基于单片机ATmega16电子湿度计设计.doc

基于的设计人们的生活和工业生产有着密切的关系。为了创造舒适的生活环境和理想的生产条件必须对空气湿度进行和调整。AVR单片机ATmega16为硬件核心，通过实时采集和数据处理能够准确地监测环境湿度，采用LED 数码管作为辅助显示模块，显示当前环境湿度，当被测环境湿度超过预设定数值时，将产生声光报警，并且用PC机为上位机提供一个可视界面串口通信数据保存、查询、备份功能，，esign of the Electronic Hygrometer Based on ATmega16 AVR Microcontroller Abstract：Humidity closely related with industrial and agricultural production，as well as peoples lives. In order to create a comfortable living environment and the ideal production conditions, we need measure and control the humidity precisely. This article discusses the detection of air humidity alarm monitoring hardware, software design and implementation of programs that based on the measurement and control technology. The system uses ATmega16 AVR Microcontroller as the core, it can accurately monitor the indoor air humidity through real-time acquisition, data processing. LED digital tube display is used as a supplementary module displays the current air humidity. When measured more or less than pre-set value, the system will have a sound and light alarm. And used as a PC for the system to provide a visual interface, Serial communication, Data retention，Data query，Data backup, and control functions.This paper focuses on the system hardware, the structure of software, and the features of function, and stress on the signal acquisition and processing, the expansion circuit of single-chip, design ideas and implementation. In the current trial, the system can measure the environment humidity reliably, stably and securely, with the promotion of application value. Key words: Humidity Sensor, AVR Microcontroller, Humidity Measurement, Sound-Light Alare 目 录 摘要 I Abstract. II 第1章 绪论 1 1.1 课题背景、目的及意义 1 1.1.1 课题背景 1 1.1.2 课题的目的及意义 2 1.2 系统设计内容 2 第2章 系统概述 4 2.1 系统设计主要原理 4 2.2 系统硬件设计方案 4 2.2.1 微控制器的选择 4 2.2.2 湿度传感器的选择 5 2.2.3 显示方案的确定 6 2.3 系统软件设计方案 7 2.3.1 上位机软件设计方案 8 2.3.2 微控器软件设计方案 9 第3章 系统硬件设计实现 12 3.1 电子湿度计系统的组成结构 12 3.2 主控器最小系统 13 3.2.1 ATmega16简介 13 3.2.2 引脚图及引脚介绍 14 3.2.3 单片机最小系统电路设计 15 3.2.3.