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

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Acoustic Levitation Characteristics of Hexagon Ultrasonic Arrays and Their Manipulate Methods 六边形超声阵列的声悬浮特性及其操纵方法
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019249
Jiong-jiong Hu, Ying Yang, Jianmin Qiu, Wenxiang Yu
{"title":"Acoustic Levitation Characteristics of Hexagon Ultrasonic Arrays and Their Manipulate Methods","authors":"Jiong-jiong Hu, Ying Yang, Jianmin Qiu, Wenxiang Yu","doi":"10.1109/SPAWDA48812.2019.9019249","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019249","url":null,"abstract":"Base on the acoustic levitation technology, concept of contactless transport could be achieved by assembling transducersarray which charged with spatiotemporal modulation of the acoustic field. Our research started with hexagonal-headed ultrasonic transducer design, which was modified by FEM methods to achieve desired amplitude and frequency. A seven sourced hexagonal acoustic array prototype is set to verify the simulation predicted model. Prototype transducers are tested by two-dimensional Doppler vibration system (PSV-300F-B, Polytec co) and precision impedance analyzer (Agilent 9294A), relevant dynamic characteristic parameters are obtained. We verified the suspension and rotation control of the disc by the transducer array through experiments.","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":"134458365","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
An Analysis of in-Plane Free Vibrations of Combinedcurved and Periodic Beams with Rayleigh-Ritzmethod 用瑞利-里兹法分析弯曲与周期组合梁的面内自由振动
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019241
Shu-dong Ding, Yangyang Zhang, Longtao Xie, A. Zhang, Jianke Du, Ji Wang
{"title":"An Analysis of in-Plane Free Vibrations of Combinedcurved and Periodic Beams with Rayleigh-Ritzmethod","authors":"Shu-dong Ding, Yangyang Zhang, Longtao Xie, A. Zhang, Jianke Du, Ji Wang","doi":"10.1109/SPAWDA48812.2019.9019241","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019241","url":null,"abstract":"The curved and periodic beams are frequently used nowadays as essential structural and functional elements with many processes to produce including the popular 3D printing technology.As part of the effort in the analysis of curved and periodic beams, we have studied some special cases of beams with both Euler-Bernoulli and Timoshenko theories.The Rayleigh-Ritz method is used along with extra constraints at each joint, and the analysis now have the combinations of beams considered. By allowing the constraints to be realistic with the actual joint, the accurate frequencies of the combined beam structures are obtained.By further extension of the analytical procedure of curved and periodic beams, we can use the Rayleigh-Ritz method for the analysis of structures of combined beam elements for the evaluation of dynamic properties to satisfy design and application requirements.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"95 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":"133303689","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
Numrical Simulation of Nonlinear Focused Ultrasound 非线性聚焦超声的数值模拟
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019225
De-lin Wu, Lei Yao, Shen-ping Gao, Yudi Pan, Xiao-bo Wang, Lan Gao, Xing-yan Yu
{"title":"Numrical Simulation of Nonlinear Focused Ultrasound","authors":"De-lin Wu, Lei Yao, Shen-ping Gao, Yudi Pan, Xiao-bo Wang, Lan Gao, Xing-yan Yu","doi":"10.1109/SPAWDA48812.2019.9019225","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019225","url":null,"abstract":"Numerical simulation is employed to characterize the sound field of high intensity focused ultrasound, whose results agree well with the analytical results. The sound field in nonlinear case seems to be much more complicated compared with that in linear case. The first three harmonics are extracted from the distorted wave by the zero-phase band-pass filter. It is demonstrated that the amplitude distribution of fundamental wave change little while that of the second and third harmonics vary a lot, as the source pressure increases. And the relative phase almost keep the same in the focal region. It can be concluded that numerical simulation is of great importance in predicting the nonlinear focused sound field at high sound pressure levels.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"39 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":"129562202","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
Fem Simulation of 1-3 Piezoelectric Composites Based on Relaxor Ferroelectric Single Crystals and Their Properties as Underwater Transducers 基于弛豫铁电单晶的1-3压电复合材料及其水下换能器性能的有限元模拟
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019329
Wei Bai, Jia-rong Wang, Xin-ran Xu, Zhen-yu Zheng
{"title":"Fem Simulation of 1-3 Piezoelectric Composites Based on Relaxor Ferroelectric Single Crystals and Their Properties as Underwater Transducers","authors":"Wei Bai, Jia-rong Wang, Xin-ran Xu, Zhen-yu Zheng","doi":"10.1109/SPAWDA48812.2019.9019329","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019329","url":null,"abstract":"In this paper, the performances of 1-3 piezoelectric composites based on a single crystal ferroelectric PIN-PMN-PT as underwater projectors are simulated by finite element method. The harmonic vibration modes and transmitting voltage responses are investigated. The potential advantages and values of single crystal ferroelectrics based composite transducers are presented compared with PZT based composites. The basic principle of designing 1-3 piezoelectric composites for projectors is discussed.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"20 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":"127948750","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
Study on Mechanical-Electrical Response Characteristics of 2-2 Cement-Based Piezoelectric Composites 2-2水泥基压电复合材料的机电响应特性研究
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019250
Pengju Feng, Wen-jie Cheng, Teng Wang, Jiang-ying Chen
{"title":"Study on Mechanical-Electrical Response Characteristics of 2-2 Cement-Based Piezoelectric Composites","authors":"Pengju Feng, Wen-jie Cheng, Teng Wang, Jiang-ying Chen","doi":"10.1109/SPAWDA48812.2019.9019250","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019250","url":null,"abstract":"2-2 cement-based piezoelectric composites were prepared by cutting-casting method. The effects of different loading amplitudes and frequencies on the mechanical-electrical response characteristics of 2-2 cement-based piezoelectric composites were studied by a material testing machine (MTS810). The research shows that the samples have better frequency response under quasi-static loading; the output electrical signal has a good linear relationship with the loading amplitude. The effect of different loading strain rates on the mechanical-electrical response characteristics of 2-2 cement-based piezoelectric composites was studied by a split Hopkinson pressure bar (SHPB) test device. The present work shows that under single impact loading, with loading strain rate increasing, the output electric displacement increases accordingly. When the strain rate reaches 258s-1, the output electric displacement does not increase substantially and remains unchanged. Within a certain range, 2-2 cement-based piezoelectric composites have linear characteristics and frequency response characteristics, which provide an important reference for sensor fabrication.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"63 CN_suppl_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":"128164742","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
Temperature Controlled Self-Folding Design Using Thermo-Sensitive Hydrogel Pnipam 利用热敏水凝胶设计温控自折叠
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019269
Qian Wu, C. Gao, Yan Shi
{"title":"Temperature Controlled Self-Folding Design Using Thermo-Sensitive Hydrogel Pnipam","authors":"Qian Wu, C. Gao, Yan Shi","doi":"10.1109/SPAWDA48812.2019.9019269","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019269","url":null,"abstract":"PNIPAM, a typical thermo-sensitive hydrogel, possesses the ability to swell significantly under its lower critical solution temperature (LCST), offering a novel way to assembly 3D film structures. To clarify the mechanism of the assembly process, we apply PNIPAM to thin rectangular bilayers with another hydrophobic polymer polycaprolactone (PCL), which can turn into self-bending curved bridges in 25 °C aqueous environment. This simple bilayer geometry makes it possible from 2D to 3D automatically and can be applied to thermally responsive actuation of micro-devices. Then we proposed a self-folding table-like structure which is thermally responsive. Moreover, the finite element analysis (FEA) and experiments are employed to validate the assembly process. The design concepts and simulation techniques may serve as the guidelines for the thermal driven assembly design.","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":"126100413","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
Study on the Variation Law of Sensitivity of Hydrophone Under the Condition of Acoustic Baffle 隔声条件下水听器灵敏度变化规律研究
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019294
Tian-ji Zhao
{"title":"Study on the Variation Law of Sensitivity of Hydrophone Under the Condition of Acoustic Baffle","authors":"Tian-ji Zhao","doi":"10.1109/SPAWDA48812.2019.9019294","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019294","url":null,"abstract":"Aiming at the influence of anti-acoustic baffle on the acoustic characteristics of hydrophone, the sound field model of hydrophone under the influence of anti-acoustic baffle is established by using finite element software, and the sensitivity variation law is analyzed. The simulation results show that the anti-acoustic baffle and the hydrophone can be placed at 45°, and the former can increase the sensitivity of the latter by 6dB in a certain frequency range. This frequency range varies with the change in the anti-sound coefficient of the baffle and the distance between the hydrophone and the baffle. The research results have guiding significance for designing high-sensitivity hydrophones in the future.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"55 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":"115409569","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
Effect of Dynamic Compressive Load on Piezoelectric Properties of Lead Zirconate Titanate Ceramics 动态压缩载荷对锆钛酸铅陶瓷压电性能的影响
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019220
Teng Wang, Wen-jie Cheng, W. Xue, Fan Jiang, Yi-Han Hu, Jiang-ying Chen
{"title":"Effect of Dynamic Compressive Load on Piezoelectric Properties of Lead Zirconate Titanate Ceramics","authors":"Teng Wang, Wen-jie Cheng, W. Xue, Fan Jiang, Yi-Han Hu, Jiang-ying Chen","doi":"10.1109/SPAWDA48812.2019.9019220","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019220","url":null,"abstract":"The piezoelectric properties and domain switching phenomena of piezoelectric ceramics under different strain rate impact loading were experimentally studied by using the Split Hopkins Pressure Bar measuring device. The variation of piezoelectric parameters were analyzed, such as piezoelectric strain constant, resonant frequency, electromechanical coupling coefficient, dielectric loss, dielectric constant and quality factor. The research shows that piezoelectric ceramics have obvious strain rate effect; with the increase of strain rate, the piezoelectric strain constant, resonant frequency, electromechanical coupling coefficient, dielectric loss and quality factor have a linear change in the normalized range, but there is a threshold value. That is, when the strain rate exceeds this value, the corresponding parameters will be abruptly changed, and the internal domain inversion of the sample is obviously intensified.","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":"128566251","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
Laser Ablation Induced Toughness Enhancement in Twin Crystal Copper 激光烧蚀诱导双晶铜韧性增强
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019226
Xin Huang, Hai-lin Deng, Xia-wei Li, Zhihua Zhou, Xiaobao Tian
{"title":"Laser Ablation Induced Toughness Enhancement in Twin Crystal Copper","authors":"Xin Huang, Hai-lin Deng, Xia-wei Li, Zhihua Zhou, Xiaobao Tian","doi":"10.1109/SPAWDA48812.2019.9019226","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019226","url":null,"abstract":"Free surfaces and inner defects (such as grain boundary) facilitate initiating of melting. The grain boundary can affect the toughness of polycrystal Copper. In this paper, the melting copper nanoparticles have been studied by a model that combines two-temperature and molecular dynamics methods. After laser ablation, a 45-degree grain orientation presents an unusual toughness behaviour. The higher failure strain of the twin crystal copper with laser ablation than it has not. It can be found that the dislocations and grain boundary interaction paly the main role. It gives a new view that the laser can enhance the toughness of Cu crystal.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"46 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":"124136205","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
SPAWDA 2019 TOC 亚太经济合作组织 2019 年贸易与合作会议
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/spawda48812.2019.9019257
{"title":"SPAWDA 2019 TOC","authors":"","doi":"10.1109/spawda48812.2019.9019257","DOIUrl":"https://doi.org/10.1109/spawda48812.2019.9019257","url":null,"abstract":"","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"73 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":"133969035","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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