根据DS18B20和MQ2的单片机控制的温度烟雾报警系统交底

福建师范大学协和学院传感器技术作品设计

作品名称：单片机控制的温度烟雾报警系统系别: 信息技术系

专业：电子信息工程

班级：1班

学号：

学生姓名：

2012年11 月10 日

摘要

__本次设计课题为基于单片机控制的温度烟雾报警系统。在设计中包括硬件和软件设计两部分，其中硬件设计，包括单片机控制电路、温度传感器、烟雾传感器、驱动执行报警电路、显示控制电路等部分组成，处理器为STC89C52型单片机。随着现代信息技术的飞速发展和传统工业改造的逐步实现，能够独立工作的温度检测与显示系统应用于诸多领域。传统的温度检测以热敏电阻为温度敏感元件。热敏电阻的成本低，需要外加信号处理电路，而且可靠性相对较差，测温准确度低，检测系统也有一定的误差。与传统的温度计相比，这次设计的是基于DS18B20的数字温度计，它具有读数方便，测温范围广，测温精确，数字显示，适用范围宽等特点。

关键字: 单片机温度传感器报警

ABSTRACT

This design is based on the single chip microcomputer to control the temperature alarm system. Included in the design of hardware and software design of two parts, this paper mainly for hardware design, including the control circuit of the single chip microcomputer, temperature sensor, driving alarm circuit, a display control circuit components, the processor for the STC89C52 type mcu. With the rapid development of modern information technology and traditional industry to transform gradually realization, able to work independently of the temperature detection and display system is used in many fields. The traditional temperature measurement using thermistor as a temperature sensitive element. Thermal resistance of the low cost, the need of external signal processing circuit, and relatively poor reliability, measurement accuracy is low, also have certain error detection

system. Compared with the traditional thermometer, this design is based on the DS18B20 digital thermometer, it has reading convenience, a wide range of temperature measurement, accurate temperature measurement, digital display, wide application range and other features.

Key words: SCM, temperature sensor alarm

目录

摘要 ............................................................................................................................................. I ABSTRACT ................................................................................................................................. III 1 绪论 .............................................................................................................................................

1.1作品研究背景及意义.....................................................................................................................................

1.2设计目的..........................................................................................................................................................

1.3预期实现功能..................................................................................................................................................

2 设计方案 ......................................................................................................................................

2.1功能框架图 .....................................................................................................................................................

2.2具体设计方案.................................................................................................................................................

2.2.1时钟和复位电路......................................................................................................................................

2.2.2液晶显示电路.........................................................................................................................................

2.2.3声音报警电路.......................................................................................................................................... 3核心器件介绍 ................................................................................................................................

3.1.单片机STC89C52介绍 ..............................................................................................................................

3.2DS18B20介绍 ...............................................................................................................................................

4 电路的制作与调试 ........................................................................................................................

4.1器件清单 .........................................................................................................................................................