人工壶腹嵴加速度传感器的设计、制备及传感特性研究
发布时间：2019-06-21 00:27
【摘要】：人体半规管是人体内耳前庭系统中的重要组成部分,由三个半圆形小管构成,并且这三个半圆形小管相互垂直。人体半规管内部和外部都充满了淋巴液。当人体运动时,由于惯性,人体半规管内部的淋巴液将会反方向流动。人体壶腹嵴在人体半规管底端的壶腹中,并且在其内部有毛细胞,毛细胞包裹在明胶状的物体中组成了人体壶腹嵴顶。人体半规管内部淋巴液的移动将会导致壶腹嵴顶活动,激励了毛细胞,如此人体半规管就能够感应空间中每个方向的运动。本文针对人体半规管展开初步探索,模仿人体半规管对运动的感知原理,制备了人工壶腹嵴加速度传感器,其主要研究内容如下:(1)本文在制备成功的含金属芯PVDF压电纤维表面涂镀对称电极,极化后制备出表面对称电极含金属芯PVDF压电纤维,即SMPF(Symmetric electrodes metal core PVDF fiber)来模仿人体毛细胞,本文用硅橡胶代替人体壶腹嵴中的胶状物质。(2)将硅橡胶和SMPF埋入自制模具中,制备出人工壶腹嵴加速度传感器,将其一端固定在激振器上,一端自由,建立悬臂梁结构的人工壶腹嵴加速度传感器在气体中的振动传感模型,推导其产生的振动传感电荷与振幅、频率之间的关系,以激光位移传感器所采集的位移信号为参照。并搭建了实验平台,检测了人工壶腹嵴加速度传感器的振动传感性能,实验结果表明,人工壶腹嵴加速度传感器能够感知振幅大小,并且具备较高的灵敏度。(3)采用3D打印的方法打印出直线型人工半规管,并在直线型人工半规管中注满液体,将人工壶腹嵴加速度传感器一端固定在直线型人工半规管内壁,另一端悬浮在液体中,呈悬臂梁结构,建立悬臂梁结构的人工壶腹嵴加速度传感器在液体中的振动传感模型。搭建实验平台,对人工壶腹嵴加速度传感器在液体中的振动传感性能进行了测试研究。(4)通过实验研究表明,人工壶腹嵴加速度传感器具有良好的振动传感性能,且经过扫频实验检测到人工壶腹嵴加速度传感器的固有频率低于10Hz,在人体运动范围内,可以用于人体头部的运动检测,在未来也可以用于人体前庭系统结构和功能的模型制作。
[Abstract]:Human semicircular canal is an important part of human inner ear vestibule system, which is composed of three semicircular tubules, and these three semicircular tubules are perpendicular to each other. The body's semicircular canal is filled with lymphoid fluid both inside and outside. When the body moves, due to inertia, the lymph inside the semicircular canal will flow in the opposite direction. The ampullary crest of the human body is in the ampulla of the bottom of the semicircular canal, and there are hair cells in it, which are wrapped in gelatin-shaped objects to form the top of the ampullary crest of the human body. The movement of lymphoid fluid in the semicircular canal of the human body will lead to the movement of the ampullary crest and stimulate the hair cells, so that the semicircular canal of the human body can sense the movement in every direction in space. In this paper, the artificial ampullary crest acceleration sensor was prepared by imitating the sensing principle of human semicircular canal to the motion of human semicircular canal. The main research contents are as follows: (1) in this paper, the surface symmetric electrode containing metal core PVDF piezoelectric fiber was prepared by coating symmetrical electrode on the surface of PVDF piezoelectric fiber with metal core, that is, SMPF (Symmetric electrodes metal core PVDF fiber) to mimic human hair cells. In this paper, silicone rubber is used instead of colloidal substance in human ampullary crest. (2) the artificial ampullary crest acceleration sensor is prepared by embedding silicone rubber and SMPF into the self-made mould. One end of the artificial ampullary crest acceleration sensor is fixed on the exciter and the other end is free. The vibration sensing model of the artificial ampullary crest acceleration sensor with cantilever structure in gas is established, and the relationship between the vibration sensing charge and amplitude and frequency is deduced. The displacement signal collected by laser displacement sensor is used as reference. The experimental platform is built to detect the vibration sensing performance of the artificial ampullary crest accelerometer. The experimental results show that the artificial ampulla acceleration sensor can sense the amplitude and has high sensitivity. (3) the linear artificial semicircular canal is printed out by 3D printing, and the linear artificial semicircular canal is filled with liquid. One end of the artificial ampullary crest acceleration sensor is fixed on the inner wall of the linear artificial semicircular canal and the other end is suspended in liquid. The vibration sensing model of the artificial ampullary crest acceleration sensor with cantilever structure in liquid is established. The vibration sensing performance of artificial ampullary crest acceleration sensor in liquid was tested and studied on the experimental platform. (4) the experimental results show that the artificial ampullary crest acceleration sensor has good vibration sensing performance, and the natural frequency of artificial ampullary crest acceleration sensor is less than 10Hz, which can be used to detect the head motion of human body in the range of human motion. In the future, it can also be used to model the structure and function of human vestibule system.
【学位授予单位】：扬州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212
，
本文编号：2503642
[Abstract]:Human semicircular canal is an important part of human inner ear vestibule system, which is composed of three semicircular tubules, and these three semicircular tubules are perpendicular to each other. The body's semicircular canal is filled with lymphoid fluid both inside and outside. When the body moves, due to inertia, the lymph inside the semicircular canal will flow in the opposite direction. The ampullary crest of the human body is in the ampulla of the bottom of the semicircular canal, and there are hair cells in it, which are wrapped in gelatin-shaped objects to form the top of the ampullary crest of the human body. The movement of lymphoid fluid in the semicircular canal of the human body will lead to the movement of the ampullary crest and stimulate the hair cells, so that the semicircular canal of the human body can sense the movement in every direction in space. In this paper, the artificial ampullary crest acceleration sensor was prepared by imitating the sensing principle of human semicircular canal to the motion of human semicircular canal. The main research contents are as follows: (1) in this paper, the surface symmetric electrode containing metal core PVDF piezoelectric fiber was prepared by coating symmetrical electrode on the surface of PVDF piezoelectric fiber with metal core, that is, SMPF (Symmetric electrodes metal core PVDF fiber) to mimic human hair cells. In this paper, silicone rubber is used instead of colloidal substance in human ampullary crest. (2) the artificial ampullary crest acceleration sensor is prepared by embedding silicone rubber and SMPF into the self-made mould. One end of the artificial ampullary crest acceleration sensor is fixed on the exciter and the other end is free. The vibration sensing model of the artificial ampullary crest acceleration sensor with cantilever structure in gas is established, and the relationship between the vibration sensing charge and amplitude and frequency is deduced. The displacement signal collected by laser displacement sensor is used as reference. The experimental platform is built to detect the vibration sensing performance of the artificial ampullary crest accelerometer. The experimental results show that the artificial ampulla acceleration sensor can sense the amplitude and has high sensitivity. (3) the linear artificial semicircular canal is printed out by 3D printing, and the linear artificial semicircular canal is filled with liquid. One end of the artificial ampullary crest acceleration sensor is fixed on the inner wall of the linear artificial semicircular canal and the other end is suspended in liquid. The vibration sensing model of the artificial ampullary crest acceleration sensor with cantilever structure in liquid is established. The vibration sensing performance of artificial ampullary crest acceleration sensor in liquid was tested and studied on the experimental platform. (4) the experimental results show that the artificial ampullary crest acceleration sensor has good vibration sensing performance, and the natural frequency of artificial ampullary crest acceleration sensor is less than 10Hz, which can be used to detect the head motion of human body in the range of human motion. In the future, it can also be used to model the structure and function of human vestibule system.
【学位授予单位】：扬州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212
，
本文编号：2503642
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