毕业设计 单片机 多功能温度计.doc

摘要 本论文介绍的是基于AT89S51单片机数字钟和数字温度计设计，体现模块化设计思想。论文重点阐述了硬件模块——MCU模块、温度的感应模块、时钟模块、控制模块、显示模块的设计。软件同样采用模块化设计，软件模块——中断模块、温度转化模块、时间调整模块的设计。温度是生产过程和科学实验中普遍而且重要的物理参数之一。在生产过程中，为了高效地进行生产，必须对它的主要参数，如温度、压力、流量等进行有效的控制。温度控制在生产过程中占有相当大的比例。温度测量是温度控制的基础，技术已经比较成熟。传统的测温元件有热电偶和二电阻。而热电偶和热电阻测出的一般都是电压，再转换成对应的温度，这些方法相对比较复杂，需要比较多的外部硬件支持。我们用一种相对比较简单的方式来测量。我们采用美国DALLAS半导体公司继DS1820之后推出的一种改进型智能温度传感器DS18B20作为检测元件，温度范围为-55~125 oC,最高分辨率可达0.0625 oC。DS18B20可以直接读出北侧温度值，而且采用三线制与单片机相连，减少了外部的硬件电路，具有低成本和易使用的特点。微控制器数字控制；温度计AT89S51，DS18B20。Abstract This paper introduced the design of digital clock and digital thermometer based on MCU of AT89S51. the specific process of how the system hardware and software achieved were detailed description through the design of multifunction digital clock and digital thermometer. The modular design and production, which consisted of MCU module,temperature sensor module, clock module and the associated control module. As well as hardware designing，software design use the same method, consists suspension module，time adjust module and temperature conersion module.temperature is the production process and scientific experiments in general and one of the important physical parameter. In the production process, in order to efficiently carry out the production, to be its main parameters, such as temperature, pressure, flow control, etc... Temperature control in the production process of a large proportion. Temperature measurement is the basis of temperature-controlled, more mature technology. Traditional thermocouple and temperature components are the second resistor. The thermocouple and thermal resistance are generally measured voltage, and then replaced by the corresponding temperature, these methods are relatively complex, requiring a relatively large number of external hardware support. We use a relatively simple way to measure. We use the United States following DALLAS Semiconductor DS1820 improved after the introduction of a smart temperature sensor DS18B20 as the detection el