摘要
目的:根据骨传导原理,采用矩形压电双晶片作为声振动元件,将音讯信号转变为振动信号,经由脑颅骨刺激听神经使人产生听觉,设计压电骨传导听觉装置。方法:利用有限元对矩形压电振子进行仿真分析,提出矩形压电振子支撑方式及结构参数的优化方案,提高装置在听觉低频信号区域发声效果。对矩形压电骨传导听觉装置进行实验测试,得此结构装置的测试曲线和性能参数。结果:实验研究表明,矩形压电骨传导装置能很好实现骨传导听觉装置的功能。结论:应用仿真分析矩形压电振子的振动位移及基频、阻抗等特性结果,作为骨传导听觉装置结构尺寸的参数,所制作的样机与电磁式骨传导听觉装置对比测试表明,矩形压电双晶片的骨传导听觉装置具有效率高、结构简单的优点。
To design a piezoelectric bone conduction hearing device using rectangular piezoelectric bimorph as the vibrator to convert the audio signal into vibration in order to stimulate the auditory nerve via the skull to create hearing. The support and structure parameters were optimized by simulation analysis of the vibrator using finite element tools to improve the low frequency performance of the device. Experiments were conducted to test its performance. The presented bone conduction hearing device was capable of transferring sound signal. With the optimal parameters of the vibrator from simulation, a prototype is produced to conduct experiments in comparison with the electromagnetic bone conduction hearing device, results of which shows the advantages of the former in efficiency and structure simplicity.
出处
《医疗卫生装备》
CAS
2012年第2期11-15,共5页
Chinese Medical Equipment Journal
基金
教育部高等学校科技创新工程重大项目培育资金项目(708028)
吉林省科技发展计划项目(20070538)
关键词
骨传导
压电驱动
听觉装置
bone conduction
piezoelectric oscillator
hearing device
