学士学位论文___智能环境测控系统软硬件设计.doc

摘 要  关键词：智能； 温湿度； 传感器； 测控； 单片机 Abstract This thesis presents the measuring and controlling system about temperature, in the specific environment，composed of host PC and secondary MCU. Considering the accuracy and economical, this thesis design A89S52 as the core control apparatus. After the nonlinear is compensated with least square method to measuring result, it has reduced the nonlinear error of sensor and achieved accurate measurement and accuracy control. When the parameter has exceeded the limit, including temperature, humidity the single-chip microcomputers activate the audible and visual alarm. At the same time, the single-chip micro computers control the solid state relay to actuate mechanism for compensation. For different parameters, we can use keyboard to set the anticipant range of the crop. The secondary computer communicates with host computer though RS232. In order that its model block is composed of data acquisition, keyboard and display, serial communication, data processing and so on. At the last, this thesis presents the reliability and the measures to against interference, and make the system work more reliable and stable. This thesis chooses the devices as full consideration of the ration between performane and cost as posible save?the?human,?improve?the?control?quality?produced a?good?economic?benefit,?not?only?has?a?broad?market?prospect,?and?has?great?social?bene-fits. Keywords: Smart； Temperature； Single-chip microcomputer； Humidity； ?Sensors. 目录 1绪论 1 1.1温湿度控制背景及研究意义 1 1.2 温湿度测控技术的发展状况 2 1.2.1国外发展状况 2 1.2.2国内发展状况 2 1.3课题的主要内容及研究意义 3 1.3.1课题的主要内容 3 1.3.2 课题的研究意义 4 2 研究方案的设计 5 2.1 室内温湿度参数的调节 5 2.1.1温度的调节与控制 5 2.1.2湿度的调节与控制 5 2.1.3温度湿度之间的耦合控制 6 2.2系统总体方案设计 6 2.2.1 概述 6 2.2.2总体方案设计 7 2.3本章小结 8 3硬件设计 9 3.1温度数据的采集与处理 9 3.1.1温度传感器的选用 9 3.2湿度数据的采集与处理 9 3.2.1湿度传感器的选用 10 3.2.2温湿度测量电路及其工作原理 10 3.3键盘和显示电路设计 13 3.3.1键盘电路设计 13 3.3.2显示电路设计 14 3.4报警电路 15 3.5执行机构电路 16 3.6本章小结 17 4 控制系统的软件结构和程序框图 19 4.1主程序模块