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

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Strain Sensitivity of Epoxy-Quartz Packaged Saw Strain Sensors 环氧-石英封装锯片应变传感器的应变灵敏度
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019238
Pengfei Li, Hong-lang Li, Li-na Cheng, Yabing Ke, Yahui Tian
{"title":"Strain Sensitivity of Epoxy-Quartz Packaged Saw Strain Sensors","authors":"Pengfei Li, Hong-lang Li, Li-na Cheng, Yabing Ke, Yahui Tian","doi":"10.1109/SPAWDA48812.2019.9019238","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019238","url":null,"abstract":"A SAW strain sensor with new simplified Epoxy-Quartz packaging is analyzed in this paper. The strain sensitivity of sensors with Epoxy-Quartz Package is calculated with perturbation theory and finite element method theoretically. The sensitivity is close to the sensitivities of traditional AQP, which are 3.20 ppm / με and 3.32 ppm / με respectively. Then an Epoxy-Quartz Packaged 433MHz SAW strain sensor is fabricated by using the epoxy EP-4 adhesive. An experimental platform is set up and the strain sensitivity of Epoxy-Quartz Packaged is measured at 20 °C. The experimental results indicate that strain sensitivity of Epoxy-Quartz Packaged is 2.51 ppm / με, which almost agrees with theoretical results. Therefore, a new simplified package for SAW strain sensor with a relatively high strain sensitivity is verified in this paper.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"126 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":"133979545","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: 3
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
Identification of Ultrasonic Overlapped Signals based on Attenuation Matching and Sparse Deconvolution 基于衰减匹配和稀疏反卷积的超声重叠信号识别
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019315
Qiang Wang, Jie Mao, Guoxuan Lian
{"title":"Identification of Ultrasonic Overlapped Signals based on Attenuation Matching and Sparse Deconvolution","authors":"Qiang Wang, Jie Mao, Guoxuan Lian","doi":"10.1109/SPAWDA48812.2019.9019315","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019315","url":null,"abstract":"The difficulty of detecting the thickness of steel layer under high attenuation rubber mainly includes the signal-to-noise ratio and axial resolution. The ultrasonic chirp-coded excitation method with attenuation matching can obtain higher signal-to-noise ratio gain at the expense of axial resolution. However, the wider main lobe and the primary echo of rubber steel interface will seriously interfere with the judgment of steel thickness. In order to solve this problem, sparse deconvolution can be used to improve the resolution of echo based on the attenuation matching method. The results show that the signal-to-noise ratio gain brought by the attenuation matching method is conducive to the echo recognition of sparse deconvolution, and the design scheme of wavelet considering attenuation can obtain better deconvolution effect.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"13 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":"133091335","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 High-Power and High-Efficiency Bender Transducer 一种大功率高效弯管传感器
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019242
Ji-wu Liu
{"title":"A High-Power and High-Efficiency Bender Transducer","authors":"Ji-wu Liu","doi":"10.1109/SPAWDA48812.2019.9019242","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019242","url":null,"abstract":"Over the past several years,Hangzhou Applied Acoustics Research Institute (HAARI) hasdeveloped the ring transducer,including the air-backed ring transducer(ABRT) and free-flooded ring transducer(FFRT). Previous papers[1][2] described a kind of monostatic ABRT with radially poled ceramic and a broadband monostatic segmented FFRT with tangentially poled ceramic.In order to meet the requirements of small-sizedness,high-power,and high-effciency requirements,HAARI conducted in-depth research on bender disk transducers(BDT).The BDT described in this paper was potted in polyurethane,with a mass of 4.3kg in air.Tt has a maxium diameter of 190 mm.Both projector and hydrophone operation are available.The measured maximum transmitting voltage response(TVR) is 139.1dB//μPa @1m/V,@1.43kHz and the quality factor (Q) is 6.5. The maximum sound pressure level(SPL) is greater than 204.1dB. But in practice the output power of the power-amplifier is small,so the measured SPL is 201.8 dB,and for this measurement was tested at a water depth of 31 m. The acoustic output efficiency at resonance is 93.3% if we assumed the directivity index(DI) is 0.The maximum of the Receiving Voltage Response (RVS) in free field is -156.9dB//V/μPa@1.53kHz.The frequency band with receiving response decreasing 3dB is from 1.4kHz to 1.6kHz.The transducer is robust enough to withstand hydrostatic pressure at 4.5 MPa.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"11 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":"115165486","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 Vibration Isolation Performance of Intelligent Periodic Structure for Urban Viaduct 城市高架桥智能周期结构隔振性能研究
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019278
Peng Zhao, Lili Yuan, Zhuolin Ye, B. Wang
{"title":"Study on Vibration Isolation Performance of Intelligent Periodic Structure for Urban Viaduct","authors":"Peng Zhao, Lili Yuan, Zhuolin Ye, B. Wang","doi":"10.1109/SPAWDA48812.2019.9019278","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019278","url":null,"abstract":"In this paper, cement-based piezoelectric composite material is introduced into the periodic structure. A type of one-dimensional phononic crystal structure was proposed to overcome the difficulty of opening the low-frequency band gap. By the finite element method, the band gap structure was calculated. The influencing factors of the band gap were analyzed. The results show that the lower the density of hard clay, the higher the cut-off frequency of the band gap, while the higher the density of cement-based piezoelectric composite material, the lower the starting frequency of the band gap. The width of band gap also closely related to the lattice constant of the structure and the filling rate of material.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"26 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":"123456515","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
Reflection and Transmission of Thermoelastic Waves Through a Sandwiched Slab with Couple Stress 热弹性波在耦合应力夹层板中的反射和透射
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019309
Changda Wang, Yingjie Zhang, P. Wei, Yueqiu Li
{"title":"Reflection and Transmission of Thermoelastic Waves Through a Sandwiched Slab with Couple Stress","authors":"Changda Wang, Yingjie Zhang, P. Wei, Yueqiu Li","doi":"10.1109/SPAWDA48812.2019.9019309","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019309","url":null,"abstract":"The reflection and transmission of the thermos-elastic coupled waves across a slab of finite thickness that is sandwiched between two semi-infinite homogeneous isotropic couple stress elastic solids are studied. Based on the modified couple-stress theory and the Green-Lindsay theory, the governing equations of the thermoeleastic wave propagation are derived. Different from the classic elastic solid, the interface conditions involve the micro-rotation and the surface couple. The nontraditional interface conditions between the slab and two half-spaces are used to obtain the linear algebraic equations set from which the amplitude ratios of reflection and transmission waves can be determined. Then, the energy fluxes carried by reflection and transmission waves are calculated numerically and the normal energy flux conservation is used to validate the numerical results. At last, the influences of two thermal relaxation times are discussed based on the numerical results. It is found that the thermos-elastic coupling makes the longitudinal wave and the thermal wave not only dispersive but also attenuated, and the thermal wave effect mainly affects the dilatational waves.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"157 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":"121679233","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
Theoretical Investigation of Sound Insulation of Asymmetric Coupled-Membrane Acoustic Metamaterials 非对称耦合膜声学超材料隔声性能的理论研究
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019316
Ding Tong, Hongyan Tian, Yanli Zhang, Xin Li
{"title":"Theoretical Investigation of Sound Insulation of Asymmetric Coupled-Membrane Acoustic Metamaterials","authors":"Ding Tong, Hongyan Tian, Yanli Zhang, Xin Li","doi":"10.1109/SPAWDA48812.2019.9019316","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019316","url":null,"abstract":"Being as simple and lightweight structure in controlling low frequency noise, membrane-type acoustic metamaterial has been paid more attention. In this paper, theoretical model and analytical approach are presented to study the low frequency transmission loss performances of coupled-membrane type acoustic metamaterial(CMAM). The influences of the symmetric and asymmetric structures on the noise attenuation characteristics are discussed. The results demonstrate that asymmetric structure of CMAM is an ideal sound insulation material. By choosing proper material properties, multi-frequency and broad band sound insulation can be get in low frequency range (<1000Hz).","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"44 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":"125122935","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
Acceleration Sensitivity Analysis of Hydrophone 水听器加速度灵敏度分析
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019310
Guo-liang Yan, Xin-ran Xu, Zhen-yu Zheng, Wei Gao
{"title":"Acceleration Sensitivity Analysis of Hydrophone","authors":"Guo-liang Yan, Xin-ran Xu, Zhen-yu Zheng, Wei Gao","doi":"10.1109/SPAWDA48812.2019.9019310","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019310","url":null,"abstract":"The working environment of platform has put forward many requirements on the performance of hydrophone, and the sound pressure sensitivity and acceleration sensitivity are the most important, especially the acceleration sensitivity, which determines whether the hydrophone can effectively resist the vibration noise interference caused by platform vibration and eddy current. Reducing the acceleration sensitivity can improve the signal to noise ratio of hydrophone and reduce the minimum detectable signal. In this paper, the acceleration sensitivity mechanism of hydrophone is analyzed theoretically, and four methods to reduce the acceleration sensitivity of hydrophone are put forward. The four cases are analyzed by COMSOL finite element software.","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":"129183488","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
Mini-Size Hollow Inertia Ultrasonic Motor for Smart Phone Lens 用于智能手机镜头的微型空心惯性超声波马达
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019235
Rui Xu, Ying Yang, Jianmin Qiu, Jiong-jiong Hu
{"title":"Mini-Size Hollow Inertia Ultrasonic Motor for Smart Phone Lens","authors":"Rui Xu, Ying Yang, Jianmin Qiu, Jiong-jiong Hu","doi":"10.1109/SPAWDA48812.2019.9019235","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019235","url":null,"abstract":"In this paper, a novel miniature hollow inertial ultrasonic motor is proposed and manufactured. The motor consists three parts, transducer, friction pairs and slider. The motor is driven by the principle of inertia and exploit the difference between static and kinetic friction forces at the contact surface of friction pairs. Compact structure design and linear output make it suitable to serve in miniature zoom systemsuch as smart phone lens. Simulation in comsol was performed to analyze natural frequency and vibration mode of the motor. The influence of excitation signals and coulomb friction were tested. A prototype of this motor was manufactured and the mechanical experiments were performed. The results of simulation and experiments are analyzed and discussed.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"PP 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":"126450422","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
Characteristics of Love Wave Device with Ni Pillars on Zno/R-Sapphire Structure Zno/ r -蓝宝石结构上Ni柱Love波器件的特性
2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI: 10.1109/SPAWDA48812.2019.9019271
Xiao-qing Liu, Shu-lin Shang, Yan Wang, Suzhen Liang
{"title":"Characteristics of Love Wave Device with Ni Pillars on Zno/R-Sapphire Structure","authors":"Xiao-qing Liu, Shu-lin Shang, Yan Wang, Suzhen Liang","doi":"10.1109/SPAWDA48812.2019.9019271","DOIUrl":"https://doi.org/10.1109/SPAWDA48812.2019.9019271","url":null,"abstract":"Phononic crystals (PnCs) have attracted considerable attention in recent years because of the ability to control and manipulate acoustic and elastic wave propagation. A Love wave device composed of Nickel pillars on (110)ZnO/R-sapphire substrate is constructed by using COMSOL Multiphysics. The characteristics of the device, including the phase velocity (vp) and the electromechanical coupling coefficient (k2), are theoretically analyzed by finite element method (FEM). The results show that the 1st mode of love waves appear at hZnO/λ=0.0625, while the point of occurrence is 0.31 at PnCs-free SAW structure. And the maximum electromechanical coupling coefficient(k2) of 3.27% is obtained by optimizing the structure of Nickel pillars, which is much higher than that of PnCs-free structure. All of the results indicate that the performances of the love wave device based on Nickel pillars/(110)ZnO/R-sapphire structure are superior to that of PnCs-free structure. And it provides a theoretical basis for designing Love wave devices with high frequency.","PeriodicalId":208819,"journal":{"name":"2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)","volume":"92 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":"128642437","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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