智能电气阀门定位器的设计

发布时间：2018-07-03 00:45

本文选题：智能阀门定位器 + ARM　；参考：《南昌大学》2011年硕士论文

【摘要】：阀门定位器作为气动调节阀的主要附件之一,可以改善调节阀特性、提高定位的精度和内设参数可选择增加了控制的灵活性。目前定位器研究的热点主要是智能电气阀门定位器,国外一些大公司：如西门子SIEMENS、费希尔—罗斯蒙特Fisher-Rosemount等已相继推出智能阀位定位器产品。国内在这方面起步较晚。国内目前普遍使用的阀门定位器采用的是机械式力平衡原理,存在一些问题,而由国外进口的智能型定位器价格昂贵。因此研究设计智能电气阀门定位器是十分必要的。本文通过分析定位器的原理,明确当前工业过程控制对阀门定位器的基本要求,同时结合国内、外典型智能阀门定位器产品结构与功能,研究开发了一种基于32位的ARM7系列中的LPC2290微处理器的新型智能电气阀门定位器。本论文主要完成了以下几方面研究工作： 1.在分析国内、外智能阀门定位器产品结构的基础上,明确定位器硬件设计要求,完成了以微处理器LPC2290为核心的定位器硬件电路设计,其中包括微处理器硬件资源分配、电源电路、电流信号检测电路、阀位检测电路、AD转换电路、压电阀驱动电路、按键与显示电路的设计。同时完成了对各个硬件电路的调试与驱动程序的编写。 2.在分析国内、外智能阀门定位器产品功能的基础上,明确本文的功能需求,针对需完成的功能编写定位器软件程序。其中包括定位器人机界面监控程序、初始化程序及控制算法的编写。 3.分析被控对象空载下的特性,针对被控对象特性提出相应的控制算法,通过闭环实验验证本文提出的控制算法阀位控制效果良好,并与国内的乐清市自动化仪表九厂生产的SEPP4000智能阀门定位器的阀位控制效果进行比较,实验结果表明,本文提出的阀位控制算法效果更佳。
[Abstract]:As one of the main accessories of the pneumatic control valve, the valve positioner can improve the characteristics of the control valve, improve the positioning accuracy and increase the flexibility of control by selecting the internal parameters. At present, the research focus of positioner is mainly intelligent electric valve positioner. Some large foreign companies, such as Siemens Siemens, Fisher Rosemount and so on, have introduced intelligent valve positioner products one after another. China started late in this area. The mechanical force balance principle is widely used in the valve positioner in our country, which has some problems, but the intelligent positioner imported from abroad is expensive. Therefore, it is necessary to study and design the intelligent electric valve positioner. By analyzing the principle of the positioner, this paper clarifies the basic requirements of the current industrial process control for the valve positioner, and at the same time combines the structure and function of the typical intelligent valve positioner at home and abroad. A new type of intelligent electrical valve positioner based on LPC2290 microprocessor in 32 bit ARM7 series is developed. This paper mainly completed the following research work: 1. Based on the analysis of domestic and external intelligent valve positioner product structure, the hardware design requirements of locator are clarified, and the hardware circuit design of locator based on microprocessor LPC2290 is completed, including the allocation of microprocessor hardware resources. Power circuit, current signal detection circuit, valve position detection circuit AD conversion circuit, piezoelectric valve drive circuit, key and display circuit design. At the same time completed the debugging of each hardware circuit and driver programming. 2. On the basis of analyzing the functions of domestic and foreign intelligent valve positioner products, the functional requirements of this paper are clarified, and the software program of locator is written for the functions to be completed. Including positioner man-machine interface monitoring procedures, initialization procedures and control algorithms. 3. Based on the analysis of the characteristics of the controlled object under no load, the corresponding control algorithm is proposed. The closed-loop experiment proves that the control algorithm proposed in this paper has a good effect on the valve position control. Compared with the valve position control effect of SEPP4000 intelligent valve positioner produced by Yueqing automatic instrument Factory in China, the experimental results show that the effect of valve position control algorithm proposed in this paper is better.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH134

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