CAJ | 학술논문

为研究人工中耳惯性压电悬浮振子的驱动电压特性,首先建立中耳的有限元模型,其可靠性通过实验对比得以验证;再利用该中耳有限元模型分析了振子绑定装置处的位移阻抗特性,并基于此建立听骨链与绑定装置的等效力学模型;最终建立听骨链与惯性压电悬浮振子的耦合力学模型,分析了其所需驱动电压特性.研究结果表明,振子所需驱动电压随着频率的增大而减小,在语音频段,所需最大驱动电压为20.9 V;在感音神经性听力损伤多发生的中高频段,该驱动电压不高于3.8 V,满足人工中耳低电压、低能耗的要求.
위연구인공중이관성압전현부진자적구동전압특성,수선건립중이적유한원모형,기가고성통과실험대비득이험증;재이용해중이유한원모형분석료진자방정장치처적위이조항특성,병기우차건립은골련여방정장치적등효역학모형;최종건립은골련여관성압전현부진자적우합역학모형,분석료기소수구동전압특성.연구결과표명,진자소수구동전압수착빈솔적증대이감소,재어음빈단,소수최대구동전압위20.9 V;재감음신경성은력손상다발생적중고빈단,해구동전압불고우3.8 V,만족인공중이저전압、저능모적요구.
To study the needed driving voltage of inertial piezoelectric actuator of implantable middle ear hearing devices,a finite element model of middle ear was constructed first,and the validity of this model was confirmed by comparing the motion of stapes footplate obtained by this model with experimental measurement.Then the displacement impedance of the incus long process was analyzed and a single mass-spring-damper equivalent model of the ossicular chain attached with the clamp was developed.At last,a simplified coupling model of ossicular chain and the inertial piezoelectric actuator was established and used to analyze the driving voltage property of the actuator.The result showed that the lower the frequency the lager the needed driving voltage.The maximum needed driving voltage is 20.9 V in the voice frequency domain.While in the mid-high frequency where most sensorineural hearing loss occurred, the needed driving voltage was less than 3.8 V,meeting the requirement of low voltage and low consumption.