弹性支撑式压电骨传导听觉装置

发布时间：2018-05-06 04:17

本文选题：弹性支撑 + 骨传导听觉装置　；参考：《光学精密工程》2014年10期

【摘要】：提出一种以圆形轮式片状弹簧作为中间弹性支撑的新型压电骨传导听觉装置以提高它的低频响应性能。通过对听觉装置的动力学建模,理论分析了由支撑弹簧和压电振子组成的振动系统;选择厚度为0.9mm的片弹簧作为听觉装置的支撑元件,设计了圆形轮式片状支撑弹簧。最后,制作了弹性支撑式压电骨传导听觉装置的试验样机,搭建了试验测试系统,对样机的幅频特性、响频特性和噪频特性进行了试验测试。实验结果显示:当电源激励信号频率为550Hz时,压电振子的最大振动幅值可达22.21μm;中低频区域的响度为60~70dB,中高频区域的响度稳定在80dB左右;在离听觉装置1m远处测试到听觉装置的噪声大小为35~40dB。得到的数据表明:圆形中间弹性支撑式压电骨传导听觉装置具有较好的低频响应性能,其响度基本能够满足佩戴者的听力要求,近距离噪声也不大。
[Abstract]:A novel piezoelectric bone conduction hearing device with circular wheel flake spring as intermediate elastic support is proposed to improve its low frequency response. The vibration system composed of support spring and piezoelectric vibrator is theoretically analyzed through the dynamic modeling of hearing device, and the plate spring with thickness of 0.9mm is selected as the supporting element of hearing device, and the circular wheel flake support spring is designed. Finally, an experimental prototype of elastic braced piezoelectric bone conduction hearing device is made, and a test system is built. The amplitude frequency, response frequency and noise frequency characteristics of the prototype are tested. The experimental results show that the maximum vibration amplitude of the piezoelectric oscillator can reach 22.21 渭 m when the frequency of the power source excitation signal is 550Hz, the loudness of the middle and low frequency region is 600.70dB, and the loudness of the middle and high frequency region is about 80dB. At a distance of 1m from the hearing device, the noise size of the hearing device was 35 ~ 40 dB. The obtained data show that the piezoelectric bone conduction hearing device with circular intermediate elastic support has good low frequency response performance, its loudness can basically meet the hearing requirements of the wearer, and the close range noise is small.
【作者单位】：吉林大学机械科学与工程学院;浙江师范大学精密机械研究所;
【基金】：高等学校博士学科点专项科研基金资助项目(No.20110061110024) 教育部高等学校科技创新工程重大项目培育资金资助项目(No.708028) 辽宁省科学技术计划资助项目(No.2013225089)
【分类号】：TN384;R764.5

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