毕业设计（论）-水塔水位PID控制系统设计.docVIP

洛阳理工学院毕业设计(论文)PAGE IPAGE 42水塔水位PID控制系统设计摘 要供水是一个关系国计民生的重要产业。随着社会的发展和人民生活水平的提高，对城市供水提出了更高的要求，有一个水箱需要维持一定的水位，该水塔里的水以变化的速度流出。这就需要有一个输入控制液体阀以不同的速度给水塔供水，以维持水位的变化，这样才能使水塔不断水。研究设计的基于PLC控制的水塔水位PID供水系统,以西门子公司的S7-200系列中PLC-CPU226为基础，结合模拟量模块EM235、液位传感器、输入控制液压阀、输出控制液压阀等，组成一个基于S7-200系列中PLC-CPU226的水塔水位控制系统，能完成逻辑控制、水位调节和数据采样等功能,实现对水塔的水位进行控制及检测。在设计中大量运用PLC中PID来实现水塔水位的控制，为了精确地实现对水位的控制 ，建立成闭环控制系统，实现了水塔中的进、出水的水位自动控制。关键词： 可编程控制器PLC，水塔水位，PID控制 Water TOWERS pid CONTROL SYSTEM DESIGNABSTRACTWater supply is an important industry of the peoples livelihood. With the social development and peoples living standards, urban water supply to a higher demand, there is a need to maintain a certain water tank water level, the water towers in order to change the speed of the outflow. This requires a liquid input control valve to the different speeds of water towers in order to maintain the water level changes, so that continuous water towers.  PLC-based research and design of the towers level PID control the water supply system to Siemens S7-200 series PLC-CPU226-based light simulation module EM235, liquid level sensors, type of hydraulic control valve, hydraulic valve control output and so on, based on the formation of a S7-200 series of the PCL-CPU226 towers water level control system, to complete logic control, water regulation and function of data sampling, etc., to achieve the level of the water tower for control and detection. In the design of PID make extensive use of PLC to achieve the level of control towers, in order to achieve precise level of control, into a closed-loop control system, the water tower in progress, the water level of automation.KEY WORDS: Programmable Logic Controller PLC, Water Towers, PID Control目　录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc232697106 前　言 PAGEREF _Toc232697106 \h 1 HYPERLINK \l _Toc232697107 第1章 水塔水位自动控制系统的概述 PAGEREF _Toc232697107 \h 2 HYPERLINK \l _Toc232697108 1.1 水位控制系统现状与发展 PAGEREF _Toc232697108 \h 2 HYPERLINK \l _Toc232697109 1.2 水塔水位自动控制系统