摘要
提出利用压电叠堆作砧骨激励式人工中耳的振子,并利用中耳-压电叠堆耦合力学模型对该压电叠堆振子进行辅助设计。该模型基于一无任何听力损伤病史的成年志愿者的左耳,利用CT扫描和逆向成型技术建成。其可靠性通过与实验对比加以验证。最终设计的压电振子只需要10.5 V的有效驱动电压,便可以对镫骨激起相当于鼓膜处90dB声压激励的振幅。该振子在频率为1 kHz的单伏电压驱动工况下,能耗仅为0.03 mW,满足人工中耳低电压、低能耗的要求。
A piezoelectric stack actuator for incus driving type middle ear implant was proposed and designed.To aid the design,a coupled mechanical model between a human middle ear and a piezoelectric stack actuator was constructed.This model was built based on a complete set of computerized tomography section images of a healthy volunteer＇s left ear with reverse engineering technology.The result showed that the stapes footplate displacement stimulated with the designed piezoelectric stack actuator＇s excitation at 10.5 V rms is equivalent to that from acoustic stimulation at 90 dB SPL,adequate to the ossicular chain;the corresponding power consumption is 0.03 mW per volt of excitation at 1 kHz,low enough to meet the requirements of a middle ear implant.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第7期112-115,126,共5页
Journal of Vibration and Shock
基金
国家自然科学基金(10772121)
上海交通大学医工交叉研究基金(YG2007MS14)
关键词
人工中耳
压电叠堆
有限元分析
middle ear implant
piezoelectric stack
finite element analysis
