新型人工中耳压电振子设计

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (7) : 112-115,.

论文

新型人工中耳压电振子设计

刘后广; 塔娜; 饶柱石

作者信息 +

Design of a new type of piezoelectric actuator for middle ear implant

LIU Hou-guang; TA Na; RAO Zhu-shi

Author information +

文章历史 +

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90 dB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。

Abstract

A piezoelectric stack actuator for incus driving type middle ear implant was proposed and designed. To aid the design process, a coupling mechanics model of the human middle ear and the piezoelectric stack actuator was constructed. This model was build based on a complete set of computerized tomography section images of a healthy volunteer’s left ear by reverse engineering technology. The result shows that the stapes footplate displacement stimulated by the designed piezoelectric stack actuator’s excitation at 10.5 V rms was equivalent to that from acoustic stimulation at 90 dB SPL, which is adequate stimulation to the ossicular chain. The corresponding power consumption is 0.03 mW per volt of excitation at 1 kHz, which is low enough for the actuator to be used in a middle ear implant.

导出引用

刘后广;塔娜;饶柱石. 新型人工中耳压电振子设计[J]. 振动与冲击, 2011, 30(7): 112-115,

LIU Hou-guang;TA Na;RAO Zhu-shi. Design of a new type of piezoelectric actuator for middle ear implant[J]. Journal of Vibration and Shock, 2011, 30(7): 112-115,