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2012全国压电和声波理论及器件技术研讨会

作者： De-sheng CHEN Xiao-di HUANG Hai-bin WANG Lei JIANG Institute of Acoustics Chinese Academy of Sciences

The phase generated carrier(PGC) modulation-demodulation technique is the main demodulation technique for fiber interferometric *** are two methods to realize PGC *** method is inner modulation,and the other is external ***,there is less study on the PGC external modulation than the PGC inner *** this paper,we focus on the PGC external modulation to analyze its *** experiment results indicate that the external demodulation performs ***,its cost is much lower than that of inner modulation.

关键词： PZT PGC Modulation Fiber Sensor

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FREE VIBRATION OF FIXED SUPPORTED AND MULTILAYERED MAGNETO-ELECTRO-ELASTIC PLATES

FREE VIBRATION OF FIXED SUPPORTED AND MULTILAYERED MAGNETO-E...

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2012全国压电和声波理论及器件技术研讨会

作者： Li-bo XIN Zhen-dong HU School of Aerospace Engineering and Applied Mechanics Tongji University

Semi-analytical finite element method is applied to study the free vibration of multilayered,anisotropic magneto-electro-elastic plates.A series solution is assumed in the plane to satisfy the fixed boundary *** finite element procedure is adopted across the thickness of the *** the finite element model is derived based on the constitutive equation of magneto-electro-elastic *** components,electric potential and magnetic potential is taken as the nodal degree of *** numerical results are compared with the solutions in *** influence of magnetic-electro-elastic properties are studied.

关键词： Finite element method Magneto-electro-elastic plate Free vibration Multilayered

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PROPAGATION OF BLEUSTEIN-GULYAEV WAVE IN A PIEZOELECTRIC CRYSTAL IN CONTACT WITH VISCOUS CONDUCTIVE LIQUIDS

PROPAGATION OF BLEUSTEIN-GULYAEV WAVE IN A PIEZOELECTRIC CRY...

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2012全国压电和声波理论及器件技术研讨会

作者： Feng-lin GUO Guo-qing WANG Department of Engineering Mechanics Shanghai Jiaotong University

In this work we studied propagation of B-G wave in a piezoelectric crystal of hexagonal symmetry in contact with viscous conductive *** dispersion relations are derived for both the metallized and exact electrical solid/liquid interface *** is found that acoustoelectric coupling and viscosity significantly affect acoustic wave propagation properties at a solid/liquid *** study provides essential data and theoretical foundation for the design and development of liquid phase sensors and biosensors.

关键词： Bleustein-Gulyaev wave Liquid sensing Acoustoelectric coupling Dispersion relations

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PIEZOMAGNETIC LOVE WAVES ON ORTHORTROPIC PIEZOELECTRIC HALF-SPACES

PIEZOMAGNETIC LOVE WAVES ON ORTHORTROPIC PIEZOELECTRIC HALF-...

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2012全国压电和声波理论及器件技术研讨会

作者： Yan-ping KONG Ruo-meng TIAN Jin-xi LIU Institute of Engineering Mechanics Beijing Jiaotong University Department of Engineering Mechanics Shijiazhuang Tiedao University

This paper investigates Love waves propagating in the layered plate structure consisting of a piezomagnetic layer and an orthotropic piezoelectric half *** Love waves can propagate in the resulting structure and the dispersion relations of the Love waves are *** the case of a Terfenol-D layer over a KNbO substrate,the wave exists at any rotated *** results showed that the phase velocity dependent on the cutting angle and the speed of these waves is sensitive to the rotated cutting *** conclusions have important role for designing resonators,filters and SAW devices.

关键词： Piezomagnetic material Orthotropic Piezoelectric material Love wave Dispersion

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EXPERIMENTAL INVESTIGATION OF CHARACTERISTICS OF CHLADNI EFFECT

EXPERIMENTAL INVESTIGATION OF CHARACTERISTICS OF CHLADNI EFF...

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2012全国压电和声波理论及器件技术研讨会

作者： Xiao-bo ZHU Jun-hui HU State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics & Astronautics

In this work,characteristics of Chladni effect around a nodal point on a metal plate vibrating flexurally are experimentally *** eggs with 440 μm diameter approximately are used as the particles for *** locus of particle clusters moving to the nodal point,and dependence of the average radial velocity of particle clusters on the vibration displacement of metal plate,particle number in a cluster,and initial radial position of particle clusters,are measured and analyzed.

关键词： Chladni effect Nodal point Particle Average radial velocity

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OVENTONE-MODE LIMITS ON AT-CUT FUNDAMENTAL CRYSTAL RESONATOR,THROUGH TWICE PLATING METHOD

OVENTONE-MODE LIMITS ON AT-CUT FUNDAMENTAL CRYSTAL RESONATOR...

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2012全国压电和声波理论及器件技术研讨会

作者： Lin-lin ZHANG Beijing Chenjing Electronics co. Ltd

This paper introduces a method to limit overtone-mode on AT-Cut fundamental mode crystal *** to the energy trapping theory,twice plating method is employed to increase the mass of the main *** key design parameters are the diameter and thickness of the mass loading,which are determined so that the maximum ratio of the equivalent resistance at the overtone mode to that at the fundamental mode may be *** results in 4 MHz AT-Cut fundamental mode resonator show that the equivalent resistance of the fundamental mode is less than 30 ohm while the third-order overtone mode achieved a resistance of more than 150 ohm.

关键词： Energy trapping theory Twice plating Mass loading

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“2010年全国压电和声波理论及器件技术研讨会”征文

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科技导报 2010年第19期28卷 58-58页

中国力学学会、中国声学学会将于2010年12月10—13日召开＂2010年全国压电和声波理论及器件技术研讨会＂。征文内容：压电理论（包括微纳米压电理论）;声波理论（表面波、体波等）;压电器件设计与分析（谐振器、传感器、换能器、MEMS／N... 详细信息

中国力学学会、中国声学学会将于2010年12月10—13日召开＂2010年全国压电和声波理论及器件技术研讨会＂。征文内容：压电理论（包括微纳米压电理论）;声波理论（表面波、体波等）;压电器件设计与分析（谐振器、传感器、换能器、MEMS／NEMS／Nano压电器件等）;压电材料（陶瓷、晶体、薄膜、微纳米等压电材料）.

关键词：压电理论技术研讨会器件设计征文内容声波中国力学学会中国声学学会压电材料

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RESEARCH ON DRIVING POWER FOR DUAL-DRIVE FOOT PIEZOELECTRIC LINEAR MOTOR WITH DUAL-DRIVE FEET

RESEARCH ON DRIVING POWER FOR DUAL-DRIVE FOOT PIEZOELECTRIC ...

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2012全国压电和声波理论及器件技术研讨会

作者： Guan-yin YU Wei-qing HUANG Wei-hua LIU Song PAN State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics

The design of a new driver based on Programmable System on Chip(PSOC3) is *** to the requirements of piezoelectric linear motor.a signal generator providing 4-phase sin wave voltage signal with 90° phase difference is *** embedded chip is used as the main processor,and the DMA data transmission technique is adopted to increase the efficiency of the main *** operation buffer and linear power amplifier circuit is designed and the amplitude-frequency characteristics are *** experimental and analytical results demonstrate that the driver is reliable for the piezoelectric linear motor with long-time stability and the alternation operation of the promoter.

关键词： Piezoelectric linear motor Alternate drive Direct memory access Linear amplifier

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DEPTH PROFILING OF COATING BY LASER ULTRASONIC TECHNIQUE

DEPTH PROFILING OF COATING BY LASER ULTRASONIC TECHNIQUE

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2012全国压电和声波理论及器件技术研讨会

作者： Xue-hang SONG Yong-dong PAN Zheng ZHONG Kao-shan DAI School of Aerospace Engineering and Applied Mechanics Tongji University School of Civil Engineering Tongji University

Functionally graded materials(FGMs) show great potential,and the development of new FGMs will lead to materials that have properties not achievable with homogeneous *** dispersion curves of surface acoustic wave propagating in coating structures are investigated using the reflection and transmission coefficient ***'s found that the dispersion curves are sensitive to the transverse wave velocity,but they are not very sensitive to the longitudinal wave velocity and *** algorithms adopted to handle the inverse *** object function is established based on experimental phase velocity and the theoretical *** reconstructed depth-profiling of material properties agrees well with the experimental ones.

关键词： Coating Laser ultrasonics Inverse problem Genetic algorithm

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MEASUREMENT OF THE ACOUSTIC CHARACTERISTICS OF ULTRASONIC PHASED ARRAY TRANSDUCER

MEASUREMENT OF THE ACOUSTIC CHARACTERISTICS OF ULTRASONIC PH...

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2012全国压电和声波理论及器件技术研讨会

作者： Chun-guang XU Ming-kai DENG Ding-guo XIAO Liu Yang Hui-ling REN School of mechanical engineering Beijing Institute of Technology Key laboratory of fundamental science for advanced machining Beijing Institute of Technology

Acoustic field characteristic is a key factor of the ultrasonic transducer and many acoustic field measuring methods have been ***,nowadays hydrophone method which used to measure the acoustical field characteristic of ultrasonic transducer has been wildly used and *** paper introduces an advanced measuring method to get the acoustic field characteristic of the phased array transducer by means of using hydrophone.A new acoustical field scanning method and a synchronization guarantee technique will be *** experiments have been performed and some interesting phenomena have been *** these phenomena have been analyzed and some conclusions have been infered.

关键词： Ultrasonic phased array transducer Acoustical field characteristic Hydrophone Measurement system

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