重庆邮电大学 毕业设计(论文).doc

编号:
审定成绩:
重庆邮电大学
毕业设计(论文)
设计(论文)题目:
基于单片机的数字温度计设计
学院名称:
通信与信息工程学院
学生姓名:
专业:
电子信息工程
班级:
学号:
指导教师:
答辩组负责人:
填表时间:2011年 6月
重庆邮电大学
摘要
随着现代工农业技术的发展及人们对生活环境要求的提高,人们在生活的许多方面都有着对温度进行感知和控制的需要。而传统的温度计由于各种原因,精度不能达到我们预期的效果,随着现代微电子及信息科学的发展,数字温度计无疑成为温度计设计的最有效方案。
本文是介绍基于单片机的数字温度计的设计,该温度计由中央控制器、温度检测器、显示器及报警部分组成。该温度计的基本范围为-50℃-110℃,℃,LCD液晶显示器直接读取温度值显示,当测量温度超出报警门限时,系统将输出光报警信号。
本文主要包括两个方面的设计:一方面是硬件电路的设计,另一方面是系统程序的设计。其中,硬件电路各部分组成如下:中央控制器采用单片机AT89S51,温度检测部分采用DS18B20温度传感器,用LCD液晶1602作为显示器。其次,系统软件程序包括主程序,温度值读取、转换及计算程序,显示数据刷新程序等。
该温度计整体功能的实现是通过温度传感器DS18B20采集温度信号送该给单片机处理,单片机再把温度数据送液晶显示器1602显示。
【关键词】单片机温度传感器 DS18B20 LCD液晶显示器
ABSTRACT
As the modern industrial and agricultural technology development and people's living environment of increased demand, people in many aspects of life have a right temperature sensing and control needs. And the traditional thermometer for various reasons, can not achieve the accuracy of the results we expected, with modern microelectronics and the development of information science, digital thermometer thermometer undoubtedly e the most effective design programme.
This paper describes the digital thermometer which is consisted of the central controller, temperature detectors, monitors and thermometer’s basic range is from -50 ℃ to 110 ℃,its accuracy error is less than ℃ and LCD directly shows numerical temperature. When the measured temperature exceed the limit alarm doors, the system will output alarm signal.
The paper includes tow aspects of the design: one is hardware circuit design, the other is the system process design. Among them, the ponents are as following: the central controller SCM AT89S51,the temperature detection DS18B20 part of a temperature sensor,and LCD monitors, as LCD 1602 F; the system software programs, including the main program, the temperature reading, conversion and calculation procedures, the data show that refresh procedures and so on.
Temperature Sensor DS18B20 acquisition of the tem