洗浴中心水温控制系统设计摘要我院淋浴间中心为超出1.2数万人给予公共性洗浴服务,洗浴会所的控制系统软件通过更新以后,选用的是根据PLC的自动化技术控制系统软件,可以完成控温控制、全自动液位仪控制等几种控制功能,本文主要进行淋浴室水的温度温控系统控制。本文以西门子系统S7-200 SMART系列产品PLC为基础,以温度控制为核心,完成了控制控制系统设计。系统由感应器、PLC、触摸显示屏等组成,水位传感器承担收集液位仪数据信号,温度感应器收集温度数据信号发送给PLC,本设计方案采用SMART LINE触摸显示屏。关键控制构思为:PLC将感应器收集的温度和设置温度进行对比,根据PD计算,控制阀门的开关,调整冷水的注入,以更改冷水的混合比例,进而控制温度,最终使淋浴管中混合水的温度做到或接近设置温度。本课题研究进而对工艺流程功能的深刻领会为载体,完成了控制系统软件的硬件型号选择、电气图纸设计方案、PLC编程设计、HMI监控视频设计。软件开发完成了加工工艺功能流程表及其子程序程序流程,和上位机软件HMI监管组态设计方案,从而实现淋浴室水的温度控温的功能。关键词:温度电动阀PID PLCAbstractSifang Academy Shower Center for more than 12,000 people to provide public bathservices,After bath Center control system upgraded,the selection of the PLC based onAutomation control system.It has the temperature control,automatic level control andother control functions,this article mainly completes the bathroom temperature controlsystem.Based on Siemens S7-200SMART Series PLC,the control system is designed with the focus of temperature control.The system is composed of sensors,PLC,touch screen,andso on,liquid level sensor is responsible for collects liquid level signal,temperature sensorcollects temperature signal to PLC,this design uses Smart Line touch screen.The main control idea is:The PLC will collects the temperature and set temperature of the sensor compared,through the PID operation,control the valve switch,regulate the inflow of cold water,to change the mixing proportion of cold water,thereby controls the temperature,the temperature of the mixed water in the shower tube reaches or near the setting temperature finally.This topic is based on the profound understanding of the process function,completes the hardware selection of the control system,the electric schematic design,the PLC program design,the HMI monitor screen design.The software designs complete the process flowchart and the ladder diagram program,and the PC HMI monitor configuration software design,realizes the bathroom water temperature constant temperature function finally.Key words:Temperature Electric valve PID PLC目录第1章绪论…111课题研究的目的意义……112国内外研究现状……213本课题的研究内容……4第2章我校洗浴中心水温控制系统设计方案…52.1洗浴中心简介……52.2洗浴中心工艺系统……523关键工艺功能的实现原理……623.1淋浴水恒温工作原理……623.2恒温水箱调温工作原理……623.3浴室水温控制原理…82.4本课题的设计方案…4…82.4.1淋浴水温度控制系统的技术指标……82.4.2基本被控设备的控制要求……82.5硬件部分……92.6软件部分……10第3章洗浴中心控制系统电气原理图设计……113.1 SMART PLC介绍……1132PLC外围/O分配……123.2.1淋浴水温和浴室水温控制要求分析123.2.2/0信号统计…………1433PLC接线图…153.4电路原理图设计……173.4.1器件选型173.4.2电气接线图…17第4章控制系统软件设计…4…204.1STEP7-MicroWIN SMART软件简介…204.1.1系统块设置…204.1.2符号表……214.2PLC程序设计……2242.1设计思路…224.3PLC的模拟量采样子程序设计……254.3.1模拟量采样原理……254.3.2模拟量输入数据转化……254.4恒温控制梯形图设计…294.4.1系统启动294.4.2启动时程序…4…304.4.3电动阀S7挖制程序…314.4.4PD子程序设计…334.5 WinCC flexible SMART组态软件…374.5.1 WinCC flexible SMART软件介绍……374.5.2软件安装…374.5.3组态画面的设计……384.5.4与S7-200 SMART系列PLC的通讯……40第5章仿真结果……425.1PLC仿真结果425.2组态画面仿真结果……42第6章结论…446.1结论……446.2展望……44参考文献……46致词谢…47
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