新型低温等离子体治疗仪的研究与开发

发布时间：2018-07-05 17:41

本文选题：低温等离子体 + 模糊PID控制　；参考：《郑州大学》2015年硕士论文

【摘要】：随着现代生物医学科技的不断发展,人们对外科手术安全性和低创伤性的要求也越来越高。理想的手术效果是能在尽可能小的创口和出血量的情况下实现手术目的,这就对有源医疗电子设备的功率控制技术水平提出了更高的要求。然而就其复杂性及技术难度而言,生物医学系统是世界上最难建模与控制的系统,所有生物系统无一例外都是非线性系统,其参数的时变性和个体间的差异是不能准确测量的,其数学模型多数无法定量描述。针对普外科手术需求,为提高低温等离子治疗设备的功率稳定性,本文综合了模糊功率控制和PID功率控制的优点,提出一种基于模糊PID控制算法的功率控制器,设计了医用低温等离子体治疗仪。经实验分析验证,低温等离子体实验组的手术时间、术中出血量以及切口长度均少于射频等离子体手术组(P0.05);低温等离子体手术组术后并发症发生率显著低于射频等离子体手术组(P0.05)。在实验应用中,低温等离子体治疗仪能够显著减少术中出血和切口长度,缩短手术时间,降低术后并发症,是安全、有效的电外科手术设备。第1章介绍了选题背景、研究意义和等离子体学科的研究现状,并对本文的主要工作进行了介绍。第2章对被控对象进行了分析,介绍了医用低温等离子体的概念、低温等离子体作用机制与工作原理。第3章介绍了等离子体治疗仪各个模块的设计过程,对功率控制等关键技术进行了重点分析。第4章借助Matlab中的Simulink和Fuzzy工具箱对模糊PID功率控制系统进行仿真分析,仿真结果表明模糊PID功率控制器比传统PID控制器具有较小的超调量,更好的动态性能和较短的调节时间。第5章对应用此功率控制算法的低温等离子治疗仪进行了实验验证和统计分析,进一步验证了其实际功率控制效果。第6章总结了全文的工作,并对今后的工作进行展望。
[Abstract]:With the development of modern biomedical science and technology, the requirements of surgical safety and low trauma are higher and higher. The ideal surgical effect is to achieve the objective of the operation under the condition of minimal wound and blood loss, which puts forward higher requirements for the power control technology level of active medical electronic equipment. However, in terms of its complexity and technical difficulty, biomedical systems are the most difficult systems in the world to model and control. All biological systems are nonlinear systems without exception. The time-varying parameters and the differences between individuals cannot be accurately measured. Most of its mathematical models can not be quantitatively described. In order to improve the power stability of low temperature plasma therapy equipment, this paper combines the advantages of fuzzy power control and pid power control, and proposes a power controller based on fuzzy pid control algorithm. A medical low temperature plasma therapeutic instrument was designed. The operation time of the experimental group with low temperature plasma was verified by experimental analysis. The amount of intraoperative bleeding and the length of incision were lower than those of radiofrequency plasma group (P0.05), and the incidence of postoperative complications in hypothermic plasma group was significantly lower than that in radiofrequency plasma group (P0.05). In the experimental application, the cryopulmonary plasma therapy instrument can significantly reduce intraoperative bleeding and incision length, shorten operation time and reduce postoperative complications. It is a safe and effective device for electrosurgical surgery. In chapter 1, the background, significance and research status of plasma are introduced, and the main work of this paper is introduced. In chapter 2, the controlled object is analyzed, and the concept, mechanism and working principle of medical low temperature plasma are introduced. In chapter 3, the design process of each module of plasma therapy instrument is introduced, and the key technologies such as power control are analyzed. In chapter 4, the fuzzy pid power control system is simulated and analyzed by using Simulink and Fuzzy toolbox in Matlab. The simulation results show that the fuzzy pid power controller has less overshoot, better dynamic performance and shorter adjusting time than the traditional pid controller. In chapter 5, the experimental verification and statistical analysis of the low temperature plasma therapy instrument using this power control algorithm are carried out, and the actual power control effect is further verified. Chapter 6 summarizes the work of this paper and looks forward to the future work.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH789

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