基于DSP的微量计量泵控制系统设计与实现
发布时间：2018-08-29 10:28
【摘要】：微量计量泵在工厂工艺过程控制有着广泛的应用，随着控制技术及数字信息技术的不断发展，工厂自动化技术日益更新，对计量泵的精确度和稳定性的要求不断提高。国内微量计量泵研究相对于国外投入少、起步晚，微量计量泵结构和控制上都比较落后于国外。国内微量计量泵控制效果有时难以满足复杂的工厂工艺生产要求，需要从结构和控制策略上改进，使其具有较高控制精度和较好的稳定性。 本课题从控制策略上对微量计量泵控制系统进行研究和改进，对微量计量泵闭环控制算法及硬件电路和软件系统进行深入研究。以下是本课题主要研究内容： 首先，对国内外微量计量泵系统研究的基本情况进行分析介绍，分析了微量计量泵系统闭环和半闭环两种控制方案各自优缺点。由于微量计量泵流量有脉动现象不利于实现流量反馈的全闭环，因此本文采用半闭环控制方案，接着详细介绍了微量计量泵的驱动源步进电机的特点、驱动方式、控制策略。由于其模型存在非线性、滞后性、复杂性等问题，采用模糊PID实现微量计量泵的闭环控制。 其次，在硬件方面设计了以DSP2812为主控芯片的硬件电路：外扩数据存储电路、LCD12864显示电路、按键电路、报警电路等外设模块。软件上采用CCS3.3集成开发软件编写程序，利用DSP的SCI接口与上位机通信。系统接受来自上位机发送的流量控制信号，并通过流量控制器转化为步进电机所需的频率值，利用DSP的PWM模块产生频率可调的PWM信号送给步进电机驱动器，从而驱动微量计量泵运转。利用DSP的正交编码接口测出步进电机的转速反馈给控制系统，系统调用模糊PID控制算法，，实现微量计量泵流量的精确计量。软件上主要包括主程序、初始化程序、LCD12864显示程序、编码器反馈程序、闭环算法控制程序、以及通信中断服务程序等。 最后，通过RS-232接口将系统与上位机实现通信，并利用VC++6.0进行人机交互监控界面设计，实现上位机和下位机之间数据的交互和显示。
[Abstract]:Micro metering pump is widely used in plant process control. With the development of control technology and digital information technology, the automation technology of factory is updated day by day, and the requirement of accuracy and stability of metering pump is improved. Compared with foreign countries, the research on micro metering pumps in China is less and starts late. The structure and control of micro metering pumps lag behind those of foreign countries. The control effect of domestic micro metering pump is sometimes difficult to meet the complex production requirements of the factory process. It is necessary to improve the structure and control strategy to make it have higher control precision and better stability. In this paper, the control system of micro metering pump is studied and improved from the control strategy, and the closed loop control algorithm, hardware circuit and software system of micro metering pump are studied deeply. The following is the main contents of this paper: firstly, the basic research situation of micro metering pump system at home and abroad is analyzed, and the advantages and disadvantages of closed loop and semi closed loop control schemes are analyzed. Because the flow pulsation of micro metering pump is not conducive to the full closed loop of flow feedback, this paper adopts a semi closed loop control scheme, and then introduces in detail the characteristics, driving mode and control strategy of stepper motor driven by micro metering pump. Due to the nonlinear, lag and complexity of the model, the closed loop control of micro metering pump is realized by fuzzy PID. Secondly, in the aspect of hardware, the hardware circuit based on DSP2812 is designed, such as LCD12864 display circuit, keystroke circuit, alarm circuit and so on. The software uses CCS3.3 integrated development software to write the program, and uses the SCI interface of DSP to communicate with the host computer. The system receives the flow control signal from the upper computer and converts the frequency value of the stepping motor into the frequency value of the step motor through the flow controller. The system generates the frequency adjustable PWM signal to the stepping motor driver by using the PWM module of DSP. Thus driving the operation of micro metering pump. Using the orthogonal coding interface of DSP to measure the speed feedback of stepping motor to the control system, the fuzzy PID control algorithm is called in the system to realize the accurate measurement of the flow rate of the micro metering pump. The software mainly includes main program, initialization program LCD12864 display program, encoder feedback program, closed-loop algorithm control program, and communication interrupt service program. Finally, the communication between the system and the host computer is realized through the RS-232 interface, and the man-machine interactive monitoring interface is designed by using VC 6.0 to realize the data exchange and display between the upper computer and the lower computer.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP273
本文编号：2210923
[Abstract]:Micro metering pump is widely used in plant process control. With the development of control technology and digital information technology, the automation technology of factory is updated day by day, and the requirement of accuracy and stability of metering pump is improved. Compared with foreign countries, the research on micro metering pumps in China is less and starts late. The structure and control of micro metering pumps lag behind those of foreign countries. The control effect of domestic micro metering pump is sometimes difficult to meet the complex production requirements of the factory process. It is necessary to improve the structure and control strategy to make it have higher control precision and better stability. In this paper, the control system of micro metering pump is studied and improved from the control strategy, and the closed loop control algorithm, hardware circuit and software system of micro metering pump are studied deeply. The following is the main contents of this paper: firstly, the basic research situation of micro metering pump system at home and abroad is analyzed, and the advantages and disadvantages of closed loop and semi closed loop control schemes are analyzed. Because the flow pulsation of micro metering pump is not conducive to the full closed loop of flow feedback, this paper adopts a semi closed loop control scheme, and then introduces in detail the characteristics, driving mode and control strategy of stepper motor driven by micro metering pump. Due to the nonlinear, lag and complexity of the model, the closed loop control of micro metering pump is realized by fuzzy PID. Secondly, in the aspect of hardware, the hardware circuit based on DSP2812 is designed, such as LCD12864 display circuit, keystroke circuit, alarm circuit and so on. The software uses CCS3.3 integrated development software to write the program, and uses the SCI interface of DSP to communicate with the host computer. The system receives the flow control signal from the upper computer and converts the frequency value of the stepping motor into the frequency value of the step motor through the flow controller. The system generates the frequency adjustable PWM signal to the stepping motor driver by using the PWM module of DSP. Thus driving the operation of micro metering pump. Using the orthogonal coding interface of DSP to measure the speed feedback of stepping motor to the control system, the fuzzy PID control algorithm is called in the system to realize the accurate measurement of the flow rate of the micro metering pump. The software mainly includes main program, initialization program LCD12864 display program, encoder feedback program, closed-loop algorithm control program, and communication interrupt service program. Finally, the communication between the system and the host computer is realized through the RS-232 interface, and the man-machine interactive monitoring interface is designed by using VC 6.0 to realize the data exchange and display between the upper computer and the lower computer.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP273
【参考文献】
相关期刊论文 前10条
1 肖兵;薛琦;余师棠;;基于DSP的M/T测速法改进[J];重庆工学院学报(自然科学版);2009年10期
2 赵秋;顾风博;;DSP在电子领域的发展及应用[J];沧州师范专科学校学报;2005年04期
3 荣盘祥;何志军;;步进电机数字控制系统设计[J];电机与控制学报;2009年02期
4 吉翔;李永全;;VC++下MSComm控件的串口通信方法[J];电脑开发与应用;2009年12期
5 胡赤兵;桑瑞鹏;;利用Visual C++6.0编制串行通信程序的实现[J];电气传动自动化;2006年04期
6 张虎堂;;数字信号处理器(DSP)的发展趋势与应用研究[J];硅谷;2010年23期
7 孟扬;张伟;程君业;;编码器基础及应用[J];国内外机电一体化技术;2007年01期
8 谭婕娟;;液晶显示模块MGLS-12864的接口技术及其应用[J];电子设计工程;2011年07期
9 邓鸿英;张生昌;牟介刚;郑水华;;基于单片机的计量泵流量控制器[J];工业仪表与自动化装置;2009年03期
10 陈雨田;黄晓斌;陈震;唐浩;杨曙光;蒋丽萍;;计量泵、磁力泵、高速泵和增压泵的应用介绍与市场发展[J];化工设备与管道;2006年06期
相关硕士学位论文 前7条
1 程硕;基于模糊控制的微量计量泵控制系统研究与设计[D];燕山大学;2012年
2 杨雯;实时隐秘网络通信系统的DSP实现[D];南京理工大学;2004年
3 白志红;电磁隔膜计量泵系统的研究分析与设计[D];太原理工大学;2005年
4 刘延军;定量泵的研究与应用[D];大庆石油学院;2006年
5 欧阳星峰;计量泵数显装置及自动控制系统的研究与开发[D];浙江工业大学;2007年
6 程超;基于模糊控制的隔膜计量泵控制系统的研究[D];浙江工业大学;2009年
7 庞飞;具有远程控制功能的电磁式计量泵控制器的设计[D];大连海事大学;2010年
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