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Proceedings. IEEE Ultrasonics Symposium最新文献

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Ultrasonic biomechanical strain gauge based on speckle tracking 基于散斑跟踪的超声生物力学应变仪
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67110
M. Bertrand, J. Meunier, M. Doucet, G. Ferland
{"title":"Ultrasonic biomechanical strain gauge based on speckle tracking","authors":"M. Bertrand, J. Meunier, M. Doucet, G. Ferland","doi":"10.1109/ULTSYM.1989.67110","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67110","url":null,"abstract":"The potential of ultrasonic speckle tracking for characterizing tissue dynamics was illustrated and validated by an experiment with a tissue-mimicking phantom undergoing compression during a 2-D echographic-sequence acquisition. The speckle linear transformation (LT) is then computed from successive frames in the echographic sequences using an optical-flow algorithm. Compression and expansion strains computed from speckle LT agree well with induced deformation values. The feasibility of the method was then investigated in a preliminary study of skeletal muscle contraction. Results indicate the usefulness of speckle tracking as a method for assessing the contractile performance of cardiac and skeletal muscles.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"43 1","pages":"859-863 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88056741","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: 90
Distortions of thickness shear mode shapes in plano-convex quartz resonators with mass perturbations 质量扰动下平凸石英谐振腔厚度剪切振型的畸变
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67018
E. P. Eernisse
{"title":"Distortions of thickness shear mode shapes in plano-convex quartz resonators with mass perturbations","authors":"E. P. Eernisse","doi":"10.1109/ULTSYM.1989.67018","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67018","url":null,"abstract":"A perturbation technique is developed for calculating the change in mode shape in a plano-convex thickness shear resonator blank due to off-center mass perturbations. The perturbed shape is built as a linear combination of the usual unperturbed modes and their anharmonics. The change in the center location of the mode is used to predict experimentally observed changes in the acceleration sensitivity of two-point mounted 10 MHz, 3rd, SC-cut resonators when patches of metal film are deposited on the major surfaces off-center.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"42 1","pages":"411-414 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78746049","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
High speed quantitative imaging over extended fields of view (medical ultrasound) 扩展视场的高速定量成像(医学超声)
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67147
T. Hall, M. Insana
{"title":"High speed quantitative imaging over extended fields of view (medical ultrasound)","authors":"T. Hall, M. Insana","doi":"10.1109/ULTSYM.1989.67147","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67147","url":null,"abstract":"The axial range over which a high-speed data-analysis technique yields accurate results is reported. Backscatter-coefficient estimates were used to compare this technique with the rigorously tested technique developed at the University of Wisconsin. Inaccuracies occurring when this technique is applied to strongly focused transducers are also described. The motivation for this work is to determine the applicability of the high-speed data-analysis approach to data acquired in the B-scan image plane.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"18 1","pages":"1037-1041 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78507058","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: 5
Optimization of a SAW metal oxide semiconductor gas sensor SAW金属氧化物半导体气体传感器的优化设计
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67051
R. S. Falconer, R. Lec, J. Vetelino, Z. Xu
{"title":"Optimization of a SAW metal oxide semiconductor gas sensor","authors":"R. S. Falconer, R. Lec, J. Vetelino, Z. Xu","doi":"10.1109/ULTSYM.1989.67051","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67051","url":null,"abstract":"A simple theoretical model is applied to the problem of a SAW (surface acoustic wave) gas sensor which operates on the principle of conductivity changes within the sensing film. The model allows the prediction of SAW sensor response for a film of known conductivity variations, and the theoretical value of SAW velocity change agrees very well with that determined by experiment. The electroacoustic attenuation was also determined to be a significant factor in designing a SAW sensor. SAW sensor response can be optimized by designing the device such that the sheet conductivity of the film is within some region dependent upon the substrate material. A WO/sub 3/ film could be designed to have a sheet conductivity within a specific range by tailoring parameters such as film thickness, doping, and heat treatment. A sensor consisting of an ST-cut SiO/sub 2/ substrate and a WO/sub 3/ film selectively sorbent to H/sub 2/S was investigated. The SAW gas sensor is configured so that the film sheet conductivity and sensor response are measured simultaneously upon exposure to H/sub 2/S. Specific operating conditions are obtained that optimized the SAW gas sensor response.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"33 1","pages":"585-590 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85528217","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: 6
Minimization of nonlinear acousto-optic Bragg cell intermodulation products 非线性声光布拉格细胞互调产物的最小化
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67037
D. R. Pape
{"title":"Minimization of nonlinear acousto-optic Bragg cell intermodulation products","authors":"D. R. Pape","doi":"10.1109/ULTSYM.1989.67037","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67037","url":null,"abstract":"The acoustooptic Bragg cell intermodulation products (IMPs) arising from multiple optical diffraction (dynamic IMPs) fundamentally limit Bragg-cell dynamic range. The IMPs arising from acoustic harmonic waves generated by the nonlinear elastic response of the Bragg cell crystalline lattice (elastic IMPs) may further limit dynamic range in Bragg cells operating at high frequencies or long time apertures. It is shown that the elastic IMPs can be minimized by increasing the Bragg-cell transducer length. The length can be increased without the attendant bandwidth loss using a phased array transducer. It is shown experimentally that this device is limited in dynamic range by the dynamic IMPs and thus exhibits the maximum spurious-free dynamic range possible.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"21 1","pages":"509-514 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84819009","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: 9
Ultrasonic vibration bending of metal plate specimens 金属板试件的超声振动弯曲
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67159
J. Tsujino, T. Ueoka, H. Itoh
{"title":"Ultrasonic vibration bending of metal plate specimens","authors":"J. Tsujino, T. Ueoka, H. Itoh","doi":"10.1109/ULTSYM.1989.67159","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67159","url":null,"abstract":"Ultrasonic vibration bending of a thin metal plate using a 27-kHz-vibration V-type bending die is studied. The 27-kHz vibration die consists of a longitudinal-to-longitudinal vibration-direction converter, four bolt-clamped Langevin type PZT transducers of 50-mm diameter, and four stepped horns. The bending die vibrates vertically to the bending punch and specimen plate. The bending angle is about 90 degrees . Bending-metal specimens used are commercially pure aluminum, anticorrosive aluminum, mild steel, and stainless steel plates of 1.6-mm thickness. The bending angle increases slightly as the die vibration amplitude increases under the same static bending pressure.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"41 1","pages":"1099-1102 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87281269","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
Accurate and precise measurement of blood flow using ultrasound time domain correlation 利用超声时域相关技术精确测量血流
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67115
I. Hein, V. Suorsa, J. Zachary, R. Fish, J. Chen, W. K. Jenkins, W. O’Brien
{"title":"Accurate and precise measurement of blood flow using ultrasound time domain correlation","authors":"I. Hein, V. Suorsa, J. Zachary, R. Fish, J. Chen, W. K. Jenkins, W. O’Brien","doi":"10.1109/ULTSYM.1989.67115","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67115","url":null,"abstract":"The goal of this research is to produce an ultrasonic device to assist in the diagnosis of venous thrombosis in humans. The ultrasound time-domain correlation technique can accurately and precisely estimate the volumetric fluid flow through a circular vessel without prior knowledge of the vessel diameter, flow velocity profile, or transducer measurement angle. This technique estimates the change in arrival time (instead of frequency) of ultrasound reflected from scatterers. A system based on this technique has been constructed and the technique has been verified in a blood-flow phantom system with both a blood-mimicking substance and porcine blood. Under in vitro conditions, the measurement angle has been determined within 5%, and continuous and pulsatile volumetric flow has been measured to 150 beats/min with an accuracy better than 18%.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"11 1","pages":"881-886 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89166338","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: 9
Ultrasonic diffraction along axes of two-fold symmetry 沿双重对称轴的超声衍射
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67183
E. Papadakis, F. Margetan, B. Newberry
{"title":"Ultrasonic diffraction along axes of two-fold symmetry","authors":"E. Papadakis, F. Margetan, B. Newberry","doi":"10.1109/ULTSYM.1989.67183","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67183","url":null,"abstract":"Agreement has been achieved between ultrasonic diffraction losses as measured and calculated for twofold symmetry axes. Measurements were made by the pulse-echo method with essentially monochromatic RF bursts and X-cut quartz transducers on [110] Si, Ge, and NaCl. Calculations were made using the Thompson-Newberry (T-N) measurement model which expresses the wavefield of the transducer as a Gauss-Hermite series and expands the slowness surface of the anisotropic medium in terms up through quadratic with azimuthal variability. In this formulation the [110] direction is a saddle point. The measurement model was checked against previous experimental and theoretical work and was found to reproduce the earlier results exactly. In principle, the T-N measurement model can handle diffraction losses in arbitrary directions.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"46 1","pages":"1221-1225 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75989473","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
Mass flow sensing using surface acoustic waves 利用表面声波进行质量流量传感
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67049
J. Brace, T.S. Sanfelippo, S. Joshi
{"title":"Mass flow sensing using surface acoustic waves","authors":"J. Brace, T.S. Sanfelippo, S. Joshi","doi":"10.1109/ULTSYM.1989.67049","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67049","url":null,"abstract":"A novel approach for measuring mass flow of gases is reported. A SAW (surface acoustic wave) delay line is heated above the ambient by absorbing RF power from an oscillator loop in which it also serves as the frequency-control element; forced convective cooling due to gas flow induces substantial frequency shifts. Utilization of RF power in the sensor is analyzed by applying a simple equivalent-circuit model. A mass-flow sensing configuration that utilizes dual SAW delay-line oscillators to provide temperature compensation and a convenient low-frequency output corresponding to mass-flow rate is described. For low flow rates, oscillator frequency increases linearly with the rate, and a normalized sensitivity greater than 4*10/sup -6//sccm at 150 mW input power has been obtained for nitrogen gas. Simplicity, high sensitivity, digitally compatible output, and low fabrication cost are some of the attractive features of this sensor.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"47 1","pages":"573-578 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90539648","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: 10
A Lamb wave electrostatic voltage sensor 兰姆波静电电压传感器
Proceedings. IEEE Ultrasonics Symposium Pub Date : 1989-10-03 DOI: 10.1109/ULTSYM.1989.67064
F.J. Bogacki
{"title":"A Lamb wave electrostatic voltage sensor","authors":"F.J. Bogacki","doi":"10.1109/ULTSYM.1989.67064","DOIUrl":"https://doi.org/10.1109/ULTSYM.1989.67064","url":null,"abstract":"Lamb-wave electrostatic voltage sensors have been fabricated using planar technology incorporating a standard interdigital transducer (IDT) array (for generation and detection of the Lamb waves) and a capacitative electrode placed on each side of the sensor substrate in the region of wave propagation (for applying the DC potential). The Lamb waves/modes generated for substrate thicknesses of 50, 102, and 254 mu m were identified using theoretical dispersion curves. The modes were of both the antisymmetric and symmetric variety. The electrostatic voltage sensitivity, as measured in a SAW (surface acoustic wave) oscillator configuration, was double that of an equivalent Rayleigh device. Insertion losses, short- and long-term oscillator stability, and oscillator thermal sensitivity are reported.<<ETX>>","PeriodicalId":89469,"journal":{"name":"Proceedings. IEEE Ultrasonics Symposium","volume":"13 1","pages":"647-651 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1989-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78291287","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: 4
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