毕业设计说明书温室大棚控制系统设计。.docx

毕业设计说明书
题目: 温室大棚控制系统设计
姓名:
学号: 0703205019
指导教师:
专业年级: 2007级电气工程及其自动化(1)班
所在学院和系:
完成日期: 2011年6月05日
答辩日期:
摘要
温室是设施农业的重要组成部分,温室大棚测控系统是实现温室生产管理自动化、科学化的基本保证。通过对监测数据的分析,结合作物生长规律,控制环境条件,使作物在不适宜生长的反季节中,可获得比室外生长更优的环境条件,从而使作物达到优质、高产、高效的栽培目的。
本系统利用计算机自动控制技术,将检测与控制过程完全自动化,实现温室内温度、湿度、二氧化碳浓度的自动调控。系统的总体布置有四个组成部分,即:数据采集部分、信号处理部分、控制和执行部分、串口通讯部分。
本系统可以实时检测并显示温室内温度、湿度、二氧化碳浓度,根据作物适宜值发出执行输出,以便为作物提供一个良好的环境。系统主要具有如下功能:对当前的环境因子测量并记录,采用了4位LED显示数码管,能实时显示当前测量值;当采集到的当前值高于上限值或低于下限值时,能够实现超限报警,其中长鸣声代表超低限报警,短鸣声代表超高限报警,与此同时相应的报警指示灯亮;当测量值低于或高于适宜值时,输出开关量控制;提供人机对话界面,采用一根串口线与电脑串口相连进行通讯,可以在电脑上显示当前的采集值,并可随时修改数据,设置高、低阀值。
关键词:温室大棚,温湿度,二氧化碳,测控,单片机
ABSTRACT
Greenhouse is an important part of facilities agriculture, greenhouse canopy measurement and control system is to achieve greenhouse production management automation, scientific basic guarantee. Based on the analysis of the monitoring data, combined with the crop growth rule, control the environmental condition, make crops in not suitable for growth, available in than anti-season outdoor more optimal environmental conditions growth, thus make crops reach high quality, high yield, high efficient cultivation purpose.
This system by puter automatic control technology, will detect and control process is fully automated and realize in greenhouse temperature, humidity, carbon dioxide concentration of automatic control. System layout has ponents, namely: data collection part, signal processing parts, control and execution part, munication parts.
This system can real-time detection and display in greenhouse temperature, humidity, carbon dioxide concentration, based on crop appropriate value issued executive output, in order to provide a good environment crop. System mainly has the following functions: the environmental factor to the current measure and record, adopted four LED display digital tube, which can real-time display the current measured values; When the acquisition to the current value of the above the upper or lower than lower lim