经典给予数码管的温度测试仪.doc

摘 要 在工农业生产和日常生活中，有的时候迫切需要知道某种环境、某种物体的温度，而且需要将它显示出来。更高的要求是，能够通过设定温度值，当温度超过一定的阈值时，通过声光报警提醒人们，将温度状况用更加人性化的方式表现出来。 由于人们这些新需求的出现，并随着计算机近年来在社会领域的渗透，单片机的应用也不断地走向深入。在实时检测和自动控制的单片机应用系统中，单片机往往是作为一个核心部件来使用，系统中还应具备其他硬件结构，以及针对具体应用对象特点，与之相配套的软件。 本文介绍一种环境温度检测系统的设计，说明了设计原理及控制方法。环境温度检测系统是利用温度传感器采集当前环境或物体温度值，同时结合数码显示技术和按键输入，存储技术。除具备传统的温度检测系统的显示功能外，该温度检测系统具有设置温度上、下限，超限自动控制空调控制环境温度，声光报警等功能，利用按键控制温度的测量、显示和温度值超限时的报警。 该系统选用AT89S51单片机为主控制器，采用一线制数字温度传感器DS18B20作为温度传感器，采用三位七段LED作为显示器件，利用电可擦除存储器器件，AT24C02实现温度报警阈值的存储。 该系统实现了环境温度的测量、显示、报警、报警的功能，这种系统的功能实现主要是通过单片机来控制完成的，说明单片机已广泛应用于人们的日常生活中，在各种领域中起到越来越重要的作用。　　 关键词：测量温度；AT89S51；DS18B20；AT24C02；阈值声光报警 Abstract In industrial and agricultural production, and also in daily life of the people, sometimes pressing need to know the temperature of certain circumstances, or what’s the temperature of an object, and need to show it on the screen. Higher demand is the need for synchronization with speech the temperature value of the function, temperature values will be more humane manner shown. As the people of these new demand has emerged, the infiltration in the social field of the computer in recent years, the application of the MicroController Unit (MCU) is moving towards deepening constantly, drive tradition is that it measure crescent benefit to upgrade day to control at the same time. In measuring in real time and automatically controlled MCU application system, the MCU often uses as a key part, system should also possess other hardware structure, as well as specific characteristics of the target application with the software. This paper presents a temperature detection system design, the design describes the principle and the control methods. Temperature detection system uses the temperature sensor to acquire the temperature about the environment or it of the object. And it is combining display some number technology with integrated voice chip technology. In addition to having the display function of the traditional temperature detection system, th