电子体温计（硬件部分）的设计_毕业论文.doc

PAGE IV 毕业论文（设计） 题 目 电子体温计（硬件部分）的设计 电子体温计（硬件部分）的设计 电子信息工程专业 【摘 要】 体温计是人们生活中的必不可少的用品。在现代化的工业生产中，单片机技术已经普及到我们生活、工作、科研各个领域，已经成为一种有力的工具，本文介绍一种基于单片机控制的电子温度计。 本设计采用电子体温计系统的硬件设计，采用一种新型的可编程温度传感（DS18B20），不需复杂的信号调理电路和A／D转换电路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。传感器DS18B20接触人体，感应温度后，模数转化后的电信号送入STC89C52单片机，并将其送入LCD1602数码管显示。它能快速准确地测量人体体温，与传统的水银玻璃体温计相比，具有读数方便，测量时间短，测量精度高，能记忆并有蜂鸣提示的优点。并且超过预定的温度，回有报警提示。尤其是电子体温计不含水银，对人体及周围环境无害，特别适合于家庭，医院等场合使用。 【关键词】 电子体温计 DS18B20传感器 STC89C52单片机 LCD1602显示屏 The Design Of The Electronic Thermometer (Hardware Part) Electronic And Information Engineering 【Abstract】The thermometer is essential necessities in peoples lives. In modern industrial production, single-chip technology has spread to the way we live, work, research in various fields, has become a powerful tool, this paper describes a microcontroller-based control of electronic thermometers. This design uses the hardware design of the electronic thermometer system, a new type of programmable temperature sensor (DS18B20), data acquisition and processing does not require complicated signal conditioning circuitry and the A / D conversion circuit with a microcontroller, easy to achieve accuracy high and stable performance. Sensor DS18B20 contact with the human body, the sensor temperature, the electrical signals into the analog-to-digital conversion STC89C52 microcontroller and into the LCD1602 digital display. It can quickly and accurately measure the body temperature, compared with traditional mercury glass thermometer, with the easy reading, short measurement time, high measurement accuracy, memory and Beeper advantages. And exceeds a predetermined temperature, back to the alarm. Electronic thermometer mercury-free, on the human body and ambient sound, especially suitable for families, hospitals and other occasions. 【Key words】Digital Thermometer DS18B20 Sensor STC89C52 Microcontroller LCD1602 Display 目录 TOC \o 1-3 \h \z \u TOC \o 1-3 \h \z \u 绪论 1 1 任务要求 2 2 设计思路 2 3