IEEE Transactions on Sonics and Ultrasonics最新文献_第4页

The SAW-FET Signal Processor SAW-FET信号处理器

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31658

J.B. Green, G. Kino

引用次数: 7

A Modified ZnO Film Model for Calculating Elastic and Piezoelectric Properties 一种用于计算弹性和压电性能的修正ZnO薄膜模型

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-09-01 DOI: 10.1109/T-SU.1985.31646

Qian Zenxing, Zhang Xiaozhong, Zhao Mingzhou, Wu Xizhang, Lin Yujin

{"title":"A Modified ZnO Film Model for Calculating Elastic and Piezoelectric Properties","authors":"Qian Zenxing, Zhang Xiaozhong, Zhao Mingzhou, Wu Xizhang, Lin Yujin","doi":"10.1109/T-SU.1985.31646","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31646","url":null,"abstract":"Abstmct-A modified ZnO film model to calculate the elastic and pi- ezoelectric constants and the SAW velocities of ZnO film (c-axis ori- ented) substrate layer structure is proposed. The influences of the ran- dom orientation and lattice distortion have been taken into account. Compared to the traditional single crystal model, the theoretical results of the modified model fit better with the experimental values of a laser- probe measuring system. minor effect on the SAW properties of the ZnO substrate layer structure when it is not larger than 3 O. In the present case the mean is less than l\"; therefore, for simplicity it is assumed to be zero, and only the effect of U (o is equal to 3\" from the X-ray diffraction pattern) is taken into ac- count. In our model, the ZnO film is treated as a collec- tion of many monocrystal columns. The orientation 7 of the c-axis of each crystal column has the value within ( -T/ 2, 7r/2) on both the y-z and x-z planes. The material pa- rameters of the monocrystal column with the c-axis ori- entation of 17 can be calculated by assuming that 17 follows the normal distribution Since all the monocrystal columns with c-axis orientations contribute to the material parameters, their mathematical expectation can be taken as the material parameters of ZnO film. The average can be obtained by integrating with respect to 7 twice, first in the x-z plane and then in the y- z plane. Since 7 is a two-dimensional variable, the first integration process in the x-y plane can be stated as fol- lows :","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114674931","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

A New Synthetic-Aperture Focusing Method for Ultrasonic B-Scan Imaging by the Fourier Transform 基于傅里叶变换的超声b扫描合成孔径聚焦新方法

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31627

K. Nagai

引用次数: 91

Electromagnetic Acoustic Wave Source and Measurement and Calculation of Vertical and Horizontal Displacements of Surface Waves 电磁声源及面波垂直和水平位移的测量与计算

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31625

K. Kawashima

引用次数: 13

The Thickness Modes of a Quartz Plate Resonator in a Lateral DC Field 石英板谐振器在横向直流场中的厚度模式

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31637

C. K. Hruska, M. Kucera

引用次数: 9

Temperature Coefficients of the Elastic Constants of SiO2Layers sio2层弹性常数的温度系数

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31636

Nour-Eddin El Faouzi, J. Saurel, J. Lassale, G. Cambon

引用次数: 2

Piezoelectric Composite Materials for Ultrasonic Transducer Applications. Part I: Resonant Modes of Vibration of PZT Rod-Polymer Composites 用于超声波换能器的压电复合材料。第一部分:PZT棒-聚合物复合材料振动的共振模式

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31623

T. R. Gururaja, Walter A. Schulze, L. E. Cross, Robert, Newnham, BERTRAMA. Auld, Yuzhong, Wang Abstmcr-Theobjective

{"title":"Piezoelectric Composite Materials for Ultrasonic Transducer Applications. Part I: Resonant Modes of Vibration of PZT Rod-Polymer Composites","authors":"T. R. Gururaja, Walter A. Schulze, L. E. Cross, Robert, Newnham, BERTRAMA. Auld, Yuzhong, Wang Abstmcr-Theobjective","doi":"10.1109/T-SU.1985.31623","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31623","url":null,"abstract":"Abstmcr-The objective of the present work was to gain a deeper mensions of the transducer are much smaller than the understanding of the behavior of lead zirconate titanate (PZT) polymer composites for applications such as ultrasonic medical diagnosis in the megahertz frequency range. These composites were originally developed for low-frequency hydrophone applications. The PZT rod-polymer composites have been prepared with five to 30 volume percent PZT using 0.28 mm and 0.45 mm rods. In a disc of PZT rod-polymer composite material, there are three principal types of resonance: the planar mode, the thickness mode, and various lateral modes caused by the regular periodicity of the PZT rod in the composite. These resonance modes have been studied with the following techniques: 1) electrical impedance measurement as a function of frequency and 2) laser probe dilatometry of the dynamic displacement as a function of frequency and position in the composite lattice. The observed resonance behavior is found to be a result of lateral interactions in the composite through the epoxy medium. The effect of temperature on the electromechanical properties of the composite has also been investigated. Implications of these results for optimizing the design of ultrasonic transducers are discussed.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123003854","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: 320

Piezoelectric Composite Materials for Ultrasonic Transducer Applications. Part II: Evaluation of Ultrasonic Medical Applications 用于超声波换能器的压电复合材料。第二部分:超声医学应用评价

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31624

T. R. Gururaja, Walter A. Schulze, L. E. Cross, R. Newnham

{"title":"Piezoelectric Composite Materials for Ultrasonic Transducer Applications. Part II: Evaluation of Ultrasonic Medical Applications","authors":"T. R. Gururaja, Walter A. Schulze, L. E. Cross, R. Newnham","doi":"10.1109/T-SU.1985.31624","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31624","url":null,"abstract":"Abstmct-The electro-acoustic properties of Lead zirconate titanate (PZT) rod-polymer composites relevant for ultrasonic transducer applications are reported. Acoustic impedance of the composite materials was measured by three different techniques in the frequency range 0.33.5 MHz. Dependence of the acoustic impedance as a function of volume fraction of PZT and frequency was also modeled theoretically. Time-delay spectrometry was employed to calibrate the free-field transmitting and receiving voltage responses of the composite materials. The acoustic impedance of the composite materials was in the range of 3-10 M rayl. The figure of merit in the receiving mode of composite materials was three times that of PZT. The figure of merit for a 20percent PZT composite (2 = 7.3 M rayl) was further enhanced by 50 percent using a single-layer impedance transformer of lucite (2 =3.3 M rayl). These composite materials were molded into curved shapes by simple thermal process to fabricate focused transducers. The axial and lateral beam profiles of focused composite transducers are presented.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"58 22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131234693","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: 134

Spatial Frequency Domain Technique: An Approach for Analyzing the Scanning Laser Acoustic Microscope Interferogram Images 空间频域技术:一种扫描激光声显微镜干涉图图像分析方法

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31629

K. Tervola, W. O’Brien

{"title":"Spatial Frequency Domain Technique: An Approach for Analyzing the Scanning Laser Acoustic Microscope Interferogram Images","authors":"K. Tervola, W. O’Brien","doi":"10.1109/T-SU.1985.31629","DOIUrl":"https://doi.org/10.1109/T-SU.1985.31629","url":null,"abstract":"Abstmf-An acoustic interferogram of equal phase wavefronts is produced with the scanning laser acoustic microscope. The interferogram contains information about the ultrasonic velocity distribution of the specimen under investigation. Through appropriate signal processing, the information can be transformed into a one-dimensional velocity map. This has been done quite successfully in the spatial domain, where the specimen is relatively homogeneous. For heterogeneous specimens, the spatial domain technique often fails. A new technique has been developed to reduce the interferograms to a one-dimensional velocity map. This approach operates in the spatial frequency domain and appears to be more reliable for heterogeneous specimens than the spatial domain approach. The theory and implementation of the spatial frequency domain technique (SFDT) are reported, and the two techniques are compared with each other. SFDT utilizes a smaller pixel size than the spatial domain technique. In addition SFDT is faster and more noise tolerant. The extension of the SFDT to produce two-dimensional velocity distribution images is also reported.","PeriodicalId":371797,"journal":{"name":"IEEE Transactions on Sonics and Ultrasonics","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121337145","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: 12

Studies of a Tunable SAW Oscillator Using a Differential SAW Delay Line with MOSFET Control 用差分SAW延迟线与MOSFET控制的可调谐SAW振荡器的研究

IEEE Transactions on Sonics and Ultrasonics Pub Date : 1985-07-01 DOI: 10.1109/T-SU.1985.31633

R. Amorosi, C. Campbell

引用次数: 6