采用表面对称电极含金属芯聚偏氟乙烯(PVDF)纤维(SMPF)传感器, 代替人体纤毛细胞感受器, 设计制备了一种仿生半规管。根据压电方程和密度差理论, 建立仿生半规管的密度差感知机理理论模型。搭建了实验系统, 测试了传感器对仿生内淋巴液与仿生壶腹嵴之间密度差变化的感知功能。实验结果表明, 仿生壶腹嵴传感器在液体压力作用下可以产生相应的变形, 并且不同密度差下的响应幅值不同, 同时验证了人体半规管中, 当密度差足够大时, 半规管具有对直线加速度产生反应的能力。

A kind of bionic semicircular canal was designed and fabricated by using the surface symmetrical electrode with metal core polyvinylidene fluoride (PVDF) fiber (SMPF) sensor instead of human ciliated cell receptor. According to the piezoelectric equation and the density difference theory, the theoretical model of density difference sensing mechanism of bionic semicircular canal was established. An experimental system was built to test the sensing function of the sensor to the density difference between the bionic endolymph and the bionic ampullary crest. The experimental results show that the bionic ampullary crest sensor can produce corresponding deformation under the action of liquid pressure, and the response amplitude is different under different density difference. At the same time, it is verified that the semicircular canals have the ability to respond to linear acceleration when the density difference is large enough in the semicircular canals of the human body.