圆窗激振人工中耳压电作动器设计与实验研究  

Design and Experimental Research of Piezoelectric Actuator for Round-Window Stimulated Middle Ear Implant

作　　者：寇寅欣 王贺贺 刘后广[1] 刘耀松 周雷 黄新生 KOU Yinxin;WANG Hehe;LIU Houguang;LIU Yaosong;ZHOU Lei;HUANG Xinsheng(School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China;Dept. of Otorhinolaryngology, Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]复旦大学附属中山医院耳鼻喉科,上海200032

出　　处：《压电与声光》2021年第1期80-83,87,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(51775547);上海市科学技术委员会基金资助项目(17411962200);江苏高校优势学科建设工程基金资助项目。

摘　　要：针对现有临床上所用的圆窗激振式人工中耳作动器存在的低频增益不足,与圆窗膜尺寸不匹配及初始压力不可控的问题,结合人耳解剖结构,设计了一款带有弯张放大器的新型压电作动器。为了辅助设计该作动器,建立了作动器有限元模型及作动器-人耳耦合力学模型。基于该模型,对作动器弯张放大器、支撑弹簧、耦合杆端面的关键参数进行了优化分析。通过实验对所设计的压电作动器的频响特性、总谐波失真进行测试。结果表明,所设计的压电作动器工作频带宽,低频性能优越;最大谐波失真仅为2.36%,满足助听装置清晰度要求。To overcome the shortcomings of insufficient low-frequency gain,mismatch with the size of the round-window membrane,and uncontrollable preload of the round-window stimulated middle ear implant’s actuator used in clinical practice,a new type of piezoelectric actuator with flextensional amplifier was designed based on the anatomical structure of the human ear.In order to assist the design of the actuator,a finite element model of the actuator and a mechanical model of the actuator-human ear coupling were established.Based on this model,the key parameters of the actuator’s flextensional amplifier,support spring and coupling rod end face were optimized and analyzed.The frequency response characteristics and total harmonic distortion of the designed piezoelectric actuator were tested through experiments.The results showed that the designed piezoelectric actuator had a wide working frequency and superior low-frequency performance;the maximum harmonic distortion was only 2.36%,which meets the clarity requirements of hearing aids.

关 键 词：圆窗激振 人工中耳 压电作动器 弯张放大器 听力补偿 有限元分析 

分 类 号：TN384[电子电信—物理电子学] TM22[一般工业技术—材料科学与工程]