Bibliografías temáticas / Ultrasonic transducer driver

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Literatura académica sobre el tema "Ultrasonic transducer driver"

Autor: Grafiati

Publicado: 10 de marzo de 2023

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Artículos de revistas sobre el tema "Ultrasonic transducer driver"

Yarn, Kao Feng, King Kung Wu, Kai Hsing Ma y Wen Chung Chang. "Ultrasonic Welding Driver with Class-E Inverter Design". Advanced Materials Research 204-210 (febrero de 2011): 2071–74. http://dx.doi.org/10.4028/www.scientific.net/amr.204-210.2071.

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A robust circuit design using matching technology to design the ultrasonic welding transducer driver with zero voltage switching is proposed. The feedback output voltage is used to control the oscillator frequency to achieve the self-tracking function. Experimental results exhibit that the Class-E inverter circuit can be effectively and stably applied on the high power ultrasonic welding system.

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Zhang, Hong Jie, Fu Jun Wang, Y. Y. Hou y D. W. Zhang. "Driver Design of the Piezoelectric Ultrasonic Transducer for Wire Bonding Based on Direct Digital Synthesis Technology". Materials Science Forum 697-698 (septiembre de 2011): 809–12. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.809.

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In order to design a driver of piezoelectric ultrasonic transducer which can provide high quality ultrasonic signal and be able to realize the frequency tracking rapidly, accurately and intelligently during the bonding process, the ATmega128 microcontroller and AD9851 synthesizer are selected as core components to build an ultrasonic generator and frequency tracking system. The basic circuit units including low pass filter, power amplifier, signal detection and conversion circuits are also established. The test results of the system shows that, based on DDS technology, high quality ultrasonic signal for transducer can be achieved. By combining the two kinds of frequency tracking methods, the system can realize the frequency tracking during the bonding process. It also indicates that the design significantly improve the precision and flexibility of the ultrasonic generator system.

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Giannelli, Pietro, Andrea Bulletti, Maurizio Granato, Giovanni Frattini, Giacomo Calabrese y Lorenzo Capineri. "A Five-Level, 1-MHz, Class-D Ultrasonic Driver for Guided-Wave Transducer Arrays". IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 66, n.º 10 (octubre de 2019): 1616–24. http://dx.doi.org/10.1109/tuffc.2019.2924943.

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Burge, Leah, Lauryn McKenna y Murray Korman. "Photoacoustic medical imaging demonstration using a pulsed LED". INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, n.º 5 (1 de agosto de 2021): 1756–64. http://dx.doi.org/10.3397/in-2021-1919.

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This demonstration of photoacoustics involves a focused light-emitting diode (LED) pulse (620 nm wavelength) which illuminates an optically absorbing target. The rapid expansion generates an ultrasonic pulse detected by an immersion transducer. An LED is a cost-effective alternative to the traditional neodymium-doped Yttrium-Aluminum Garnet (Nd:YAG) laser and laser diode- that is most effective in near-infrared. The LED is driven by a home-made MOSFET driver capable of 100 A pulses. Focused pulses illuminate a horizontal 1.2 mm capillary tube filled with Fast Green Dye. A highly-diffuse Teflon cylindrical cavity (9 cm tall, 6 cm diam) contains the mounted capillary tube. A 2.25 MHz immersion transducer with four low-noise amplifier gain blocks (combined 86 decibel gain, 0.5- 30 MHz bandwidth), detects a time-averaged signal from over 1000 trials. Comparisons are made using India ink. Earlier, T. J. Allen and P. C. Beard used 35 percent hematocrit blood in a capillary tube at a 620 nm wavelength demonstrating the feasibility of photoacoustic medical imaging of vascular systems under the skin or shallow-tissue cancerous tumors (using tomography) as an alternative to radioactive medical imaging. Our work precedes a photoacoustic tomography demonstration using three targets in an open acrylic tank.

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Okamoto, Kyoka y Kan Okubo. "Arrangement design for horizontally omnidirectional audible sound source using facing ultrasonic transducer arrays". Japanese Journal of Applied Physics 61, SG (30 de marzo de 2022): SG1028. http://dx.doi.org/10.35848/1347-4065/ac4c09.

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Abstract We developed an audible sound source with horizontal omnidirectional patterns using facing ultrasonic transducer arrays. The arrays emitted sound with different ultrasonic frequencies from each side, and an audible sound with a differential frequency is generated between input ultrasonic signals. In particular, we designed and created a new array that can control the number of transducers driven in the array. We evaluated the frequency–amplitude characteristics and directivity when the transducers in the array were driven in an annular shape. There is an optimum array shape and number of transducers that can be driven for a specific distance between arrays.

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Engelke, Diana, Bernd Oehme y Jens Strackeljan. "A Novel Drive Option for Piezoelectric Ultrasonic Transducers". Modelling and Simulation in Engineering 2011 (2011): 1–6. http://dx.doi.org/10.1155/2011/910876.

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This paper concentrates on ultrasonic transducers, which are driven by piezoelectric ceramic rings that are arranged in a stack. A novel drive option, where the stack contains a new type of divided piezoelectric rings, is analyzed using the finite element method, prototyped, and tested. To gain a better sense of the vibration behavior, the studies focus initially on one ring and subsequently on the different possibilities to assemble the transducer. The investigations point out that natural bending frequencies can be excited at the transducer. Thus, multiple vibration directions of the tip can be controlled, what can be advantageous for instance in dental applications.

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Liu, Jun Kao, Wei Shan Chen y Xiao Yu Lv. "Study on Ultrasonic Micromateriel Transmission System". Applied Mechanics and Materials 55-57 (mayo de 2011): 2109–12. http://dx.doi.org/10.4028/www.scientific.net/amm.55-57.2109.

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A new type ultrasonic materiel transmission system is proposed in this study. In this new design, bending vibration traveling wave is generated in an elastic pipe by using two uniform sandwich type longitudinal vibration transducers. Thus, elliptical trajectory motions can be formed at particles on the pipe wall, which can drive the materiel by frictional force. The adopting of sandwich transducer in this device can gain large vibration amplitude and improve the electromechanical coupling efficiency. The structure and working principle of the proposed design are introduced. The transducer and the pipe are designed and analyzed by using FEM method. The longitudinal vibration mode of the transducer and the bending vibration mode of the pipe are analyzed, and the resonant frequencies of these two modes are tuned to be close. A prototype system is fabricated and measured.

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Niu, Xiaoyu, Yuqi Meng, Zihuan Liu, Ehsan Vatankhah y Neal A. Hall. "MEMS microphones as ultrasonic transducers". Journal of the Acoustical Society of America 152, n.º 4 (octubre de 2022): A50—A51. http://dx.doi.org/10.1121/10.0015506.

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We demonstrate the transmission of ultrasound in air using a transducer that resembles a MEMS microphone in its construction. The device comprises a compliant 1 mm diameter diaphragm, a stiff perforated backplate electrode, and a back-volume. The diaphragm is driven using AC signals with peak values that exceed the pull-in voltage of the diaphragm. Relatively large diaphragm displacements are achieved as diaphragm oscillations traverse the complete 2.30-micrometer diaphragm-backplate gap in response to excitation waveforms spanning from 40 kHz to 150 kHz. Large amplitude diaphragm vibration is advantageous for high SPL applications in air, as sound pressure is directly proportional to diaphragm displacement for a given operating frequency. Diaphragm vibration profiles are measured using a scanning laser Doppler vibrometer, and resultant acoustic pressure waveforms in air are measured using a broadband microphone. We demonstrate how nonlinear features of the electrostatic transducer can be exploited to generate loud, broadband signals. We also discuss interesting applications using an array of these transducers.

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Yamaguchi, Daisuke, Takefumi Kanda, Koichi Suzumori, Kazuya Fujisawa, Kiyonori Takegoshi y Takashi Mizuno. "Ultrasonic Motor Using Two Sector-Shaped Piezoelectric Transducers for Sample Spinning in High Magnetic Field". Journal of Robotics and Mechatronics 25, n.º 2 (20 de abril de 2013): 384–91. http://dx.doi.org/10.20965/jrm.2013.p0384.

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This paper presents the design, fabrication process, and evaluation of an ultrasonic motor for sample spinning in a high magnetic field of solid-state Nuclear Magnetic Resonance (NMR). To decrease effects of the magnetic field on rotation, all motor components are made of materials that have low magnetic permeability. The motor, including the sample casing, is a maximum 31 mm in diameter and 50 mm high. The motor has two sector-shaped piezoelectric transducers. One transducer generates two different vibration modes, longitudinal and flexural, when two sinusoidal voltages are applied to transducers. To confirm that transducers can be driven in a high magnetic field, the effect of the magnetic field on the transducer was evaluated. The motor was driven at a frequency of 329.0 kHz. The maximum rotation speed and starting torque were 1.50 × 103rpm and 26 µNm when applied voltage was 40 Vp-p. The rotation speed, controlled by a proportional-integral control system, was 1.20 × 103rpm in a 7.0-T magnetic field. The motor was also applied to the sample spinning system of a high-resolution NMR spectrometer. We succeeded in obtaining1H-NMR signals of H2O. The motor can therefore be used for a sample spinning system in a high magnetic field.

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Liu, Jun Kao, Tao Xie, Wei Shan Chen y Chang Hua Jia. "A Standing Wave Ultrasonic Motor Using Longitudinal Vibration Transducers". Key Engineering Materials 474-476 (abril de 2011): 661–65. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.661.

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A new type standing wave ultrasonic motor is proposed in this study. In this design, three longitudinal vibration transducers are clamped on the inner side of a ring with driving teeth by screws. Bending standing wave can be generated in the ring by the longitudinal vibrations of the transducers. Thus, oblique linear simple harmonic vibrations are formed on the teeth, which can drive the rotor by frictional force. The structure and working principle of the proposed design are introduced. The motor is designed and analyzed by using FEM method. A standing wave is gained after the degeneration between the bending vibration of the ring and the longitudinal vibration of the transducer. The test results of the prototype motor verify the feasibility of the proposed design.

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Más fuentes

Tesis sobre el tema "Ultrasonic transducer driver"

Feng, Shao Lin y 馮紹霖. "Pulser and Transducer Driver for Ultrasonic Imaging Systems". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/08894732044223359413.

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碩士
國立清華大學
工程與系統科學系
103
This thesis proposes to use current type DAC to replace the traditional unipolar and bipolar pulse generator. Using digital signal to control pulse generator can be effectively used in ultrasound scanning with variety mode, Using 200Mhz sampling frequency to control double 6-bit DAC with 128 current cell current type output with 100 ohm loading resistor to generates sine wave signal with 10MHz frequency and 40V pick voltage. Compared to conventional pulse generator , current type DAC have provide more diverse selection , make it easier to change signal amplitude and frequency, eliminating the adder and multiplier to make the system more compact , the characteristics of this work is that replaces the traditional logic circuit switch with current type logic gates MCML (Mos Current Mode Logic) using to enhance the reaction speed of the decoder that let the second harmonic distortion of the output sine wave can be pull to 39.9dbc, and reduce the process variation of current source by using staggered layout techniques .

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Chou, Shih-Hsun y 周士勛. "Design and application of an ultrasonic transducer driver circuit with phase controlling frequency calibration". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/87846257924493020681.

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碩士
國立臺灣大學
電子工程學研究所
101
Piezoelectric transducer is the most application method for ultrasonic sensor. Ultrasonic sensor is widely used in our life such as automobile parking sensor, water cleaning system, medical imaging…etc. However, the characteristics of piezoelectric materials will change with the environment variation, the process deviation, the damage of the material…etc. Thus, the proper operation point for an ultrasonic transducer will be different from time to time and from the other transducers. In this thesis, equivalent circuit and the operation of the ultrasonic transducer is investigated in detail. With discuss, the most efficiency frequency will be known. Besides, a circuit can trace the proper operating frequency for an ultrasonic transducer by phase controlling, and driving ultrasonic transducer, is proposed in this thesis. Finally, the calibration circuit is implemented and verified by ultrasonic transducer which have different operating frequency. Experiment results show that ultrasonic transducers can drive at the most efficiency frequency with inaccuracy error less than 0.15%.

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Giannelli, Pietro. "A Testbench System for Structural Health Monitoring with Guided-Wave Ultrasound". Doctoral thesis, 2018. http://hdl.handle.net/2158/1125295.

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This dissertation covers the design of the transducers and electronics of a structural health monitoring (SHM) testbench system targeted at plate-like structures. The health inspection principle behind the system is the transmission and reception of guided-wave ultrasound along the structure under test, using piezoelectric transducers made of poled polyvinylidene fluoride (PVDF) film. The aim of this work is the creation of a system with custom electronics that can serve as a versatile testbench for the research activities in the field of SHM of complex material, such as carbon and glass-fiber composites, and will eventually bridge the gap between research and the development of highly-integrated sensor networks to be used in industrial, automotive, and aerospace applications. While many guided-wave SHM techniques base their operation on monolithic elements, the proposed system moves in the direction of providing multichannel transmit/receive capabilities to each transducer, transforming them in small-scale phased arrays. Since different SHM applications require different topologies and number of transducers to effectively cover a structure, the system architecture is designed around the vision of a (wired) sensor network: each transducer is connected to its own dedicated electronics, emulating a sensor node. Multiple identical nodes can thus be placed on the target structure and interact to perform the required health monitoring functions in a distributed fashion. The transducers designed for this system are an improvement of the well-known interdigital transducer (IDT), where a few novelties are added: a circular sensor (intended for isotropic guided-wave reception) and a resistive temperature device. A different version of the IDT is also presented where every electrode (finger) has an independent connection that can be attached to different transmitters and receivers, thus creating an array. The electronics are designed to include multichannel transmission and data acquisition tailored to the proposed transducers. Guided-wave generation is performed by high-voltage, 5-level, differential class D amplifiers that can generate arbitrary signals up to 1MHz with inter-channel synchronization. The signal reception circuitry includes two swappable pre-amplifier stages (charge-mode and voltage-mode) in addition to a standard data acquisition chain. The electronics are completed by a system-on-chip (FPGA plus ARM processor) that operates the various components, performs signal analysis, and exchanges data with other nodes. The core contents of this dissertation include the development and testing of the transducers and a subset of the system electronics: the ultrasound transmission and reception modules. The remainder of the system is presented at the architectural level.

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Chen, Yi-Ling y 陳奕伶. "Resonance-Tracking Relay-Feedback Drive of Ultrasonic Transducer". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/86644387244612735513.

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碩士
國立中山大學
電機工程學系研究所
104
This thesis utilizes the relay feedback approach to designing a resonance- tracking driver for ultrasonic transducers of different frequencies ranging from 20 kHz to 60 kHz. The driver connected with the transducer in a feedback loop constitutes a relay feedback system, which automatically oscillates and generates sinusoidal driving voltage right at the targeted resonant frequency of the transducer, thereby achieving better transducer efficiency. The driver mainly consists of an FPGA and a class-D power amplifier. The contribution of this thesis is to design the algorithms on the FPGA. The algorithms include a tunable bandpass filter, a tunable delay, and an optimal pulse width modulator, which together make the relay feedback driver more intelligent and more precise.

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Li, Wan-Chen y 李宛蓁. "Automatic resonance frequency tracking driver for ultrasonic transducers using a power meter". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/x3yvdd.

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碩士
義守大學
生物醫學工程學系
104
The Current research relates to ultrasound probes, which according to their application use different frequencies. In general, driving an ultrasound probe must find a suitable way to manually adjust the operating frequency of the probe, but it’s not convenient and accurate. However, in a suitable operating frequency, its power will become higher. Therefore, in this study, we designed a system that can adjust to a suitable and accurate operating frequency automatically. In this study, we developed a function generator using an AD5930 which can produce continuous or burst waveforms. The use of burst waveforms can prevent damage caused by overheat. The output signal is then fed to the inverter to adjust the signal amplitude according to the power supply voltage and drive the ultrasound transducer. A C++ produced software was used to upload parameters to an Arduino UNO microcontroller board so that it can program the AD5930 burst waveform generator to adjust the parameters of the output signal such as the frequency and the burst time. Using this hardware and software concept applied on different ultrasound transducers, we expect to expand the application of ultrasound transducers in the biomedical field. An Arduino microcontroller combined with the AD5930 circuit produces output digital and/or analog signals with stable frequency. The user can easily and conveniently adjust to a desired fixed output frequency or set an increasing sweep frequency. This type of device could be used in various ultrasonic probe applications.

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Capítulos de libros sobre el tema "Ultrasonic transducer driver"

Bindal, V. N., T. K. Saksena, S. K. Jain y Reeta Gupta. "INVESTIGATIONS ON EVALUATION OF TRANSDUCER PERFORMANCE AT HIGH ELECTRIC DRIVES". En Ultrasonics International 87, 825–31. Elsevier, 1987. http://dx.doi.org/10.1016/b978-0-408-02348-1.50142-6.

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Actas de conferencias sobre el tema "Ultrasonic transducer driver"

Moro, Kosuke, Jumpei Okada, Keisuke Takada, Shin Yoshizawa y Shin-ichiro Umemura. "Staircase-wave drive circuit to drive therapeutic array transducer". En 2010 IEEE Ultrasonics Symposium (IUS). IEEE, 2010. http://dx.doi.org/10.1109/ultsym.2010.5935674.

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Unlugedik, Asli, Abdullah Atalar, Coskun Kocabas, H. Kagan Oguz y Hayrettin Koymen. "Electrically unbiased driven airborne capacitive micromachined ultrasonic transducer design". En 2012 IEEE International Ultrasonics Symposium. IEEE, 2012. http://dx.doi.org/10.1109/ultsym.2012.0248.

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Kanda, Takefumi, Naoyuki Ishikawa, Koichi Suzumori, Hidekazu Yoshizawa y Yoshiaki Yamada. "Droplets generation using micropore plate driven by Langevin type transducer". En International Congress on Ultrasonics. Vienna University of Technology, 2007. http://dx.doi.org/10.3728/icultrasonics.2007.vienna.1436_kanda.

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Kiuchi, Hironobu, Shun Kimura, Ari Hamdani, Hideharu Takahashi, Hiroshige Kikura, Daisuke Sasa y Shuichi Ohmori. "Fundamental Study on Development of Air-Coupled Ultrasonic Imaging Measurement for Fuel Debris Inspection". En 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-82150.

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Retrieval of fuel debris is one of the most urgent issues regarding the decommissioning of Fukushima Daiichi Nuclear Power Plant (NPP). A retrieval of fuel debris requires a measurement system which can be applied in the severe environment to investigate inside the Reactor Pressure Vessel (RPV) and the Control Rod Drive (CRD) housing. In this study, an air-coupled ultrasonic measurement is proposed because of the feasibility of its application in the severe environment such as the high-radiation atmosphere. However, compared with using it in water or solids, there are some difficulties with applying the air-coupled ultrasonic technique. Therefore, we employed a point-focused transducer which can converge ultrasonic energy in a small area. As a fundamental study, this paper focuses on the experimental assessment of the potential feasibility and property of the developed air-coupled ultrasonic imaging. Firstly, to obtain the property and characteristics of the point-focused transducer, the sound field of the transducer was measured. The sound field showed the convergence rate, acoustic intensity and the beam width of the transducer. Secondly, in order to improve Signal to Noise ratio (SN ratio), the ultrasonic imaging method using a frequency correlation was designed taking the feeble ultrasonic echoes from complex shape object into consideration. Finally, the shape of a test specimen, which imitates a fuel debris, was measured with the developed imaging system. The ultrasonic image of the specimen showed a good agreement with a photo. In conclusion, the imaging using air-coupled point-focused ultrasound was developed to successfully visualize a mock fuel debris from a relatively short distance of 40 mm – 100 mm.

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Doody, Christopher B., Robert D. White, Jaspreet S. Wadhwa y David F. Lemmerhirt. "Characterization and Modeling of Capacitive Micromachined Ultrasonic Transducers for Diagnostic Ultrasound". En ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67861.

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This paper describes the characterization and modeling of capacitive micromachined ultrasonic transducers (cMUTs). Computational models of the transducers were produced through the combined use of finite element analysis (FEA) and lumped element modeling. Frequency response plots were generated for both transducers in air and water environments. Through the use of laser Doppler velocimetry, transient step response and frequency sweep tests were performed on single array elements. These measurements are compared to the predicted results represented in the models. The computational results for both coupled and uncoupled arrays are compared, and show a significant increase in the array bandwidth due to coupling. Frequency sweep tests were also performed on column array elements, and results were compared between driven and adjacent, non-driven columns.

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Liu, Shaohua y Fuliang Wang. "Characteristic analysis of transducer drive current in ultrasonic wire bonding process". En High Density Packaging (ICEPT-HDP). IEEE, 2009. http://dx.doi.org/10.1109/icept.2009.5270610.

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Kurosawa, M., K. Nakazawa, Y. Koike y S. Ueha. "Focusing type high power transducer using burst drive for ultrasonic welding". En 1993 IEEE Ultasonics Symposium. IEEE, 1993. http://dx.doi.org/10.1109/ultsym.1993.339461.

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Mojrzisch, Sebastian y Joerg Wallaschek. "Amplitude Modulation of Nonlinear Piezoelectric Transducers for Ultrasonic Levitation". En ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/smasis2011-5111.

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Ultrasonic levitation bearings are a new kind of bearing system that offers the advantages of air-bearings combined with dynamically adjustable supporting force without the need for pressurized air. Such systems are typically driven close or in their resonance frequency, due to energetic reasons. In this contribution the two possible driving methods, namely forced- and self-excitation, are compared in sense of their transient amplitude behavior in the presence of nonlinearities. It is known that during amplitude changes at high vibration amplitudes the system’s resonance frequency varies with Duffing-characteristic due to the nonlinear stiffness of piezoelectric material. It will be shown that self-excitation is the preferable driving method in sense of obtaining a high bandwidth of amplitude.

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Poongodan, Prajith Kumar, Frank Vanselow y Linus Maurer. "A Two-Level, High Voltage Driver Circuit with Nanosecond Delay for Ultrasonic Transducers". En 2020 9th International Conference on Modern Circuits and Systems Technologies (MOCAST). IEEE, 2020. http://dx.doi.org/10.1109/mocast49295.2020.9200247.

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Pak, Abbas y Amir Abdullah. "Correct Prediction of the Vibration Behavior of a High Power Ultrasonic Transducer by FEM Simulation". En 2007 International Conference on Power Engineering, Energy and Electrical Drives. IEEE, 2007. http://dx.doi.org/10.1109/powereng.2007.4380196.

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