[信息与通信]室内温湿度实时监测.doc

摘 要 温度和湿度是室内环境两大重要参数，为了能够实时掌握室内温湿度环境，本文介绍了一种基于单片机的温湿度实时监测系统的实现原理。在本系统中采用数字式温度传感器DS18B20对室内温度信号进行采集，采用模拟式湿度传感器HS1101对室内湿度信号进行采集，湿度传感器HS1101与555定时器构成多谐振荡电路，输出脉冲信号。将温度信号与湿度信号送入主控制器单片机AT89C52进行运算处理。最后通过LCD1602显示实时温度和湿度值。此外该系统还可以通过键盘设定温湿度上下限，并且具有温度超限和湿度超限分别报警的功能，系统采用发光二极管进行发光报警。该系统具有显示直观、准确，使用方便可靠等优点，Abstract The temperature and humidity are two important parameters of indoor environment,in order to control the indoor temperature and humidity environment real-time, this paper introduces implementation principle of temperature and humidity real-time monitoring system based on Microcontroller. In this system, use digital temperature sensor DS18B20 for indoor temperature signal acquisition and use humidity sensor HS1101 for signal acquisition on the indoor humidity, using HS1101 humidity sensor and 555 timers to constitute a circuit to output pulse signal. The humidity and the temperature signal are sent to the main controller AT89C52 microcontroller for computing. Finally, display the temperature and humidity values by the LCD1602. In addition, the system can also set upper and lower limits of temperature and humidity via the keyboard, and to alarm when temperature gauge and humidity gauge respectively, system uses light-emitting diode for light emitting warning. The system has function of displaying an intuitive accurate easy to use reliable and so on, can be easily realize real-time Monitoring indoor temperature and humidity. Keywords : Microcontroller ; Temperature measurement ; Humidity measurement ; Limit alarm 目 录 第一章 课题分析 1 1.1课题研究背景和意义 1 1.2本次设计的主要内容及参数要求 2 1.2.1基本功能 2 1.2.2 主要技术参数 2 第二章 方案论证 3 2.1方案1 3 2.1.1 温度采集模块 3 2.1.2湿度数据采集模块 5 2.1.3单片机控制处理模块 5 2.1.4显示系统模块 5 2.1.5超限报警模块 6 2.1.6温湿度上下限设定模块 6 2.2方案2 6 2.2.1温度数据采集模块 6 2.2.2湿度数据采集模块 7 2.2.3单片机控制处理模块 7 2.2.4显示系统模块 8 2.2.5超限报警模块 8 2.2.6温湿度上下限设定模块 8 2.3方案比较选择 8 2.4本章小结 9 第三章 硬件电路的设计 10 3.1温度数据采集模块 10 3.1.1 温度传感器概述 10 3.1.2 DS18B20介绍 11 3.1.3 DS18B20与单片机的连接 12 3.2 湿度数据采集模块 13 3.2.1 湿度传感器HS1101 13 3.2.2 湿度测量电路 14 3.3单