PLC智能温室控制系统设计+梯形图

摘要：我国是农业大国，农业经济在国民经济发展中有着不可取代的地位。同时，人们对绿色无公害农产品的需求也随着生活质量的提高而提高。因此，改善农业结构，提高经济作物的增长已成为农业发展的必然趋势。建造智能温室可以有效的控制作物生长的温度、CO2 浓度、光照强度等环境因素，从而促进经济作物生长。通过对环境参数的分析和控制对象的特点，确定了控制系统的结构和方案。在设计中，通过温度传感器、CO2 浓度传感器和光照强度传感器对温室里的环境进行检测，并将采集到的信号转换输入 PLC 中，再由 PLC 与用户设定的环境参数限定值进行比较，从而发出对应的指令控制执行部件来调节温室内的环境参数，最终实现了一个智能温室控制系统。70532

关键词：智能温室，环境参数，PLC

Abstract ： Our country is a large agricultural country, the agricultural economy has an irreplaceable role in national economic development. At the same time, the demand for green pollution-free agricultural products along with improved quality of life and improve. Therefore, to improve the agricultural structure, improving economic growth in crops has become an inevitable trend of agricultural development. Built intelligent greenhouse crop can effectively control temperature, CO2 concentration, light intensity and other environmental factors, so as to

promote the growth of crops. Through the analysis and control of environmental parameters characteristic of the object to determine the structure and program of the control system. In the design, by the temperature sensor, CO2 concentration sensor, and light intensity sensor for detecting hothouse environment, and inputs the PLC collected conversion signals, and then by comparing the environmental parameters and the limit value set by the user PLC, thereby issued a corresponding instruction execution control means to regulate environmental parameters within the greenhouse, and ultimately an intelligent greenhouse control system.

Keywords: Intelligent Greenhouse ， Environmental parameters ， Programmable Logic Control

1 绪论 4

1.1 课题研究背景 4

1.2 智能温室的发展现状和发展趋势 4

1.2.1 国外温室现状 4

1.2.2 国内温室现状 4

1.2.3 智能温室发展趋势 5

2 智能温室控制系统整体概述 6

2.1 智能温室系统控制对象 6

2.2 智能温室的控制系统的选择 6

2.3 控制系统整体分析 7

2.4 PLC 简介 8

2.4.1 PLC 的简单概述 8

2.4.2 PLC 的特点 8

2.4.3 PLC 的工作原理 8

2.4.4 PLC 的编程语言 9

3 智能温室控制系统的硬件设计 10

3.1 传感器的选型设计 10

3.2 电气控制系统设计 10

3.2.1 PLC 的选型和 I/O 分配 PLC智能温室控制系统设计+梯形图:http://www.youerw.com/zidonghua/lunwen_79887.html