this research is to study the principle and characteristics of the ultrasonic sensor. The research mainly includes a single-chip system, the LCD display 1602, the ultrasonic ranging module HC-SR04, and the temperature compensation sensor DS18B20. The single chip applies 8051 system. The 12MHz high-precision oscillation is used in order to obtain a stable clock frequency and to reduce measurement errors. The ultrasonic transceiver circuit is used as the output signal from a C51 single-chip operation system. The speed of sound times the half ro

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Lo, Chia-Chi, and 羅家麒. "Research of Ultrasonic-Polishing and Grinding Mechanism." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/m7gh44.

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碩士<br>國立虎尾科技大學<br>機械與電腦輔助工程系碩士班<br>102<br>Ultrasonic assisted grinding is a fast and efficient method for polishing, grinding their characteristics are shorter than energy saving and high grinding efficiency, but generally selling in the market are light ultrasonic grinding machine grinding, polishing a long time , grinding efficiency is poor. This paper design and manufacture of ultrasonic welding head polishing, welding head design using ANSYS modal analysis to look mesh characteristics Taguchi method to find the best parameters of the target, and the ultrasound machine at the assembly

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Li, Yi-Jiun, and 李易峻. "Research of Ultrasonic Rotary Compound Melting Machine." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/79xwx9.

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碩士<br>國立虎尾科技大學<br>創意工程與精密科技研究所<br>98<br>This study develops a machine tool with indexing function which can carry out semiautomatic ultrasonic rotary melting. This machine tool is developed by using the ultrasonic welding and the rotary melting methods. In addition, the finite element method was used in this study to simulate the vibration mode and optimal design of cascade-form ultrasonic head as the reference for developing the main system of the machine. The microstructure of the joint surface was obtained from experiment, and the control factors of this type of machine were obtained by usi

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Cheng, Chih-sheng, and 鄭誌勝. "Research on short-distance measurement by ultrasonic sensors." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/75167054074413169746.

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碩士<br>國立雲林科技大學<br>機械工程系碩士班<br>95<br>The purpose of this research is to design a short-distance measurement system by ultrasonic sensors. A single ultrasonic transducer is employed to serve concurrently as a transmitter and a receiver. Positions of the barrier are determined by the phase shift between the reflection signal and the source signal. In order to separate the outbound signals from the inbound signals, a resistor is inserted between the signal source and the ultrasonic transducer. This research proposes two different methods, namely “analog method” and “digital method”, to retr

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Lien-KaiChang and 張廉楷. "Research on Novel Piezoelectric Vibrators for Ultrasonic Motors." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/34818220761342792148.

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博士<br>國立成功大學<br>機械工程學系<br>104<br>This dissertation develops two types of novel piezoelectric vibrators for ultrasonic motors. The flextensional ultrasonic motors can provide high thrust force and speed, but there is a risk of internal multilayer piezoelectric ceramic depolarization when the higher voltage is applied. Thus the star-shaped flextensional stator is proposed to increase the operating voltage range of the flextensional ultrasonic motors. The squiggle ultrasonic motors have compact size in motor body, but the required two driving voltage sources causes their driving circuit larger co

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Kuan, Chung-Po, and 関仲伯. "Research of Ultrasonic Plastic Welding Machine Electrical Safety." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/5723q8.

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碩士<br>國立虎尾科技大學<br>機械與電腦輔助工程系碩士班在職專班<br>101<br>This is desktop portable ultrasonic welding machine for lightweight type, suitable for ultrasonic welding teaching or the production and use of small amounts of plastic welding products. This thesis is discussing the This welding machine is currently used in the has not been perfect security; This study on power lines, transmission lines, fuses, junction boxes, etc. insulation resistance and current, resistance, voltage, electrical safety body fever denial and protection, including welding machine housing parts with potentially dangerous security

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CHANG-LUNG, YEN, and 顏昌隆. "Research on Medical Ultrasonic Jelly in Taiwan Market For T Company – Ultrasonic Jelly as an Example." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/w66mfy.

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碩士<br>國立暨南國際大學<br>管理學院經營管理碩士學位學程碩士在職專班<br>105<br>Taiwan's medical equipment industry developed at the early stage of the 1950s, when Taiwan was recovered from the wwll. During the time, the textile industry began to produce bandages and gauze in the early 1960s, Taiwan began to engage in the production of surgical clothing, medical gloves and other infection control products.As the production and sales grew to a certain scale, these medical prodcuts began to enter the global market. According to Ministry of Health and Welfare Food and Drug Administration (2007), , domestic GMP approved registr

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JHENG, JHIH-JIE, and 鄭智杰. "The Research of Auto Parking Based on Ultrasonic Sensor." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/39569422417906276462.

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碩士<br>中華科技大學<br>電子工程研究所碩士班<br>104<br>In this paper, an ultrasonic sensor structure was set up in the Smart Wheeled Mobile Robot (SWMR). Through the ultrasonic sensor the surroundings of parking spaces were detected and the driver’s parking strategy to complete parallel parking, reverse parking, perpendicular parking, and other ways of parking were simulated. The mobile robot SWMR adopted in this paper was introduced by Autodesk. 3ds Max software modeling was employed to design the vehicle body assembly printed with the use of PLA material and a Kingssel-1820 3D printer, as well as the installa

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巫震華. "Research for the characteristics of ultrasonic air levitation system." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/50825875667662237219.

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曾仲盟. "The research on fabricating microstructures using ultrasonic machining technique." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/99996463939123527825.

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碩士<br>國防大學中正理工學院<br>兵器系統工程研究所<br>92<br>Ultrasonic machining (UM) is considered to have a great potential to machine brittle materials with no heat, chemistry and electricity involved during the process. The objective of this thesis is to investigate the feasibility of machining microparts using UM technique. Three different processes — single-step UM, UM using mixed abrasives and UM using s thin-plate tool - were developed in this research based on the special function of UM. In ‘Single-step UM’ process, the effect of grit size of abrasive and federate on the surface and sub-surface

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Lin, Da-Yuan, and 林大源. "Optimization Research of Dual-Frequency Ultrasonic Distance Measurement System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/01754329061974330308.

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碩士<br>國立中央大學<br>光機電工程研究所<br>95<br>This paper deals with the research on the optimization of using the dual frequency method of ultrasonic distance measurement system. Following the research of dual frequency method algorithm, this paper implements it on the ultrasonic distance measurement system and performs complete experiments and analysis. The dual frequency method is improved from the traditional measurement method. The measurement error of the traditional method rises with the increase of distance. Dual frequency method uses two ultrasound waves in slightly different frequencies, so we ar

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Wen, Hung-Te, and 温宏得. "Research of Ultrasonic Interference Measurement System for Robot calibration." Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5311061%22.&searchmode=basic.

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碩士<br>國立中興大學<br>機械工程學系所<br>107<br>This research mainly proposes a measurement system for the positioning accuracy measurement of an industrial robot arm for calibration and compensation of the machine parameters. The measuring device consists of a microphone and two ultrasonic transmitters, that can measure the acoustic interference phenomenon, and then analyzes the stability and resolution of the measurement system. The system has lots of advantages like low cost, small volume, easy to set up and belongs to the non-contact measuring method. There are usually two types of positioning measureme

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殷立釗. "Research on Ultrasonic Assisted Microstructure Hot Embossing of Optical Glass." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/36090816717959572517.

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碩士<br>國立交通大學<br>機械工程學系<br>98<br>Glass hot embossing is an important technique for optical elements fabrication in recent years. It is generally used to manufacture optical lenses with the advantages of low-cost and steady quality. The same technique is also applied to mass produce microstructure optical glass elements by using molds with microstructure surface. In the same time, the ultrasonic assisted manufacture is widely used in plastic forming in recent years. This technique can raise the precision of products as well as reduce the cost of manufacture. Therefore this research focuses on ap

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XU, JIA-WEN, and 許嘉文. "Research the Application of Hybrid Ultrasonic Vibration and Plasma Welding." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/68959756478431133018.

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碩士<br>國立聯合大學<br>機械工程學系碩士班<br>103<br>The objective of this study was to investigate effect of hybrid ultrasonic vibration and plasma welding on the microstructure and properties in A36 steel and SUS 304 stainless steel dissimilar welds. In order to investigate the influence of ultrasonic vibration toward the organization and quality of welding dissimilar metals, the ultrasonic vibration and 308L packing material metals have been employed during the welding process. The direction of ultrasonic vibration was perpendicular to the welding specimen. The research contents included plasma welding, mic

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Li, Chun-Sing, and 李俊興. "Research on Calibration Process of Ultrasonic Flaw Detector for THSRC." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/84257016312667366025.

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碩士<br>國立高雄應用科技大學<br>工業工程與管理系碩士在職專班<br>105<br>With the THSRC in Taiwan western line has become the main transportation, the current high-speed railway running in Taiwan for the Japanese 700T series models, the use of axles for the hollow axle, not only help reduce axle weight, improve mechanical properties, Improve the smooth running and safety of the train, but also conducive to the axle fatigue defects detection. However, this detection work is high dependence on the equipment. This article from the practicality of the study object to THSRC Zuoying depot vehicle maintenance section hollow axl

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Lin, Yu-Wan, and 林于琬. "The Research of robot Building Map with an Ultrasonic Sensor." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/44170930906008598258.

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碩士<br>國立成功大學<br>工程科學系碩博士班<br>93<br>Map-building is one of the basic applications of a robot. It helps that the robot can move around, explore the unknown environment, and then collect information about the environment. However, the result of map-building can be affected by the accuracy of corner recognition considerably. 　　In this study, measurements with a single ultrasonic sensor are presented. The reflection-point-search rule is proposed together with the reflection plan to determine the reflection-point from the measured data. The angle of a corner is then calculated. By using the corner r

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Lu, Tsung-Yen, and 呂宗諺. "Research on improving Ultrasonic Transducer efficiency by wave propagation method." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32015073258432211718.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>99<br>With the advance of technology, piezoelectric transducer with the advantages of low noise, light pain, and well comfortable become more and more popular than electromagnetic motor-driven transducer. Due to low cutting, ultrasonic transducer does not have the advantages of cutting quantity for hard tissue. The purpose of this research is to promote tip displacement and power of ultrasonic transducer.this research is focused on promoting efficiency of piezoelectric transducer, and the main method is that wave propagation is excited by piezoelectric is able to tr

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Lee, Chieh, and 李婕. "Research on Ultrasonic Assisted Hot Embossing of Fisheye Glass Lens." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/957cgh.

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碩士<br>國立交通大學<br>機械工程系所<br>105<br>Because of the changes in human’s lifestyle and technological progress, the need of various types of portable camera devices has gradually increased. Therefore, the manufacturers aim to make optical lens lighter, smaller, and thinner. In addition, as the fisheye lens have advantage of wide viewing angle, they are widely used from camera, mobile phone, to the vehicle and sports photographic devices, such as: sporting camera, driving recorder, vehicle around view monitor system...etc. For this reason, small-size fisheye lens are getting more and more important. H

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Liu, Wei-Chang, and 劉維昌. "The Research of Ultrasonic Assisted Band Saw Machine Chip Removal." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/n7ahrt.

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碩士<br>國立虎尾科技大學<br>機械與電腦輔助工程系碩士班<br>102<br>Low processing efficiency, tool life and accuracy are often found in saws, because in the process of cutting, the blade may suffer many problems under stress such as tension, twisting and cutting forces from the wheel. This paper sheds light on the possibility of increasing the blade cutting force, chip removal rate and material surface accuracy during machining by using the high-amplitude characteristics of ultrasound on C-320GNC bandsaw, thereby increasing tool life to reduce manufacturing cost. In this study, the appearance of horn which provided by

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Jhang, Jhih-Siang, and 張智翔. "Research and Development of Ultrasonic-Welding and Its Processing Parameters." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/4222pg.

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碩士<br>國立虎尾科技大學<br>創意工程與精密科技研究所<br>99<br>This study discussed the ultrasound-assisted welding method. Due to the constrictions of the plastic characters, the plastic products with complex shapes could not be injection molded at one time, thus, adhesion was required. However, since the hot junction technology applied in the plastic adhesion is inefficient, and the adhesive is toxic, which may cause environmental pollution, the traditional adhesion method is unable to adapt to the development need of the modern plastics industry, thus, a new kind of ultrasonic plastic welding technology has been

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Yen, Hao-Shen, and 顏豪伸. "The Research and Development of Ultrasonic Machine for PTFE Welding." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/4mdgjv.

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碩士<br>國立虎尾科技大學<br>機械與電腦輔助工程系碩士班<br>101<br>Sealing elements, such as O-rings, enhance the tightness of machinery and equipment, maintaining stable operation. Seals are typically made of rubber material, which offers several advantages, including strong chemical stability, excellent elasticity, and superior dimensional stability; however, rubber is susceptible to aging and deterioration under certain environments such as high temperatures and exposure to solvents. To resolve this problem, coating chemically stable Teflon series materials on the outer layer of rubber is a method widely promoted b

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Wang, Change-Yu, and 王振宇. "Experiment Research on High Performance Rotary Ultrasonic Assisted Electrical Discharge Machining." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/6z39wa.

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碩士<br>國立高雄應用科技大學<br>模具工程系碩士班<br>102<br>Machining efficiency of convntional Electrical Discharge Machining (EDM) is much lower than that of milling/drilling processing, and it is still the main issue for EDM during the last decades. In the past, hybrid processes of combining EDM and ultrasonic vibration (U-EDM) was verified to be an optional mean for higher speed EDM. But most of them exerted vibration effect on the workpiece, and there was still lack of comprehensive understanding of the ultrasonic assisted effect on such a U-EDM processes. This thesis proposed a rotary ultrasonic assisted EDM

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Liu, Chuan-Chun, and 劉傳俊. "Research and Development of an Underwater Ultrasonic Phased Array Imaging System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/67186359333222737386.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>96<br>The purpose of this thesis is to research and improve the ultrasonic phased array imaging system. In the aspect of scanning system, we use the piezoelectric ceramic with 600 KHz resonance frequency in this system and manufacture a one-dimension transmitting array and a receiving element. By using the beam-controlled technology to trigger the array, we are able to perform the scanning over the target objects. We also apply the independence loop method and the spacing matching method to increase the signals strength of the transmitting array. In the aspect of im

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Guo, Zong-han, and 郭宗翰. "The analysis and research of Nonspecific binding removal with ultrasonic waves." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/08453119350902392419.

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碩士<br>國立中正大學<br>機械工程所<br>96<br>Protein microarrays are high information density bioassays that provide information valuable in early disease diagnosis and biodefense applications. Nonspecific binding is because of the molecular bond. It decreases bioassay sensitivity, specificity, and reproducibility. Commonly, nonspecific binding is mitigated by surfactant addition or excessive, repeated washing. These additional steps add complexity to devices. So research to achieve nonspecific binding removal with ultrasonic microdevices. If want to remove nonspecific binding must break molecular bond. B

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Wu, Che-wei, and 吳哲葳. "Research of the edge profile in trimming process with ultrasonic vibration." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/00059567173506796042.

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碩士<br>國立中央大學<br>機械工程研究所<br>99<br>The paper employs experiment to analysis the trimming problems with ultrasonic vibration. First the result of design Single metal vibration trimming and blanking model to trim the metal. The different clearance, cutting angle, trimming speed are discussed separately to know the effect of punch load and edge profile in trimming process with vibration punch. The result reveals that ultrasonic vibration can decrease the punch load and improve the quality of edge profile by increasing the cutting angle and appropriate clearance and trimming speed.

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NIOU, JYUN-REN, and 牛俊仁. "The Research of PU Microporous Wet-Coagulation with Ultrasonic Oscillating Vapor." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8744r3.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>105<br>With the development of multi-functional textiles, and the global competition that making the requirements of moisture permeability and waterproof is more stringent. People demanding for cloth requirements have increased, and the techniques of breathable waterproof breathable micro-porous control technology gradually mature and diverse. GORE-TEX, which is heard in daily life, is a kind of moisture-permeability and waterproof textile, which is produced the porous by stretching the film. Different between the PU is produced by DMF replacement to achieve the w

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Liu, Jun-Ting, and 劉俊廷. "Research and Development of Ultrasonic Removing Technologies for Precision Injection Molding Workpiece." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/275u5r.

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碩士<br>國立虎尾科技大學<br>創意工程與精密科技研究所<br>99<br>This study developed a semi-automatic ultrasonic vibration removing processor with fast removing capability. The processor was developed based on the processing method of using ultrasonic energy transfer to generate vibration. The vibration removing process uses the vibration produced by ultrasonic generators to build pressure on the workpiece when the horns is lowered to contact it through the amplification displacement of the horns to closely contact the joint surface. When the pressure reaches the trigger level, the energy will be transferred to the p

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YU, JIANG-XING, and 俞匠興. "Research on High Power Factor Half-Bridge Inverter Applied to Ultrasonic Cleaners." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4v8var.

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碩士<br>國立聯合大學<br>電機工程學系碩士班<br>107<br>This thesis uses a three-stage circuit applied to the ultrasonic cleaner, which is sent to the first-stage circuit : the power factor correction circuit by 110V 60Hz AC voltage, and the switch is turned on and off by the pulse width modulation to make the inductor energy storage and energy release, the input current and input voltage are close to the same phase, reducing harmonic distortion and improving power quality. The output voltage is 195V DC voltage. Then, the second-stage circuit is an asymmetric half-bridge DC-DC converter. The input voltage is 195V

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Lai, Zi-Fa, and 賴子發. "Research and development of an intelligent nano-positioning control on ultrasonic motor system." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/90942334927324376353.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>94<br>The research proposed a positioning system with nano resolution. Utilize ultrasonic motor as the actuator, and develop orthogonal signal decoding method for LDGI (Laser Diffraction Grating Interferometer) as displacement feedback with high accuracy. Based on FCMAC (Fuzzy Cerebellar Model Articulation Controller) control algorithm for controlling and predicting the variation of ultrasonic motor friction driving, establishing PC-Based positioning integral system in with BCB (Borland C++ Builder) software and National Instrument DAQ (Data Acquisition) Device, to

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Hsu, Fu-Ya, and 許富雅. "Research on the Nano-Positioning of a Micro-Milling Machine Using the Ultrasonic Motors." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/16858005431829303901.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>98<br>The objective of this research is to develop an X-Y co-planar positioning stage with nanometer resolution using low-cost components and ultrasonic motors controlled by a PC–based CNC ELC 2200 controller. The development stage was integrated with a micro-milling machine that can perform the micro-milling or a diamond tool shaping. The PC–based CNC ELC 2200 controller was applied to develop the closed loop control program programmed with Borland C 3.1 language, to generate the control commands transmitted to the drivers of ultrasonic motors and to perform the pos

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