仿生耳石器的冲击与振动传感特性研究

Study on Shock and Vibration Sensing Characteristics of a Bionic Otoliths

为了研究人体耳石器官的冲击与振动传感特性,本文根据人体耳石器官的生理结构,采用表面对称电极含金属芯PVDF压电纤维(SMPF)作为元件,设计制备了仿生耳石器。根据压电方程和振动理论,建立了仿生耳石器的冲击和振动传感理论模型。搭建实验平台,测试了仿生耳石器的振动传感功能。实验结果证明,在冲击与振动的作用下,仿生耳石器中的液体使耳石器内的囊斑发生形变,通过SMPF产生的电荷信号,可以感知受到冲击和振动的波形、频率和振幅。实验结果验证了理论模型,同时证明了人体耳石器具有感知直线加速度的幅值和角度的特性。

In order to study the shock and vibration sensing characteristics of human otolith organs,according to the physiological structure of human otolith organs,bionic otoliths were designed and prepared by using surface-symmetric electrodes with metal core PVDF piezoelectric fibers(SMPF)as components.According to the piezoelectric equation and vibration theory,the theoretical model of impact and vibration sensing of the bionic otolith is established.An experimental platform was built to test the vibration sensing function of the bionic otolith.The experimental results prove that under the action of shock and vibration,the liquid in the bionic otolith deforms the cysts in the otolith,and the charge signal generated by SMPF can sense the waveform,frequency and amplitude of the shock and vibration.The experimental results validate the theoretical model and prove that the human otolith has the characteristics of sensing the amplitude of linear acceleration and the angle change of the otolith.