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2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)最新文献

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Theoretical Analysis of Temperature Field and Thermoelectric Efficiency of Cylindrical Thermoelectric Generators 圆柱形热电发生器温度场及热电效率的理论分析
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019314
Zhiyao Cheng, W. Niu, Xiaoshan Cao
{"title":"Theoretical Analysis of Temperature Field and Thermoelectric Efficiency of Cylindrical Thermoelectric Generators","authors":"Zhiyao Cheng, W. Niu, Xiaoshan Cao","doi":"10.1109/SPAWDA48812.2019.9019314","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019314","url":null,"abstract":"The aim of this study was to determine the temperature field distribution and variation law of the thermoelectric efficiency of annular thermoelectric generators. To find those factors, we established thermoelectric equation in a cylindrical coordinate system. This paper shows that the maximum thermoelectric efficiency of a thermoelectric device is independent of its geometry but is dependent on its material parameters and boundary temperature. Given a certain current density, if the temperature difference changes, for example, if the temperature at the hot end rises, in structures of the same inner diameter, as the thickness increases, the thermoelectric efficiency first decreases and then increases. This theoretical analysis could provide guidance for designing cylindrical thermoelectric generators.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128658147","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
Research on Polygonal Piezoelectric Composite Transducer 多边形压电复合换能器的研究
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019260
Linchun Zhong, Kai Zhang, Gang Hua Liu
{"title":"Research on Polygonal Piezoelectric Composite Transducer","authors":"Linchun Zhong, Kai Zhang, Gang Hua Liu","doi":"10.1109/SPAWDA48812.2019.9019260","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019260","url":null,"abstract":"The fabrication methods of triangular and hexagonal piezoelectric composites are introduced. and combined with the parameters of specific materials, the underwater acoustic transducers were designed and manufactured respectively. Their performances are tested and analyzed. At the same time, the matching layer material is added to the surface of piezoelectric composites to widen the working bandwidth of the transducers.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128422054","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
Scattering of SH-Wave by Trapezoidal Hill and Subsurface Cavity 梯形山和地下空腔对sh波的散射
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019325
Yuan-rui Xu, Yun-qiu Song, Guan-xi-xi Jiang, Xin-zhu Li, Zai-lin Yang
{"title":"Scattering of SH-Wave by Trapezoidal Hill and Subsurface Cavity","authors":"Yuan-rui Xu, Yun-qiu Song, Guan-xi-xi Jiang, Xin-zhu Li, Zai-lin Yang","doi":"10.1109/SPAWDA48812.2019.9019325","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019325","url":null,"abstract":"Combining with a new theory of region segmentation, the wave field of SH wave in trapezoidal convex terrain with circular holes is obtained by complex variable function method. By solving the boundary conditions, the surface displacement amplitude expression of the model is obtained. Numerical calculations show that the incident wave angle, wave number and hole radius have a significant influence on the trapezoidal convex topography.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127514439","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
Surface Motion of Inhomogeneous Right-Angle Space with a Circular Canyon under SH Wave SH波作用下圆形峡谷非均匀直角空间的表面运动
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019280
Xin-zhu Li, Yun-qiu Song, Guan-xi-xi Jiang, Yong Yang, Zai-lin Yang
{"title":"Surface Motion of Inhomogeneous Right-Angle Space with a Circular Canyon under SH Wave","authors":"Xin-zhu Li, Yun-qiu Song, Guan-xi-xi Jiang, Yong Yang, Zai-lin Yang","doi":"10.1109/SPAWDA48812.2019.9019280","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019280","url":null,"abstract":"In this paper, complex function method and conformal mapping technique are used to present the closed-form solution for scattering of SH wave induced by a circular canyon in a density of radial inhomogeneous right-angle space. By normalizing the Helmholtz equation, the expressions of wave fields and corresponding stresses are deduced. Applying the boundary condition at the canyon, the undetermined coefficients in scattering waves are solved, the entire displacement in the half space is obtained subsequently.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125861922","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
Simulation of Nonlinear Rayleigh Waves Propagation in Cracked Layered Elastic Medium 非线性瑞利波在裂隙层状弹性介质中的传播模拟
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019264
L. Jia, Yan Guo, Juan Huang, Bi-xing Zhang
{"title":"Simulation of Nonlinear Rayleigh Waves Propagation in Cracked Layered Elastic Medium","authors":"L. Jia, Yan Guo, Juan Huang, Bi-xing Zhang","doi":"10.1109/SPAWDA48812.2019.9019264","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019264","url":null,"abstract":"The nonlinear Rayleigh waves in layered half space with micro-cracks are analyzed by using finite element method. The micro-cracks close or open under the traction of Rayleigh waves. This leads that the second harmonic of Rayleigh waves can be observed after interacting with micro-cracks. For micro-cracks near the surface of structures, the second harmonics can be obtained from Rayleigh waves modes passing through micro-cracks. However, for micro-cracks in the low-velocity interlayer, the second harmonics can be obtained only when the Rayleigh waves modes at low frequency interact with micro-cracks. Besides, the level of the nonlinear effect is influenced by the length and width of micro-cracks.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"2 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125917767","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
Local Enhanced Acoustic Traps based on Vibrations of Microtpillar Arrays 基于微柱阵列振动的局部增强声阱
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019259
Hui Shen, Kang-dong Zhao, Zhiweng Wang, Xiao-long Lu
{"title":"Local Enhanced Acoustic Traps based on Vibrations of Microtpillar Arrays","authors":"Hui Shen, Kang-dong Zhao, Zhiweng Wang, Xiao-long Lu","doi":"10.1109/SPAWDA48812.2019.9019259","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019259","url":null,"abstract":"Controllable manipulation in nano-/microscale holds considerable promise for bioengineering, intracellular manipulation, diagnostic sensing and biomedical applications. In particular, reproductive manipulation and customized structure is quite essential for micro-/nanomachines to accomplish a variety of on-demand tasks at small scales. Here, we present an attractive strategy to collect microparticles, based on local acoustic forces from the vibrations of nearby microstructure. The micro-manipulation chip is built based on enhanced acoustic field which could tightly trap microparticles to the boundaries of microstructure by tuning the applied driving frequency and voltage. Experimental demonstrations illustrate that the capturing and operation of microparticles is closely related to the size of particles, due to the vibration-induced locally enhanced acoustic field and resultant propulsion force. This acoustic manipulation strategy can open extensive opportunities for lab-on-chip systems, microfactories and micro-manipulators, etc.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114438188","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
Numerical Simulation on Thermoelectric Performance and Thermal Stresses of A Segmented Annular Thermoelectric Generator 分段环形热电发生器热电性能及热应力的数值模拟
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019321
Yan Sun, Zhen-fei Wen, A. Zhang, Ji Wang
{"title":"Numerical Simulation on Thermoelectric Performance and Thermal Stresses of A Segmented Annular Thermoelectric Generator","authors":"Yan Sun, Zhen-fei Wen, A. Zhang, Ji Wang","doi":"10.1109/SPAWDA48812.2019.9019321","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019321","url":null,"abstract":"In this paper, a three-dimensional finite element model of the segmented annular thermoelectric generator (SATEG) is established, and effects of geometric configuration on the thermoelectric performance and mechanical reliability of the SATEG are studied.The optimized external resistances and geometric configuration for the maximum output power and maximum conversion efficiency are calculated by using the presented model, and properties of thermoelectric material are assumed to be temperature-dependent. Numerical results show that the output power and efficiency of SATEG decrease with the increasing values of the length and angle ratio of thermoelectric leg. The output power of CoSb3-based annular thermoelectric generator (ATEG) is higher than that of SATEG when the corresponding optimum external resistances are matched. In addition, the maximum von Mises stresses in the SATEG can be reduced by increasing the length of thermoelectric leg. This study will be helpful for the optimization design of SATEG devices.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126914970","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
A novel rail-type piezoelectric robot for Tokamak maintenance operation 一种用于托卡马克维修作业的新型导轨式压电机器人
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019236
Bo Hao, Liang Wang, Ruifeng Wang, Haonan Feng, Xin Wang, Jiamei Jin, Chun-sheng Zhao
{"title":"A novel rail-type piezoelectric robot for Tokamak maintenance operation","authors":"Bo Hao, Liang Wang, Ruifeng Wang, Haonan Feng, Xin Wang, Jiamei Jin, Chun-sheng Zhao","doi":"10.1109/SPAWDA48812.2019.9019236","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019236","url":null,"abstract":"A novel rail-type piezoelectric robot is proposed in this study, presenting the potential application for the maintenance operation of the Tokamak vacuum chamber. Four straight beams adhered with piezoelectric ceramics form a rectangular frame of the robot. Two-phase bending vibrations with a spatial phase difference of 90° are excited in the two shorter beams respectively, leading tomicroscopic elliptical motions at the driving feet. Therefore, the robot can move in the straight rail utilizing friction. Finite element analysis was carried out to verify the operation principle and to optimize the dimensions of the robot. A prototype of the robot with a mass of 83.8 g was fabricated, assembled and tested. With a driving voltage of 300 Vpp, the maximum velocities in two directions are 92.4 mm/s and 196.5 mm/s respectively. With an excitation voltage of 400 Vpp, the maximum load capacity of the prototype is 200 g.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125724087","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
Image Correction for Transcranial Plane Wave Imaging 经颅平面波成像的图像校正
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019275
Ya-long Song, C. Su, Wei-jun Lin
{"title":"Image Correction for Transcranial Plane Wave Imaging","authors":"Ya-long Song, C. Su, Wei-jun Lin","doi":"10.1109/SPAWDA48812.2019.9019275","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019275","url":null,"abstract":"In order to study the influence of skull on transcranial ultrasound imaging, we use linear acoustic equation and finite difference method to simulate the transcranial ultrasound field without skull and with skull respectively. The acoustic field is generated by a linear array with 64 elements and central frequency of 2.4MHz. Because of the difference between acoustic parameters of skull and those of surrounding tissues, the image with the skull in the model is seriously distorted, which has imaging target positions shifted, low imaging brightness, low contrast and low resolution, comparing to the image without the skull in the model. Therefore, this paper proposes a corrective method of received signal phase. The results show that after the delay compensation, the positions of the imaging targets are reset to the correct positions, and the image brightness, contrast and resolution are significantly improved.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"207 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134088034","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
Simulation of Janus Transducer Driven by Flexural Beam 弯曲梁驱动Janus换能器的仿真
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019272
Guang-wei Wu, Xi-ping Mo, Yong Chai, Yong-ping Liu
{"title":"Simulation of Janus Transducer Driven by Flexural Beam","authors":"Guang-wei Wu, Xi-ping Mo, Yong Chai, Yong-ping Liu","doi":"10.1109/SPAWDA48812.2019.9019272","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019272","url":null,"abstract":"A compact Janus transducer driven by flexural beam is presented in this paper. It could reduce the resonance frequency of transducer by using the flexural mode of the beam, and achieve medium sound power and wide band acoustic radiation performance. Using the finite element method (FEM), the optimization of electroacoustic parameters such as transmitting voltage response (TVR) is carried out. It is shown that the TVR of transducer could be improved effectively by adjusting the position of the beam and the material of the flexural beam and head mass, and the working bandwidth would also be expanded because the first order and second order modes could be coupled efficiently. The working modes of the optimized transducer are studied. The first and second resonance frequencies of the transducer are 1.1 kHz and 2.5 kHz respectively. The maximum TVR is greater than 125dB. The directivity pattern of the transducer is also studied. It is shown that the sound field of the transducer is similar to the superposed radiation of two in-phase spheres. This transducer could be used for oceanographic applications as well as underwater communication.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"545 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133918521","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
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