Limited-Diffraction-Beam Ultrasound Transducers of Conical Type with Enhanced Time Resolution Fabricated Using a Functionally Graded Piezocomposite
スポンサーリンク
概要
- 論文の詳細を見る
A new approach for enhancing the resolution capability of an ultrasound transducer in both axial and lateral directions is presented. A functionally graded piezoelectric composite of 1–3 connectivity is newly devised and applied to a weighted conical transducer. In this piezocomposite material, an electric field for wave excitation is effectively graded in the thickness direction, and this makes it possible to launch an almost single-pulse ultrasonic wave. Because of flexibility, this composite material can be formed easily into a conical shape and enhances the time resolution of the conical transducer that possesses good lateral resolution over a large depth. The experimental results obtained for the fabricated transducer show the capability of launching a short ultrasonic pulse and creating a focused field over a large depth.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2003-08-15
著者
-
Nakamura Kiyoshi
Department Of Chemistry Faculty Of Science Shinshu University
-
Yamada Ken
Department Of Applied Chemistry Faculty Of Science And Technology Keio University
-
Ohkubo Atsunori
Department of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University, 05 Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8579, Japan
関連論文
- ZnO Film Growth on(0112)LiTaO_3 by Electron Cyclotron Resonance-Assisted Molecular Beam Epitaxy and Determination of Its Polarity
- Functionally Graded Broadband Ultrasound Transducer Created by Forming an Internal Temperature Gradient : Instrumentation, Measurement, and Fabrication Technology
- A Functionally Graded Piezoelectric Material Created by an Internal Temperature Gradient : Electrical Properties of Condensed Matter
- Potential of Zero Charge of a Molybdenum Electrode by Laser Ablation Voltammetry
- Equivalent Network Analysis of Functionally Graded Piezoelectric Transducers
- Growth of ZnO Thin Films on LiNbO_3 Substrates by Electron Cyclotron Resonance-Assisted Molecular Beam Epitaxy
- Equivalent Network Representation for Thickness Vibration Modes in Piezoelectric Plates with an Exponentially Graded Parameter
- Broadband Transducers Using Effectively Graded Piezoelectric Plates for Generation of Short-Pulse Ultrasound
- Light Emission from Organic Single-Crystal Field-Effect Transistors
- UHF Bulk-Acoustic-Wave Filters Utilizing Thin ZnO/SiO_2-Diaphragms on Silicon
- Torsional Actuators Using LiNbO_3 Plates with an Inversion Layer
- Single-Crystalline Zn0 Films Grown on (0001)A1_20_3 Substrate by Electron Cyclotron Resonance-Assisted Molecular Beam Epitaxy Technique
- Propagation Characteristics of Surface Acoustic Waves in ZnO/LiNbO_3 Structures
- Epitaxial Growth of ZnO Films on (0001) Sapphire at Low Temperatures by Electron Cyclotron Resonance-assisted Molecular Beam Epitaxy and Their Microstructural Characterizations
- Equivalent Circuit of Interdigital Transducers Based on Coupling-of-Modes Theory Considering Electrode Resistivity and Propagation Loss
- Pyroelectric IR Detectors Using Periodic Inverted Domaims of LiTaO_3 ( FERROELECTRIC MATERIALS AND THEIR APPLICATIONS)
- Total Synthesis of Antibiotic (-)-Oudemansin X Utilizing L-Quebrachitol as a Chiral Pool
- Characteristics of a Discretely Weighted Conical Transducer for Generation of Limited Diffraction Beams
- Theoretical Study on Discretely Weighted Comical Tansducers
- Clinical experience with ureterolithotripsy using the Lithoclast
- Analysis of Piezoelectric Thin Film Resonators with Acoustic Quarter-Wave Multilayers
- Proximity Sensors Utilizing an Evanescent Acoustic Field Formed by a Piezoelectric Bending Vibrator
- Variable aperture conical transducer
- New Ultrasonic Level Gauge Using Standing Waves of Bending Modes
- Temperature Dependence of Zero Offset of Piezoelectric-Ceramic Cylinder Vibratory Gyroscope
- Theoretical Evaluation of SAW Velocity Measured by Divergent-Beam Ultrasound Transducers : SAW and Communication Device
- Some Modifications of Toroidal Long-Range-Focusing Transducer for Sidelobe Reduction : Ultrasonic Transduction
- A Piezoelectric Single-Plate Bending Vibrator Using Interdigital Electrodes : V: PIZOELECTRIC VIBRATOR
- Fabrication of Piezoelectric Thin Film Resonators with Acoustic Quarter-Wave Multilayers
- Scanning Nonlinear Dielectric Microscope Using a Lumped Constant Resonator Probe and Its Application to Investigation of Ferroelectric Polarization Distributions
- Bending Vibrator Consisting of a LiNbO_3 Plate with a Ferroelectric Inversion Layer : P: Pyroelectrics
- Planar Ultrasonic Transducers Using LiTaO_3 Poled with Interdigital Electrodes : SAW and Communication Devices
- Trapped-Energy Vibratory Gyroscopes Using Rotated Y-cut LiNbO_3
- Propagation Characteristics of Leaky Surface Acoustic Waves and Surface Acoustic Waves on LiNbO_3 Substrates with a Ferrroelectric Inversion Layer
- Characteristics of a Conical Piezocomposite Transducer with an Apodized Vibration Area
- Fabrication of Weighted Conical Transducer for Generation of Quasi-Nondiffracting Beam
- Theoretical analysis of planar ultrasonic transducers using piezoelectric ceramics poled with interdigital electrodes
- Equivalent Network Representation for a Liquid-Level Sensor Operating in Trapped-Energy-Mode Thickness Vibration
- Organic Field-Effect Transistor of (Thiophene/Phenylene) Co-Oligomer Single Crystals with Bottom-Contact Configuration
- Liquid-Level Sensing by Trapped-Energy-Mode Thickness Vibration
- Limited-Diffraction-Beam Ultrasound Transducers of Conical Type with Enhanced Time Resolution Fabricated Using a Functionally Graded Piezocomposite
- Variation of Bending-Vibrator Characteristics when an Object is Brought into Close Proximity with the Vibrator End
- Growth of KNbO3 Films by Electron-Cyclotron-Resonance-Assisted Pulsed Laser Deposition
- Light Emission from Organic Single-Crystal Field-Effect Transistors
- Growth of ZnO Thin Films on LiNbO3 Substrates by Electron Cyclotron Resonance-Assisted Molecular Beam Epitaxy
- Isolation of P1cinC(+) and P1cinC(-) mutants and detection of their polypeptides involved in host specificity.
- Analysis of Piezoelectric Thin Film Resonators with Acoustic Quarter-Wave Multilayers
- Basic Study on Proximity Sensors Utilizing Air-Film Damping Effect Caused by Longitudinal-Mode Piezoelectric Vibrator