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The calculation of electrical circuit parameters of quartz crystal resonators with consideration of equivalent viscosity 考虑等效粘度的石英晶体谐振器电路参数计算
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167270
Ji Wang, Yumei Chen, Li-hong Wang, R. Wu, Jianke Du
{"title":"The calculation of electrical circuit parameters of quartz crystal resonators with consideration of equivalent viscosity","authors":"Ji Wang, Yumei Chen, Li-hong Wang, R. Wu, Jianke Du","doi":"10.1109/SPAWDA.2011.6167270","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167270","url":null,"abstract":"Electrical circuit parameters such as resistance and quality factor of a quartz crystal resonator cannot be determined through vibration analysis without considering the presence of dissipation. We know that electrical parameters are strongly affected by viscosity from material damping, manufacturing, and packaging processes. The results show that the motional resistance from theoretical calculation with material viscosity which is from earlier measurements is much smaller than actual measurements, and it is suspected that the viscosity from substructures, bonding, air, packaging and so on are not considered but are significant. Thus, this paper we calculate electrical parameters of AT-cut quartz crystal resonators through the consideration of equivalent viscosity with complex elastic constants.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128791213","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
Development of an anti-vibration crystal oscillator for reducing vibration-induced phase noise 用于降低振动相位噪声的抗振晶体振荡器的研制
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167230
Shurong Xu, Zhonglei Chen
{"title":"Development of an anti-vibration crystal oscillator for reducing vibration-induced phase noise","authors":"Shurong Xu, Zhonglei Chen","doi":"10.1109/SPAWDA.2011.6167230","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167230","url":null,"abstract":"Crystal oscillators are acceleration sensitive devices. Vibration will degrade the phase noise of crystal oscillators in many applications such as aircrafts, ground vehicles, and even in the laboratory due to cooling fans, footsteps, etc. This paper presents development of an anti-vibration crystal oscillator (AVXO) for reducing phase noise degradation due to mechanical vibration on the crystal oscillator. The approach for reducing phase noise degradation starts with choosing crystal resonators, designing isolators, and simulating the transmissibility of the isolator and the phase noise of the AVXO under random vibration. The measured phase noise is typically better than −145dBc/Hz at 1 kHz offset frequency from the carrier frequency of 100 MHz, when crystal oscillators are under operational vibration condition. The measured results show that the isolator in the AVXO is actually providing in excess of 40 dB improvement at 1 kHz offset frequency.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127559217","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
Compressive type accelerometer made by leadfree Bi0.5Na0.5TiO3- based piezoceramics 由无铅Bi0.5Na0.5TiO3基压电陶瓷制成的压缩式加速度计
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167280
Kui-yong Yang, M. Zhu, Y. Hou, Hui Yan
{"title":"Compressive type accelerometer made by leadfree Bi0.5Na0.5TiO3- based piezoceramics","authors":"Kui-yong Yang, M. Zhu, Y. Hou, Hui Yan","doi":"10.1109/SPAWDA.2011.6167280","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167280","url":null,"abstract":"Compressive type accelerometers are widely used in various vibration measurements. Lead-free piezoelectric ceramics as sensitive element have been preferred from the viewpoint of environmental impact. In this paper, 0.30 wt% MnO-added Bi0.485Na0.425K0.06Ba0.03TiO3 (BNKB) piezoelectric ceramics were used as the sensitive element in a compressive type accelerometer. Based on the finite element analysis, the influences of the mass of the preloading element and the thickness of the sensitive piezo-rings on charge sensitivity and operation frequency were analyzed, thus optimizing the structure and parameters of the accelerator. The sensitivity (calibrated by a back-to-back method) of the accelerometer as-fabricated was measured to be 3.9 pC/m·s−2 within 100 Hz–5 kHz within the 2dB tolerance.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121848805","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
Far field solution of SH-wave scattered by a cavity with arbitrary shape in anisotropic medium 任意形状腔体在各向异性介质中散射sh波的远场解
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167308
Zhi-gang Chen, Jia-long Wu
{"title":"Far field solution of SH-wave scattered by a cavity with arbitrary shape in anisotropic medium","authors":"Zhi-gang Chen, Jia-long Wu","doi":"10.1109/SPAWDA.2011.6167308","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167308","url":null,"abstract":"Based on the method of complex functions, the SH-wave scattered by a cavity with arbitrary shape in infinite anisotropic medium is investigated, and a far field solution of displacement is presented. As a result, the far field properties of the SH-wave scattered by circular, elliptical and square cavities in an anisotropic elastic medium with a symmetry plane are analyzed and some curves describing the far field properties of scattering SH-wave are obtained. The results show that the far field characteristic properties of the scattering SH-wave are determined by the incident wave, the geometric shape and the properties of medium. Additionally, the anisotropy of elastic medium has more significant influence on the far field displacement distribution than isotropy.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121755129","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 finite magnetoelectroelastic plate with a cavity under mechanical-electric-magnetic loading 机械-电-磁载荷作用下带腔的有限磁-电弹性板
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167216
P. Chaudhary, C. Gao
{"title":"A finite magnetoelectroelastic plate with a cavity under mechanical-electric-magnetic loading","authors":"P. Chaudhary, C. Gao","doi":"10.1109/SPAWDA.2011.6167216","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167216","url":null,"abstract":"The 2D problem of a finite plate with a circular/elliptic cavity under anti-plane shear and in-plane electric-magnetic field loadings is studied in this paper. Laurent series is adopted to express the analytical function inside the circular cavity and the finite plate, and Faber series with conjunction of conformal mapping is applied to express the analytical function inside the elliptic cavity. Numerical algorithm is developed based on boundary collocation method (BCM) to deal the traction boundary condition (i.e. Neumann BC) at the edges of the plate and exactly permeable, natural boundary condition (i.e. Dirichlet BC) at the cavity surface. Graphical results are presented to discuss the effect of the loading condition and the plate size on the behaviors of local stresses. The solution shows that the electric field inside the cavity is uniform in the case of a finite plate, which is the same to the case of an infinite plate.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124492397","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
Life prediction model of friction material for traveling wave ultrasonic motor 行波超声电机摩擦材料寿命预测模型
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.3901/JME.2011.01.096
Xiu Tian, J. Qu, Jian-chun Li, Yan-li Wang, Yuedong Lang
{"title":"Life prediction model of friction material for traveling wave ultrasonic motor","authors":"Xiu Tian, J. Qu, Jian-chun Li, Yan-li Wang, Yuedong Lang","doi":"10.3901/JME.2011.01.096","DOIUrl":"https://doi.org/10.3901/JME.2011.01.096","url":null,"abstract":"Traveling wave ultrasonic motor (TWUSM) relies on friction force for torque transmission. Wear often exists on friction material (FM) inevitably, and largely affects life of TWUSM. A new life prediction model of FM for TWUSM was proposed. Compared with standing wave USM, wear of TWUSM FM was resulted from scratching of traveling wave crests on stator. Considering motion of a particle in contact interface between stator and rotor, visco-elastic polymer contact model was used to calculate normal pressure distribution and relative sliding speed, which were introduced to traditional wear law of Archard. In the model, special relation between time and distance for traveling wave was used to analyze contact intervals. The change of thickness of FM during service which made decrease of preload was also taken into account. Parameters of common disc-type TWUSM were used to compute life prediction curve, and meanwhile the experimental investigation was carried out. The life prediction result found out to be consistent with the test.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131591610","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
Research on the excitation modes of PZT element in bending cylindrical transducers 弯曲圆柱形换能器中PZT元件激励模式的研究
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167250
Ting-hai Cheng, Xiang-dong Guo, Gang Bao
{"title":"Research on the excitation modes of PZT element in bending cylindrical transducers","authors":"Ting-hai Cheng, Xiang-dong Guo, Gang Bao","doi":"10.1109/SPAWDA.2011.6167250","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167250","url":null,"abstract":"The PZT element acts as a core component which transforms the input electric energy to output mechanical energy in ultrasonic transducer. So the excitation modes of PZT element have an important influence on the characteristics of transducer. The force factor formulas of cylindrical transducers based on the bending vibration mode are deduced in theory and the excitation modes of PZT elements in bending cylindrical transducers were investigated. In detail, the influence of distributing positions and dimensions of PZT plates on the output performance of transducer were discussed and simulated by FEM. It indicated that disposing the PZT plates on the peak of strain curve for the bending vibration mode is the optimal method to excite the transducer. The total length of PZT element should not exceed the distance of two vibration nodes. For the bending cylindrical transducer bonded with PZT plates, increasing the thickness of each PZT plate is propitious to enhance the output characteristics of this type transducer. Whereas, the thickness of each PZT plate should be decreased to achieve an excellent performance for the transducer with a sandwich structure.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131693082","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
Comparison of different operational modes on LiTaO3 LFE bulk acoustic wave sensors LiTaO3 LFE体声波传感器不同工作模式的比较
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167194
T. Ma, Ji Wang, Chao Zhang, R. Wu
{"title":"Comparison of different operational modes on LiTaO3 LFE bulk acoustic wave sensors","authors":"T. Ma, Ji Wang, Chao Zhang, R. Wu","doi":"10.1109/SPAWDA.2011.6167194","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167194","url":null,"abstract":"Previous studies have shown that when working in liquid, (yxl)90° LiTaO3 LFE devices work on pure-LFE mode (the observed bulk acoustic wave is excited by the lateral field) and (yxl)0° LiTaO3 LFE devices work on pseudo-LFE mode (the observed bulk acoustic wave is not excited by the lateral field but the thickness field with the liquid acting as an virtual electrode). In this work, LiTaO3 LFE devices on both modes are designed and fabricated. The devices' sensitivities to liquid conductivity and permittivity were tested and compared. The experimental results showed that compared to the LiTaO3 pure-LFE device, the LiTaO3 pseudo-LFE device has much higher sensitivities to liquid electrical property changes.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"9 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132603043","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
Determination of the surface wave dispersion of a coating excited by laser 激光激发涂层表面波色散的测定
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167296
Xue-hang Song, Yongdong Pan, Z. Zhong
{"title":"Determination of the surface wave dispersion of a coating excited by laser","authors":"Xue-hang Song, Yongdong Pan, Z. Zhong","doi":"10.1109/SPAWDA.2011.6167296","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167296","url":null,"abstract":"A detailed study is undertaken to analyze the dispersion characteristics of a coating under laser excitation. The surface wave dispersion is one of its inherent properties. Two-dimensional Fourier transform is applied to convert the experiment data in the time-space domain into the frequency-wave-number domain, where the peaks form the dispersive curves. A coherent method is proposed to precisely measure the dispersive curves of coatings. The use of the phase information and magnitude spectrum makes the measurements more precise and stable than traditional non-coherent methods. Additionally, storage depth of oscilloscope affects the precision of dispersion curves. The technique of obtaining the dispersive curves with high precision is an efficient tool to solve the inversion problem.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114966722","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 transmission electron microscopy study of submicrometer BiFeO3 particle prepared by an improved solid state reaction 改进固相反应制备亚微米BiFeO3粒子的透射电镜研究
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167282
Mei-ju Si, Y. Hou, H. Ge, M. Zhu, Hui Yan
{"title":"A transmission electron microscopy study of submicrometer BiFeO3 particle prepared by an improved solid state reaction","authors":"Mei-ju Si, Y. Hou, H. Ge, M. Zhu, Hui Yan","doi":"10.1109/SPAWDA.2011.6167282","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167282","url":null,"abstract":"In this work, submicrometer bismuth ferrite (BiFeO3) particles have been prepared at the temperature of 750 °C by the improved solid state reaction, in which the quick sintering step is crucial in obtaining pure perovskite phase. The X-ray diffractometer (XRD) analysis indicates that the obtained BiFeO3 particles are rhombohedral structure, and the refined cell parameters are a=5.622Å and α=59.355° (R=8.35%), similar to the reported data (JCPDS Card 86–1518, a=5.632Å and α=59.356°). The microstructure has been observed using transmission electron microscope (TEM), and the image shows that BiFeO3 powders have the quasi spherical morphology with the mean particle size between 100–150nm. Further, the distinct lattice fringes reveal the nature of the single-crystalline BiFeO3 nanostructure, and the interplanar spacing is about 0.87nm, corresponding well to the double spacing of (012). Moreover, it is interesting to note that there existed the dislocation in BiFeO3 particle, which is believed to arise from the collision of different grains in growing process. The sintered compact bodies from BiFeO3 fine particles show the slim ferroelectric loops, and dielectric properties are frequency independent. The measured dielectric constant and loss tangent are 19.5 and 0.0025 at room temperature, showing the potential application in multiferroic devices.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114939609","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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