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电子与信息工程学院

本 科 毕 业 论 文

论文题目 电子体温计的设计与实现 学生姓名 刘 恒 强 学 号 093521016 专 业 电气工程及其自动化 班 级 093523 指导教师 刘 芳 华

2013年5月

摘 要

摘 要

体温计在人们的日常生活中必不可少，基本每个家庭都缺不了它。在现代化的工业生产中基于单片机的应用非常广泛，并且在我们生活、工作、科研中随处可见，它早已经成为我们身边一个很有用的工具。

鉴于以上两点，本文将介绍一种以单片机为基础控制的电子温度计。本设计将对硬件选择以及结构进行设计，并且采用新型的可编程温度传感器DS18B20，它的优点是能直接与单片机完成数据采集和处理，实现方便、精度高，性能稳定，并且不需复杂的信号调理电路和A/D转换电路。只需要使传感器DS18B20与人体接触，进行温度感应后，DS18B20就可以感应温度并且直接送入AT89S51单片机中，经过单片机的信号处理并将其送出，通过LCD1602数码管进行显示。这样的好处是可以快速并精准的测量出人体体温，与传统的水银体温计相比，它的优点是测量精准度高、测量时间短、并且方便读数。同时它具有记忆功能并能完成蜂鸣提示回警。最后它不含有对人体有害的水银，对人体环境无害，在普通家庭和医院是绝佳的选择。

关 键 词：电子体温计；DS18B20传感器；AT89S51单片机；显示屏

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湖北科技学院学士学位论文

ABSTRACT

The thermometer is essential in people's daily lives, basically every family is not lack of it. Microcontroller-based applications in modern industrial production is very wide, and everywhere we live, work, scientific research, it is already around us is a very useful tool.

In view of the above two points, the paper will introduce a microcontroller-based control electronic thermometer. The design of the hardware selection and structure design, and the use of a new type of programmable temperature sensor DS18B20, it has the advantage directly with the MCU to complete the data acquisition and processing, convenient, high precision, stable performance, and does not require complicated signal conditioning circuit and A / D conversion circuit. Just need to make sensor DS18B20 with human contact, temperature sensor, DS18B20 can sense temperature and fed directly to AT89S51 single-chip microcontroller signal processing and sent through the LCD1602 digital tube display. The advantage is that can quickly and accurately measure the body temperature,compared with traditional mercury thermometer, it has the advantage of high measurement accuracy, the measurement time is short and easy to read. At the same time it has a memory function and can complete Beeper back to the police. Finally, it does not contain harmful mercury, environmentally sound on the human body, is an excellent choice in ordinary homes and hospitals.

KEYWORDS: Digital thermometer；DS18B20 sensor；AT89S51 microcontroller；LCD screen

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