超声针灸的“针”形声场实现  

Realization of the Needle-shaped Sound Field for Ultrasonic Acupuncture

作　　者：李悦欣[1,2] 陈伟[1] 向军[1] 王华[1] 

机构地区：[1]重庆医科大学生物医学工程系,超声医学工程重庆市市级重点实验室,重庆400016 [2]重庆师范大学物理学院,重庆400012

出　　处：《压电与声光》2011年第4期590-593,653,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金重点资助项目(30830040)

摘　　要：从改进超声针灸的声场形态入手,研究了"针"形声焦域的实现。通过在凹球面压电陶瓷片分割成6个面积相等的环域,对6个环域产生的轴向声场进行离散化。为了保证在"针"形声场区域内的声场尽可能的均匀、集中,"针"形区域外的声强尽可能的低,建立了约束规划模型。采用了拉格朗日乘子约束优化方法,对模型进行优化,最终得到了想要的声场分布。计算机模拟和实验都表明,用该方法设计的"针"Starting from improving the sound field patterns of ultrasonic acupuncture, the way to achieve the needle-shaped sound field is studied. A concave spherical surface piezoelectric ceramics is separated into six equal circular domains,with diseretization of the axial sound field generated by the six-ring domain. In order to achieve axial need/e-shaped sound field and ensure uniform and concentration of sound field in needle-shaped region. Augmented Lagrange Algorithm is used to optimize the control of the six rings＇ phase,and ultimately achieve the desired sound field distribution. The distribution of needle-shaped focused sound field is conducive to accurately stimulate acupuncture points. Both the simulation and test results show that needle-shaped focused sound field can well meet the needs for ultrasonic acupuncture.

关 键 词：超声针灸 凹球壳环形阵列换能器 拉格郎日约束优化法 

分 类 号：TM282[一般工业技术—材料科学与工程] O426.2[电气工程—电工理论与新技术]