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Proceedings of the 2010 Symposium on Piezoelectricity, Acoustic Waves and Device Applications

10-13 Dec. 2010

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Displaying Results 1 - 25 of 131
  • [Front cover]

    Publication Year: 2010, Page(s): c1
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  • [Title page]

    Publication Year: 2010, Page(s):i - ii
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  • From the chair

    Publication Year: 2010, Page(s): iii
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  • From the editors

    Publication Year: 2010, Page(s): iv
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  • Committees

    Publication Year: 2010, Page(s):v - vii
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  • List of invited plenary talks

    Publication Year: 2010, Page(s): viii
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (174 KB) | HTML iconHTML

    Provides an abstract of the keynote presentation and a brief professional biography of the presenter. The complete presentation was not made available for publication as part of the conference proceedings. View full abstract»

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  • List of winners of student paper competetion

    Publication Year: 2010, Page(s): ix
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  • [Blank page]

    Publication Year: 2010, Page(s): x
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  • Contents

    Publication Year: 2010, Page(s):xi - xvi
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  • Detecting cavitation signals based on Ultrasonic acoustic emissions technology

    Publication Year: 2010, Page(s):1 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB) | HTML iconHTML

    This paper presents the experimental analysis on the relationship between Ultrasoinc acoustic emissions (UAEs) and water consumption associated with transpiration. In order to avoid background noise interference, the UAEs detecting frequency is between 100 KHz and 1 MHz. From the experiments, the hypothesis can be drawn that irrigation conducts when the UAEs reach a certain threshold, which may be... View full abstract»

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  • Investigation of the temperature dynamics process in the nonlinear optical materials by using PO Z-scan technique

    Publication Year: 2010, Page(s):6 - 10
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (676 KB)

    The spatial and temporal changes of temperature in a novel polymer are investigated by using PO Z-scan technique under ns laser pulse excitation. The PO Z-scan is a new and high sensitivity laser detection technique. It can be employed to investigate nonlinear optical properties. According to the open aperture PO Z-scan experimental results, the nonlinear absorption coefficient of the polymer is d... View full abstract»

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  • Experimental study of mode conversion in pipes on damage detection by using longitudinal ultrasonic guided

    Publication Year: 2010, Page(s):11 - 15
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (733 KB)

    There are three types of modes existing in pipe: longitudinal, bending and torsional modes. The time histories of guided wave propagating in hollow liquid-filled pipe can be determined from the experiment and the numerical simulation. The mode conversion phenomena can be found from these signals. Moreover, the category and generation mechanism of the mode conversion in pipes are investigated. Gene... View full abstract»

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  • Thermo-electro-elastic waves in Pyroelectric media

    Publication Year: 2010, Page(s):16 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (345 KB)

    There are 5 governing equations expressed by displacements, electric potential and temperature in Pyroelectric media, so the Christoffel character equation is a 5×5 matrix. But there are only 4 independent eigenvalues distinguished from zero for the wave propagated in an infinite homogenous space. The reflection and transmission problem is different from the wave propagation problem in an i... View full abstract»

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  • Study on graphical electro-spinning of PZT nano-fibers

    Publication Year: 2010, Page(s):21 - 25
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2023 KB)

    In the past few years, many reports on the application of electro-spinning in the preparation of PZT nano-fibers have been published. However, it is still very difficult to get PZT nano-fibers with the same orientation. To solve this problem, we prepare the collecting plates by MEMS technology and add an auxiliary voltage in our experiment. With these two new methods, we can prepare PZT nano-fiber... View full abstract»

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  • Cryogenic temperature performance of traveling wave ultrasonic motor

    Publication Year: 2010, Page(s):26 - 31
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (902 KB) | HTML iconHTML

    Through testing investigation and theoretical analysis, the performance change of a traveling wave ultrasonic motor is studied at cryogenic temperature. An experimental system was built up, and the motor's characteristics were tested at cryogenic conditions. The influence of temperature on the friction interface was studied by comparing the material's surface appearances. This paper provides some ... View full abstract»

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  • The effect of the size of piezoelectric element on shear stress at the interreface of deicing system

    Publication Year: 2010, Page(s):32 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (373 KB)

    For the reason of flight conditions (altitude, high humidity), the helicopter is more susceptible to icing conditions than other fixed-wing aircraft. To meet the requirements of the helicopter flying in all weather, deicing measures must be taken for the blade. There are lots of existing blade deicing methods, electro-thermal is widely used, but the loss of power is very great. With the developmen... View full abstract»

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  • Acoustic character analysis of MEMS ultrasonic device for micro/nano particles separation

    Publication Year: 2010, Page(s):36 - 40
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (406 KB)

    In this paper, the acoustic character of a new MEMS device that can separate micro/nano particles on-chip by the use of bulk-mode excited membrane vibration is analyzed. Two parts of the acoustic field, i.e., the acoustic pressure caused by the membrane vibration and the damping pressure caused by the fluid medium, are studied separately. Firstly, acoustic pressure caused by silicon nitride membra... View full abstract»

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  • Research on the applications of dielectric ceramic in microwave oven

    Publication Year: 2010, Page(s):41 - 45
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1206 KB) | HTML iconHTML

    The attributes of microwave dielectric ceramic have been studied from two aspects: working state and relative dielectric constant. Its four applications in microwave oven are elicited. Ceramics in resonant state can be used in microwave oven of fixed boundary condition; ceramics in detuned state are made into shimming panel; high permittivity ceramics are used to make flexible fast defroster and l... View full abstract»

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  • Investigations on effects of free-stream mach numerber on flow and aeroacoustic characteristics in cavity

    Publication Year: 2010, Page(s):46 - 50
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (363 KB)

    This paper presents effects of free-stream compressibility (Ma) on aeroacoustic characteristics inside different flow-type cavity with length-depth ratios (L/D) of 8, 12 and 15 at Mach numbers of 0.6, 0.9, 1.2, 1.5 and 1.8. The results indicate that free-stream compressibility (Ma) is a key parameter influencing flow type and aeroacoustic characteristics in the cavity. Increase in free-stream comp... View full abstract»

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  • Analysis of a monolithic quartz plate thickness-twist mode acoustic wave filter

    Publication Year: 2010, Page(s):51 - 54
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (489 KB)

    We study thickness-twist vibrations of a rotated Y-cut quartz plate with two pairs of electrodes. One is a known driving voltage. The other is connected to an output circuit. The structure can operate as a filter. Both free and electrically forced vibrations are studied. Resonant frequencies, mode shapes and the related energy trapping, output voltage, input admittance, and input and output powers... View full abstract»

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  • Love wave propagating in a piezoelectric material structure with a mass layer

    Publication Year: 2010, Page(s):55 - 59
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (314 KB)

    An analytical approach is taken to investigate Love wave propagating in layered piezoelectric structure where a thin piezoelectric film with a mass layer bonded to a semi-infinite elastic substrate. The governing equations of Love waves can be obtained on the basis of the linearly piezoelectric theory. The displacements, electric potential, stresses and electric displacement are continuous across ... View full abstract»

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  • Multi-channel waveguides based on two dimensional phononic crystals

    Publication Year: 2010, Page(s):60 - 63
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (434 KB) | HTML iconHTML

    Using supercell plane wave method, we investigated defect modes created by introducing two types of defect with multi-branch in a two dimensional acoustic band-gap material consisting of water cylinders in mercury background. The defect is made up of the water cylinders with different size, and the size of the defect cylinders are shown to strongly influence the defect modes existing in the freque... View full abstract»

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  • Fast washing micro-reactor on piezoelectric substrate based on surface acoustic wave

    Publication Year: 2010, Page(s):64 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (626 KB) | HTML iconHTML

    Residual contamination in micro-reactor is usually a source of errors for micro-fluidic biochemical analysis system. A new method for fast washing micro-reactor has been proposed. An interdigital transducer with 27.7MHz center frequency and a reflecting gate have been fabricated on 128° YX-LiNbO3 substrate. A micro-reactor is on the propagation path of the piezoelectric substrate... View full abstract»

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  • Generation of droplets for lab-on-a-piezoelectric-substrate utilizing surface acoustic wave

    Publication Year: 2010, Page(s):68 - 71
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB) | HTML iconHTML

    The generation of droplet is indispensable for micro-fluidic device. A new method for generation of droplet was proposed. An interdigital transducer and reflector were fabricated on a 128°yx-LiNbO3 substrate. A PDMS micro-channel with back taper shape was used to connect a syringe and a needle with sub-micron inside diameter, which was supported by arc PDMS. The tip of the needle... View full abstract»

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  • Friction and wear test device of linear ultrasonic motor and experimental studies

    Publication Year: 2010, Page(s):72 - 77
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1587 KB)

    Linear ultrasonic motors are known for their various advantages such as direct actuating, stepping and servo working, as well as excellent controllable performance. Hence, linear ultrasonic motors are becoming increasingly important in the studying field of ultrasonic motors around the world. As the output characteristics of ultrasonic motors are directly influenced by the friction characteristic ... View full abstract»

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