基于压电陶瓷的数字化微注射技术理论及其应用研究

发布时间：2018-03-02 09:21

本文关键词： 一次逆压电效应二次正压电效应微流量自感知执行器　出处：《黑龙江大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前广泛采用的数字化微注射系统在进行微流量注射时,多采用手动操作或基于压电陶瓷的一次逆压电效应原理进行定位、注射,存在着控制精度低及系统结构比较复杂等缺点。因此研究在操作上简单方便、在精度控制上准确的数字化微流量注射装置成为发展生物工程的一个重要途径。本课题来源于史丽萍教授的哈尔滨工业大学机器人技术与系统国家重点实验室开放研究项目(项目编号:SKLRS-2015-MS-10)和黑龙江省教育厅的科学技术研究项目(项目编号:12541624)。本文主要内容是基于压电陶瓷的数字化微注射理论及其应用研究,通过理论和实验对压电陶瓷的一次逆、二次正压电效应进行分析,并利用其原理设计出自感知数字化微注射结构,主要包括两方面内容:基于一次逆、二次正压电效应自感知执行器的理论研究和自感知微注射装置的设计。首先,本文在经典压电学基础理论的研究上,对压电陶瓷特性、压电方程分析、边界条件关系进行介绍,针对压电陶瓷在不同的机械和电学边界条件下的各次压电效应现象理论分析。然后基于压电陶瓷的一次逆、二次正压电效应理论原理来建立以PZT-5压电陶瓷为实验对象的实验结构,测量实验对象压电陶瓷被施加外电压的时候在一次逆压电效应下产生的位移值;设计实验结构对二次正压电效应产生的电荷进行分离和解耦来实现在同一压电陶瓷上传感器与执行器的集成。将实验实际测量的输出值与固定公式计算出的理论值进行对比分析,验证理论的正确性及实验结构方案设计的可行性。最后,根据上述理论研究与实验结果,设计出基于一次逆、二次正压电效应的数字化微注射装置。通过压电陶瓷在一次逆压电效应作用推动注射器推杆实现流体流出,从而将一次逆位移量转化为注射量;同时压电体的二次正压电效应自感知此注射量,实现自感知微注射。对整体方案进行设计并通过合理性实验验证。
[Abstract]:The digital microinjection system, which is widely used at present, usually uses manual operation or the principle of primary inverse piezoelectric effect based on piezoelectric ceramics to locate and inject. There are some disadvantages such as low control precision and complex system structure. Therefore, the research is simple and convenient in operation. An accurate digital micro-flow injection device in precision control has become an important way to develop bioengineering. This subject comes from Professor Shi Liping's State key Laboratory of Robotics and Systems of Harbin University of Technology and Technology. The R & D project (project number: SKLRS-2015-MS-10) and the science and technology research project of Heilongjiang Provincial Education Department (item No.: 12541624). The main content of this paper is the research of digital microinjection theory based on piezoelectric ceramics and its application. The primary inverse and secondary positive piezoelectric effects of piezoelectric ceramics are analyzed in theory and experiment, and the self-sensing digital microinjection structure is designed by using its principle, which mainly includes two aspects: based on the primary inversion, Theoretical study of Self-sensing Actuator with Quadratic positive piezoelectric effect and Design of Self-sensing Microinjection device. Firstly, the characteristics of piezoelectric ceramics, the analysis of piezoelectric equations, and the relationship between boundary conditions and the properties of piezoelectric ceramics are introduced in this paper. In this paper, the phenomena of piezoelectric effect under different mechanical and electrical boundary conditions are analyzed theoretically. Based on the theory of quadratic positive piezoelectric effect, the experimental structure of PZT-5 piezoelectric ceramics is established, and the displacement of the piezoelectric ceramics under the first inverse piezoelectric effect is measured when the external voltage is applied to the experimental object. The experimental structure was designed to separate and decouple the charge generated by the secondary positive piezoelectric effect to realize the integration of sensors and actuators on the same piezoelectric ceramics. Values are compared and analyzed, The correctness of the theory and the feasibility of the design of the experimental structure are verified. Finally, based on the above theoretical research and experimental results, the primary inverse is designed. A digital microinjection device with secondary positive piezoelectric effect. Through the action of piezoelectric ceramics in the primary inverse piezoelectric effect, the putter of the syringe is promoted to realize the fluid flow out, thus the primary inverse displacement is converted into the injection volume. At the same time, the quadratic positive piezoelectric effect of piezoelectric body self-perceives the injection volume and realizes the self-sensing micro-injection. The whole scheme is designed and verified by the rationality experiment.
【学位授予单位】：黑龙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ174.1

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