Design, Preparation And Sensing Characteristics Of Artificial Ampullary Acceleration Sensor

Human semicircular canal is an important part of the vestibular system in human body,which consists of three small semicircular tubes,and the three semicircle tubes are perpendicular to each other.The human internal and external semicircular canals are filled with the lymph.When human body moves,with the effect of inertia,the lymph in the semicircular canal will flow reversely.Human crista ampullaris are at the bottom of the semicircular canal in the pot belly of the human body,where its inner hair cells were wrapped by gelatin and consist of human crista ampullaris roof.Human internal lymph in semicircular canal will move and lead to crista ampullaris are kinetic,which motivate hair cells,so human semicircular canal can be induced to move in each direction.This paper will explore a preliminary study on human semicircular canal,which imitates how human semicircular canal perceive the movement principle,complete artificial crista ampullaris acceleration sensor.The main research content is as follows:(1)This paper successfully completes to plate the symmetric electrodes on the surface of the metal core PVDF piezoelectric fiber,after which,symmetry polarization containing metal core PVDF piezoelectric fiber is produced,namely SMPF(Symmetric electrodes metal core PVDF fiber)to mimic the hair cells.(2)Burying the silicone rubber and SMPF homemade mold,producing artificial crista ampullaris acceleration sensor,and fixing its one end on the vibrator,free at another end,then building artificial crista ampullaris of the cantilever beam structure acceleration sensor in the gas sensing model,capturing the relationship of produced vibration sensing charge between the amplitude,frequency and vibration sensor.Signals collected by laser displacement sensor displacement are for reference.And setting up the experimental platform to test the vibration sensing properties of artificial crista ampullaris acceleration sensor and the experimental results show that the artificial crista ampullaris acceleration sensor can sense the amplitude and have higher sensitivity.(3)Using 3D printing method to print out linear artificial canal,and filling with liquid in the linear artificial canal,and fixing the artificial crista ampullaris acceleration sensor on the inner wall of the linear artificial canal.The cantilever will show the beam structure,after which,establishing a model of the cantilever beam structure of the artificial crista ampullaris acceleration sensor in liquid vibration sensor.Setting up the experimental platform and testing the artificial crista ampullaris acceleration sensor in liquid vibration sensing properties.(4)Through experimental research,it shows that artificial crista ampullaris acceleration sensor has obvious vibration sensing ability,and through the frequency sweep experiment,the natural frequency of the sensor below 10 hz is measured.Within the scope of the human body movement,the head motion detection can be used in the human body,and in the future this can also be used in the model of the human body vestibular system of structure and function.