基于单片机的数字流量控制阀的结构与控制设计.doc

+ 毕业设计 基于单片机的数字流量控制阀的 结构与控制设计 学生姓名： 学号： 学 院： 专 业： 指导教师： 2012年6月 基于单片机的数字流量控制阀的 结构设计与控制研究 摘要 随着计算机技术的发展以及现代工业数字化的发展要求，在流量控制领域出现了数字式流量控制阀技术，并且得到了迅速发展。而如何降低数字阀的成本，提高控制精度，简化数字阀结构成为当前数字阀研究的主要方向。 本设计用MCS-51系列中的STC89C52RC单片机作为控制核心，以步进电机作为执行元件设计了一个低成本，高可靠性的增量式数字流量阀。通过矩阵键盘设定所需流量值，流量计读取当前管道流量，经过单片机的处理，输出控制信号控制步进电机转动以改变阀口的通流面积，从而控制流量，并能实时显示当前流量状况。在对阀的结构设计和系统的硬件电路设计的基础上，分析和设计数字流量阀的控制方案和程序。 整个系统结构简单，易于控制，工作可靠，很好的实现了在给定条件下的功能。 关键词：数字流量控制阀，单片机，步进电机 The Structural Design and Control Research of Digital Flow Control Valve based on Microcontroller Abstract With the development of computer technology and the requirements of the development of modern industry and digitization, the digital flow control valve technology began to emerge in the flow control domain, and it developed rapidly. So the main research directions of digital valve are to reduce the cost of digital valve, improve the accuracy of control and simplify the structure of digital valve. This design uses the STC89C52RC chip of MCS-51 series microcontrollers as the core, and stepper motor as executive components to control, designed a cheap, high reliability incremental digital flow valve. Through the matrix keyboard, we can set the required flow value, and the flowmeter read the current flow value, then the microcontroller output the control signal to control the stepper motor rotation, the pipeline section area will change and the flow can be controlled. Also，the current flow value will be showed on the LED. Through the structure design and the hardware circuit design of digital valve, the control plans and procedures of the system are also be analysis and designed. The whole system structure is simple, easy to control, and reliable to work. And it is realized the function very well in a given situation. Keyword: digital flow control valve, microcontroller, stepper motor 目 录 1 绪论 1 1.1 引言 1 1.