毕业设计论文基于AT89C51单片机的简易数字温度计的设计.doc

简易数字温度计的设计 [摘 要] 随着“信息时代”的到来，作为获取信息的手段传感器技术得到了显著的进步，其应用领域越来越广泛，对其要求越来越高。本文利用单片机结合传感器技术开发设计，文中把传感器理论与单片机实际应用有机结合，详细的叙述了利用温度传感器DS18B20测量环境温度，同时51单片机在现代电子产品中广泛应用以及其技术已经非常成熟，DS18B20可以直接读出被测温度值，而且采用三线制与单片机相连，减少了外部硬件电路，具有成本低和易使用的特点。具体利用单片机AT89C51作为控制器，以及温控传感器DS18B20作为温度采集器，设计了一款数字温度计。该温度计能够测出-55.5-+125℃之间的温度。按键设置好上下限后，通过18B20直接读取被测温度值，进行数据转换，实时的监控当前温度是否超出设置范围，并实现报警功能。用3位共阳数码管以串口传输数据，实现温度显示。 [关 键 词] 数字温度计；AT89C51；DS18B20；报警 [中图分类号] TN702 [文献标志码] A Design of Simple digital thermometer [Abstract]With the arrival of the information age, as a means of obtaining information sensor technology had been significant progress, its application field, more and more widely, the demand is higher and higher. This paper USES singlechip combined with the sensor technology development and design, this paper the sensor theory and single-chip microcomputer application organically, and detailed description of the temperature sensor DS18B20 measurement environment temperature, at the same time, 51 SCM in modern electronic products is widely used and its technology has very mature, can be read out directly measured DS18B20 temperature, and the use of three wire and single-chip microcomputer is linked together, reduce the external hardware circuit, with low cost and easy to use features. Specific using single chip computer AT89C51 as a controller, and temperature sensor DS18B20 as temperature collector, design a kind of digital thermometer. The thermometer can measure-55.5-+ 125 ℃ temperature between. Good upper button, after 18 B20 directly read temperature being measured, data transfer, real time monitoring the current temperature is beyond the set range, and realize the alarm function. With a total of three Yang digital tube to serial data transmission, and realize the temperature display. [Key words] digital thermometer; DS18B20; AT89C51;alarm. 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc314005792 [摘 要] PAGEREF _Toc314005792 \h I HYPERLINK \l _Toc314005793 [Abstract] PAGEREF