2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications最新文献_第8页

A spatial impulse response based model for the acoustic field in detection of buried objects with low frequency WAVES 基于空间脉冲响应的低频波地埋物探测声场模型

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775749

Hui-feng Xu, Y. Qian

引用次数: 0

Application research on NAH for identification of plant sound source na在植物声源识别中的应用研究

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775775

Xiuqing Wang, Shifeng Yang, Ji-min Zhao, Jian-ying Guo

引用次数: 0

Structures and vibration analysis of film bulk acoustic wave resonators 薄膜体声波谐振器的结构与振动分析

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775753

Ji Wang, Jian-song Liu, Jianke Du, Dejin Huang

{"title":"Structures and vibration analysis of film bulk acoustic wave resonators","authors":"Ji Wang, Jian-song Liu, Jianke Du, Dejin Huang","doi":"10.1109/SPAWDA.2008.4775753","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775753","url":null,"abstract":"The wireless communication technology demands for smaller size, high frequency, high performance, low energy consumption, and low cost RF components. Current products based on dielectric or SAW resonators are not enough either due to the size or the circuit loss. Film bulk acoustic resonators (FBAR) are the latest technology offering small size and high frequency RF components to the fast growing personal wireless communication technology. We reviewed the current state-of-art of the FBAR technology and explained the working mechanism of FBAR. With two major vibration models, thickness-extension and thickness-shear, we also described the FBAR structure and principle of material selection. Furthermore, we analyzed the effect of electrodes on the vibration frequency, and explained the choice of quarter wavelength reflectors in the SMR. We want to provide essential concepts and knowledge about FBAR technology to engineers who are interested in studying it further. With enough knowledge on the vibration models and materials, the design method of FBAR and SMAR can be established with accurate analysis.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122690655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The plane waves in pyroelectric medium 热释电介质中的平面波

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775767

Xiaoguang Yuan

{"title":"The plane waves in pyroelectric medium","authors":"Xiaoguang Yuan","doi":"10.1109/SPAWDA.2008.4775767","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775767","url":null,"abstract":"The propagation of waves in an infinite pyroelectric medium is studied in this paper. The governing equations for the pyroelectrics are written in the compact algebraic form. Four characteristic wave velocities are found, three being analogous to those of elastic waves and the fourth wave, which is predominantly a temperature disturbance, corresponding to the heat pulse known as the second sound. From computing example for BiTiO3 it is found that all the velocities and attenuation coefficients are related to the wave normal and the material constants. The effect of the electric properties on the wave propagation is considered, which indicates that the temperature wave is not sensitive to pyroelectricity and piezoelectricity in the discussed case. The effects of the terms containing relaxation time on the attenuation are researched in detail in one-dimensional case, where 11 cases are discussed. It is found that larger relaxation time affects the wave more; the electric relaxation could be ignored in real situation, while the elastic relaxation and heat inertia are considerable; the heat inertia term can amplify the mechanical wave and its role is opposite to the elastic and pyroelectric damping terms.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125334486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Generation and rotation of a single water droplet by hypodermic needle in ultrasonic vibration 超声振动中单个水滴由皮下注射针产生和旋转

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775795

Jun-hui Hu, Z. Tan, S. Teo

引用次数: 0

Study and simulation on performance of IDEs 1–3 mode piezoelectric fiber sensor IDEs - 1模压电光纤传感器性能的研究与仿真

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775860

Ying Luo, Li-hua Zhang, Xiu-xin Jiang, Xiang Yan

引用次数: 0

Design and analysis of a cylindrical standing wave ultrasonic motor using cantilever and sandwich type transducers 采用悬臂和夹层换能器的圆柱形驻波超声电机设计与分析

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775786

Yingxiang Liu, Weishan Chen, Jun-kao Liu, S. Shi

{"title":"Design and analysis of a cylindrical standing wave ultrasonic motor using cantilever and sandwich type transducers","authors":"Yingxiang Liu, Weishan Chen, Jun-kao Liu, S. Shi","doi":"10.1109/SPAWDA.2008.4775786","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775786","url":null,"abstract":"A cylindrical standing wave ultrasonic motor using cantilever and sandwich type transducers was proposed in this paper. There are four pairs of cantilevers outside the cylindrical stator, and four PZT ceramics are set between each pair of cantilevers. The PZT ceramics together with a pair of cantilevers compose a longitudinal transducer. The bending mode of cylindrical stator is excited by the longitudinal vibration of PZT ceramics. Thus, linear simple harmonic motions are achieved at the particle on the teeth. And the frictional force between rotor and stator is the driving force to realize the rotational motion of rotor. The PZT ceramics work with d33 mode, which have high electromechanical coupling efficiency and could improve the output characteristics. The working principle of proposed motor was analyzed. The cylinder and longitudinal transducer were designed with FEM. The sensitive parameters of resonant frequency of transducers and cylinder were gained with modal analysis. The longitudinal resonant frequency of transducers and bending resonant frequency of cylinder were degenerated, and the motion trajectories of nodes on the teeth were analyzed. The results of this study could be useful in the development of this new type of ultrasonic motor.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126595750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Analysis method of mixed mode crack in 2D finite piezoelectric media 二维有限压电介质混合模态裂纹分析方法

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775774

C. Fan, GuangTao Xu, M. Zhao

{"title":"Analysis method of mixed mode crack in 2D finite piezoelectric media","authors":"C. Fan, GuangTao Xu, M. Zhao","doi":"10.1109/SPAWDA.2008.4775774","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775774","url":null,"abstract":"In this paper, the Hybrid Extended Displacement Discontinuity-Charge Simulation Method (HEDD-CSM) [1] is used to study the mixed mode cracks in two-dimensional finite piezoelectric media under combined mechanical-electrical loadings. The HEDD-CSM combines the extended displacement discontinuity method (EDDM) and the charge simulation method (CSM). The solution for an electrically impermeable crack is approximately expressed by a linear combination of fundamental solutions of the governing equations which includes the extended point force fundamental solutions with the sources placed at chosen points outside the domain of the problem under consideration and the extended Crouch fundamental solutions with the extended displacement discontinuities placed on the crack. The coefficients of the fundamental solutions are determined by letting the approximated solution satisfy the conditions on the boundary of the domain and on the crack face. The center cracks in piezoelectric strips are analyzed by HEDD-CSM. The stress intensity factors and the electric displacement intensity factor are calculated. Meanwhile the effect of finite domain size on these intensity factors is studied. One of the most interesting findings is that the intensity factor KII decouples from K1 and KD even in a finite piezoelectric medium.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131753866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of 40 kHz receiving piezoelectric micro-machined ultrasonic transducers 40 kHz接收型压电微机械超声换能器的研制

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775814

Meng-jiao Wang, Zhen-hong Hao, D. Qiao

引用次数: 0

Simulating frequency-dependent dissipation in the CARI technique for breast tumors using the modified Szabo's wave model 利用改进的Szabo波模型模拟乳腺肿瘤CARI技术中频率相关耗散

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775764

Xiaodi Zhang, Wen Chen, Xing Cai

引用次数: 0