人工中耳悬浮式压电振子的优化设计

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (5) : 135-140.

论文

人工中耳悬浮式压电振子的优化设计

为了优化人工中耳悬浮式压电振子的植入效果，设计了一种位移放大结构用于改善振子的输出特性。首先采用微CT扫描和逆向成型技术建立了包括外耳道、中耳和简化耳蜗的人耳有限元模型，通过与文献的实验数据比对验证模型的有效性。然后建立人耳与悬浮振子的耦合力学模型，通过有限元的耦合场分析研究加入位移放大结构前后的人工中耳植入效果。研究结果表明，采用位移放大结构后，振子于中高频段的等效声压级得到明显提升，可以有效降低压电振子的功耗。

作者信息 +

Optimization design of floating mass type piezoelectric actuator for implantable middle ear hearing devices

To optimize the implantable performance of the floating mass type piezoelectric actuator for implantable hearing devices, a displacement amplifier was designed to improve the out characteristics of the actuator. Firstly, a finite element model of the human ear consisting of the external ear canal, middle ear and simplified cochlea was constructed via micro-computer tomography imaging and reverse engineering. The validity of the model was completed through comparing the model-derived results with experimental data. Then an ear-actuator coupled mechanical model was developed, and the multi-field coupling was used to study the implantable performance of the actuator before and after the displacement amplifier was considered. The results showed that the adoption of the displacement amplifier could increase the equivalent sound pressure level of the actuator in the middle and high frequency range, and the power consumption could effectively be reduced at the same time.

Author information +

文章历史 +

摘要

为了优化人工中耳悬浮式压电振子的植入效果，设计了一种位移放大结构用于改善振子的输出特性。首先采用微CT扫描和逆向成型技术建立了包括外耳道、中耳和简化耳蜗的人耳有限元模型，通过与文献的实验数据比对验证模型的有效性。然后建立人耳与悬浮振子的耦合力学模型，通过有限元的耦合场分析研究加入位移放大结构前后的人工中耳植入效果。研究结果表明，采用位移放大结构后，振子于中高频段的等效声压级得到明显提升，可以有效降低压电振子的功耗。

Abstract

To optimize the implantable performance of the floating mass type piezoelectric actuator for implantable hearing devices, a displacement amplifier was designed to improve the out characteristics of the actuator. Firstly, a finite element model of the human ear consisting of the external ear canal, middle ear and simplified cochlea was constructed via micro-computer tomography imaging and reverse engineering. The validity of the model was completed through comparing the model-derived results with experimental data. Then an ear-actuator coupled mechanical model was developed, and the multi-field coupling was used to study the implantable performance of the actuator before and after the displacement amplifier was considered. The results showed that the adoption of the displacement amplifier could increase the equivalent sound pressure level of the actuator in the middle and high frequency range, and the power consumption could effectively be reduced at the same time.

导出引用

田佳彬?1，饶柱石1，塔娜1，许立富1. 人工中耳悬浮式压电振子的优化设计[J]. 振动与冲击, 2015, 34(5): 135-140

Jiabin Tian1, Zhushi Rao1, Na Ta1, Lifu Xu1 . Optimization design of floating mass type piezoelectric actuator for implantable middle ear hearing devices[J]. Journal of Vibration and Shock, 2015, 34(5): 135-140

参考文献

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