2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications最新文献_第5页

Actuating characteristic of laminated PVDF actuators used on a beam with large deformation PVDF层压作动器在大变形梁上的作动特性

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775793

Ya-hong Zhang, S. Xie, Xi-nong Zhang

{"title":"Actuating characteristic of laminated PVDF actuators used on a beam with large deformation","authors":"Ya-hong Zhang, S. Xie, Xi-nong Zhang","doi":"10.1109/SPAWDA.2008.4775793","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775793","url":null,"abstract":"Actuating characteristic of laminated PVDF actuator (LPA) partially covered on a beam is studied in this paper. Considering large deformation of the beam, coupled dynamic equations of the system are derived based on Hamilton principle. The formulas of nonlinear actuating forces are obtained and the parametric study is then conducted to evaluate the effects of geometric and physical properties of the actuator on its actuating forces. For a cantilever beam, the influences of the deformation, LPA location and PVDF layer number are discussed. The results show that the nonlinear deformation has no effect on the axial actuating force, but it induces pronounced actuating force in the transverse direction. The nonlinear actuating force is inversely proportional to the radius of local curvature, and it is linear with the number of LPA's layers. The linear actuating force is the second-order polynomial function of the layer number. For a cantilever beam, the optimized location of the LPA is the fixed end for linear deformation. Whereas, the optimized position of the LPA is tip of the beam when large deformation occurred and the control force is afforded by nonlinear actuating force in the transverse direction.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"26 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":"122508650","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: 2

Reverberation-ray analysis of orthotropic piezoelectric laminates with imperfect interfaces 具有非完美界面的正交各向异性压电层合板的混响射线分析

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775745

Yun-ying Zhou, Wei-qiu Chen, Chao-feng Lu

引用次数: 0

A new type of ultrasonic gas flowmeter with multi-tracks 一种新型多径超声气体流量计

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775817

Y. Ben, Zhong-ning Zhang, Shu-Yi Zhang

{"title":"A new type of ultrasonic gas flowmeter with multi-tracks","authors":"Y. Ben, Zhong-ning Zhang, Shu-Yi Zhang","doi":"10.1109/SPAWDA.2008.4775817","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775817","url":null,"abstract":"In general, two major factors effect on the measurement precision of ultrasonic transit-time gas flowmeter: the calculations of gas velocity distribution in the pipe and the measurements of the transit time of ultrasonic transmitting from one transducer to another. In this paper, considering the affect factors, a new design of ultrasonic gas flow meter is proposed, which is operated by a master slave control based on a single board computer and a MCU. In order to calculate the velocity distribution in the whole pipe, the multi-tracks (5 tracks) are used to measure the transit times of ultrasonic waves between each pair of the corresponding transducers located at five different profiles of the pipe, by which the gas velocity near the pipe wall can be described more accurately, especially at a low gas velocity. Meanwhile, the ultrasonic beam deflection altered with the change of the gas velocity is modified by software in order to improve the accuracy of time interval. In addition, the peak value transmission circuit is employed to optimize the self-adaptive ability of the system, which can also raise the SNR and reduce the measurement error resulting from the ultrasonic beam deflection. At last, this work proposed a new algorithm for flow calculation based on the improvements mentioned above. These results show that the method has better accuracy, rangeability, stability and repeatability compared to traditional ones.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"36 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":"121390869","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: 2

Magnetoelectric response analysis of the piezoelectric/piezomagnetic thin-film heterostructure derived by low energy cluster beam deposition 低能簇束沉积压电/压磁薄膜异质结构的磁电响应分析

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775748

Shifeng Zhao, C. Yao, Meng-liang Yao, Yuewen Mu, J. Wan, Guang-hou Wang

引用次数: 2

An efficient approach to optimize the vibration mode of ultrasonic motors 一种优化超声电机振动模式的有效方法

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775856

Hua Zhu, Jiantao Zhang, Chunsheng Zhao

引用次数: 0

Finite-difference simulation of rayleigh wave scattering at a surface crack with experimental verification 表面裂纹中瑞利波散射的有限差分模拟及实验验证

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775833

Chao Lu, Zai-dong Zhang

{"title":"Finite-difference simulation of rayleigh wave scattering at a surface crack with experimental verification","authors":"Chao Lu, Zai-dong Zhang","doi":"10.1109/SPAWDA.2008.4775833","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775833","url":null,"abstract":"This paper describes a three-dimension finite-difference method to simulate the interaction of surface acoustic waves with finite-size, surface-breaking, and semi-circular cracks in steel specimen. The simulation is used to predict time-domain history of field displacements vertical to the surface of the steel specimen. We focus on the behavior of the reflection and transmission coefficient of the Rayleigh waves from such cracks in the far field of the crack, when the crack depth is comparable to the wavelength of the interrogating surface wave. The theoretical, finite-difference, and experimental results presented are in very good agreement over the range were the crack depth is much smaller or much larger compared to the wavelength of the incident Rayleigh wave. In the transition regime, between these two limiting cases, only the finite-difference and experimental data show good agreement since the theoretical predictions are no longer applicable. Furthermore, based on the finite-difference simulation and the laser interferometric measurement, the transmission coefficient of the surface wave scattering from the small surface crack was presented.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"30 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":"116297959","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

Design and analysis of a cylindrical ultrasonic motor using bending transducer 弯曲换能器圆柱形超声电机的设计与分析

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775785

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

{"title":"Design and analysis of a cylindrical ultrasonic motor using bending transducer","authors":"Weishan Chen, Yingxiang Liu, Jun-kao Liu, S. Shi","doi":"10.1109/SPAWDA.2008.4775785","DOIUrl":"https://doi.org/10.1109/SPAWDA.2008.4775785","url":null,"abstract":"A cylindrical ultrasonic motor using bending transducer was proposed in this paper. The stator components of proposed motor contain a cylinder and four bending transducers, and the four uniform bending transducers are set on the exterior surface of cylinder. The bending of transducers is excited by the longitudinal vibration of PZT ceramics. The four transducers are excited with two different groups of signal, and two bending vibrations are generated on the cylinder. When the amplitude of two bending vibrations is equal, and their phase difference on time and space is pi/2, a traveling wave is formed on the cylinder. Thus, an elliptical motion is achieved at the particle on the tooth. And the frictional force between rotor and stator is the driving force to realize the rotation 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 transducers were designed with FEM. The sensitive parameters of resonance frequency of transducer and cylinder were gained with modal analysis. The bending resonance frequency of transducers and cylinder were degenerated, and the motion trajectories of nodes on the teeth were analyzed. The result of transient analysis shows that the trajectory of node on the tooth is nearly an ellipse. The results of this paper could be useful in the development of this new type of motor.","PeriodicalId":190941,"journal":{"name":"2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications","volume":"127 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":"114660027","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

Development of quartz tuning fork temperature sensors 石英音叉温度传感器的研制

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775829

Jun Xu, B. You, Xueqiong Zhao, Xin Li

引用次数: 2

A simple pre-stress estimating method of langevin transducers 一种简单的朗格万传感器预应力估计方法

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775801

B. Fu, Tinglong Li, T. Hemsel

引用次数: 2

Study of Love-mode immunosensors based on ZnO/36°YX-LiTaO3 structures 基于ZnO/36°YX-LiTaO3结构的Love-mode免疫传感器研究

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2008-12-01 DOI: 10.1109/SPAWDA.2008.4775789

Feng-mei Zhou, Zhe Li, L. Fan, Xun Gong, Shu-Yi Zhang

引用次数: 0