An Focusing Method in an High Acoustic Impedance Materials Using Arrayed Sources Distributed on the Surface of the Sample

一种利用分布在样品表面的阵列源的高声阻抗材料的聚焦方法

• 批准号: 09450040
• 负责人: MORIYA Tadashi
• 金额: $ 0.77万
• 依托单位: TOKYO METROPOLITAN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450040/
• 关键词: Ultrasonic Wave; Focusing Method; Transmission Line; Impedance; Fused Quarts Rod; 音速測定; 複素音響インピーダンス; 音速

(1)A Study for Focusing Ulitrasonic Beam in a High Impedance Materials using Transmission Line Coupler :A method for focusing an ultrasonic beam within a solid material is presented. Distributed point sources on the surface of the solid are used. The point souces are formed using the tip of an ultrasonic transmission line. A simulation study as well as experimental study was conducted. The main advantage of the method is that the spatial resolution is related to the diameter of the tip of the rod and is not limited by Rayleigh criterion.(2) A Method for Measuring Complex Acoustic Impedance :A Method for measuring complex acoustic impedance in small sample using a fused quarts rod as a transmission line is develope. The method features its simplicity and accuracy. The experimental results show that the impedance can be measured with an accuracy less than 1%.

(1)利用传输线耦合器在高阻抗材料中聚焦超声束的研究：提出了一种在固体材料中聚焦超声束的方法。采用分布在固体表面的点源。点源是利用超声波传输线的尖端形成的。进行了仿真研究和实验研究。该方法的主要优点是空间分辨率与杆尖直径有关，不受瑞利准则的限制。(2)复杂声阻抗的测量方法：研究了一种用熔融石英棒作为传输线测量小样本复杂声阻抗的方法。该方法简便、准确。实验结果表明，测量阻抗的精度小于1%。

项目成果

守屋 正,他: "伝送線路モデルを用いる微小試料の音速複素インピーダンス測定" 電子情報通信学会技報. US97-107. 1-6 (1998)

Tadashi Moriya 等人：“使用传输线模型进行微量样品的声波复阻抗测量”IEICE 技术报告1-6 (1998)。

M.Yoshizawa and T.Moriya: "A frequency sweep method for measuring sound speed of a small sample using an ultrasonic standing wave" 1998 IEEE Interenational Ultrasonic Symposium. SS-10. (1998)

M.Yoshizawa 和 T.Moriya：“使用超声波驻波测量小样本声速的频率扫描方法”1998 年 IEEE 国际超声波研讨会。

T.Moriya: "A standing wave method for measuring speed of sound and/OR complex acoustic impedance of a small sample" 23^<rd> International Symp. on Ultrasonic Imaging・・・. No.9.2 (1998)

T.Moriya：“用于测量小样本的声速和/或复声阻抗的驻波方法”23^<rd>国际超声波成像第 9.2 号（1998 年）。

T.Moriya,他: "A Simple Method for measuring complex acoustic impeclance" Proc.1998 IEEE International Ultrasonic Symp.(印刷中). (1998)

T. Moriya 等人：“测量复杂声阻抗的简单方法”Proc.1998 IEEE International Ultrasonic Symp（出版中）。

Y.Furumoto, N.Tagawa and T.Moriya: "A method for measuring complex acoustic impedance of biological tissues using a reference reflector" Annual Australasian Conference on Engineering and the PhysicalSciences in Medicine(epsm98). Nov.15-19. (1998)

Y.Furumoto、N.Takawa 和 T.Moriya：“使用参考反射器测量生物组织的复杂声阻抗的方法”澳大利亚工程和医学物理科学年度会议 (epsm98)。