基于组态王的温度监控系统毕业论文.doc

基于PLC+组态王的温度监控系统设计 摘要：在工业生产自动控制中，为了生产安全以及保证产品质量，对于温度、压力、流量、速度等一些重要的被控参数需要进行自动检测，并根据检测结果进行相应的控制。在自动监控系统中通常设有被控参数的上下限检测、报警及自动处理系统，以提醒操作人员采取必要的紧急措施。由于温度是工业生产中主要的被控参数之一，本课题选择对温度进行采集来探究自动监控系统。PLC结构简单，编程方便，可靠性高，且对使用环境适应性极强，广泛用于工业生产自动控制中。同时，PLC具有特殊功能模块，可以对采集输入的模拟量进行分析和处理。因此本课题使用PLC中的EM231模块对采集的信息进行A/D转换，转换后的信息传入PLC的CPU中，再使用计算机做上位机进行信息处理，在计算机中使用组态王与PLC之间通过通信线路实现信息的交换和对传送来的温度进行监测。本课题以一个基于组态王的PLC温度监控系统为例，来研究PLC在模拟量信号监测系统中的应用问题。 关键词：PLC；组态王；温度监控系统；EM231 Abstract:In order to guarantee the security of the production process and the quality of the production during the industrial automatic control, various vital controlled parameters should be detected automatically, such as temperature, pressure, flux and speed. And corresponding measures should be took according to the result of detection. To paying attention to the operation staff to do some emergency measures, warning systems, auto-processing systems, the ceiling of the controlled parameters, and the lower limit of the controlled parameters usually be carried in a monitoring system. Considering temperature is an important parameter during the production process, this project choose the data collection of temperature to explore the automatic monitoring system. The Programmable Logic Controller have the simple structure, convenient programming, highly reliability, and great adaptive faculty of working conditions. Moreover, it is widely used in the industrial automatic control. In addition, PLC have functional module, it can analysis and handle the collected manipulation data, so this project use the EM231 module of PLC to realize the a/d conversion of the collected data and send the result of a/d conversion to the CPU of PLC. This project choose a computer to handle information processing as a upper monitor. In order to monitor the temperature, the exchange and transfer of information are realized by the telecommunication line between the Kingview Software in the computer and PLC. This project