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요약정보
cMUT阵元的声学分析与环形扫描成像 / Sound analysis of cMUT element and circular scanning imaging
Resource Type
Academic Journal
Authors
高鹏飞
;
何常德
;
张彦军
;
张文栋
;
王红亮
;
任勇峰
;
党荣
;
李一凡
;
王子渊
;
孟亚楠
;
沈姝君
;
GAO Pengfei
;
HE Changde
;
ZHANG Yanjun
;
ZHANG Wendong
;
WANG Hongliang
;
REN Yongfeng
;
DANG Rong
;
LI Yifan
;
WANG Ziyuan
;
MENG Yanan
;
SHEN Shujun
Source
应用声学 / Journal of Applied Acoustics
. 41(2):293-300
Subject
电容式微机械超声换能器;声场;指向性;轴向声压;环形扫描成像
Language
Chinese
ISSN
1000-310X
Online Access
Find it @ DONGA
초록
电容式微机械超声换能器(cMUT)具有宽带宽、灵敏度高、机械阻抗低和与电子电路集成制造等优点.由于超声换能器声场设计的好坏决定了成像质量的优劣,为了明确阵元参数与辐射声场的关系,该文对不同的阵元参数进行了计算仿真.与压电陶瓷超声换能器的结构不同,cMUT阵元是由多个电容单元(cell)并联构成.因此分析了cell的半径、cell数量、间距、振动频率等阵元参数与辐射声场分布、远近场分界点、辐射声压、指向性的关系,并进行了声轴声压与指向性实验测试验证.理论与实验测试结果基本一致.通过仿真计算,选用一种已制备的指向性强、发射性能好的cMUT单阵元器件对鸡骨进行了环形扫描和成像,实现了对生物体组织横截面的超声CT成像,验证了所制备的cMUT器件的可用性.此研究对工业与医学成像领域具有重要的参考价值.
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