基于DS18B20与MQ2的单片机控制的温度烟雾报警系统.doc

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 __89C52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，需信号处理电路，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，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: 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 II ABSTRACT III 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 框架图 设计方案 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3.2 DS18B20介绍 4 电路的制作与调试 4.1 器件清单 4.2 调试过程 4.3 实验总结 5. 电路实物图 6. 附录 1 绪论 作品研究背景及意义 自动控制领域中，温度检测与控制占有很重要的地位。温度检测在工农业生产、科研和在人们的生活中得到广泛的运用。目前，温度传感器正从模拟式向数字集成式方向飞速发出，单片机也是人们追求的目标之一，它所给人带来的方便也