摘要：本课题设计的是一种当前多种行业需要的便携式环境参数监测仪。它以低功耗单片机AT89C52为控制核心,配置微型低功耗传感器SHT10,并使用1602液晶显示采集数据，可以实现温度、湿度等参数的采集处理。针对实际测量值超过测量范围的情况，设计中添加了鸣蜂器，一旦实际测量值大于可测量范围，鸣蜂器便报警提示。整体设计上硬件电路组成部分分为：传感器电路、单片机系统电路、按键电路、显示器电路和鸣蜂器电路。软件部分由SHT10温湿度采集程序、液晶显示程序、外部存储读写程序以及通信程序等。经调试监测该设计采集数据精确，且价格低廉，具有一定的推广意义。53066

毕业论文关键词：单片机AT89C52，SHT10，1602液晶显示

Abstract: This topic is the design of a portable environment parameter monitor witch connecting a variety of current industry needs . It use the low power consumption MCU AT89C52 as the control core, configuring a miniature low power sensor SHT10 to collect temperature and humidity, and the liquid crystal display 1602 is used to display the data, witch can get and figure out the temperature, humidity and other parameters that we need. According to the actual measured value exceeds the range of measurement, we added buzzer to the design ,once the actual measured value is greater than the measurable range, the buzzer will alarm. The hardware circuit design part is pided into: the boost circuit, micro controller system circuit, RS485 conversion circuit, display circuit and a circuit. The software part consists of temperature and humidity data acquisition program, SHT11 display program, the external memory read and write program and communication program. This design consist of a accurate collecting data ,with low prime cost,.So,the promotion has a great certain significance.

Key words: MCU AT89C52, SHT10 ,LCD1602 liquid crystal display

目录

1 前言 4

1.1 课题研究背景 4

1.2 课题研究意义 5

1.3 课题设计任务 5

2 系统设计内容和方案 5

2.1 系统设计内容和功能要求 5

2.1.1 系统设计内容 5

2.1.2 系统功能要求 6

2.2 系统设计方案 6

2.2.1 系统设计框图 6

2.2.2  核心控制器 7

2.2.3 SHT10温度传感器 7

2.2.4 LCD液晶显示 8

3 硬件电路设计 10

3.1 单片机模块 10

3.2 SHT10温湿度传感器模块 12

3.2.1 模块电路图 12

3.2.2电路特性 12

3.2.3 传感器特点 13

3.3 LCD1602显示模块 14

3.4  报警模块 16

3.5 晶振电路 18

3.6 按键模块 18

4 软件设计流程和内容 19

4.1 主程序流程图 19

4.2　1602液晶显示模块设计 21

4.3　传感器模块设计 26

5 调试与仿真 AT89C52单片机便携式多参数环境检测仪+程序+电路图:http://www.751com.cn/zidonghua/lunwen_57126.html