多点温度巡回检测系统

文档编号:DZXX195  文档字数:12248,页数:37

摘要

 目前，市场上普遍存在的温度检测仪器大都是单点测量，而这些温度检测仪都有温度信息传递不及时、精度不够的缺点，这样就不利于工业控制者根据温度变化及时做出决定。在这样的形式下，开发一种能够同时测量多点，并且实时性高、精度高，能够综合处理多点温度信息的测量系统就很有必要。
 而本设计就是以AT89C51单片机系统为核心，能对多点的温度进行实时巡检的系统。该系统主要以AT89C51为中心，是主控制器件。而该系统中多点温度检测的功能则是通过温度传感器DS18B20实现, DS18B20是一种可组网的高精度数字式温度传感器，由于其具有单总线的独特优点，可以使用户轻松地组建起传感器网络，并可使多点温度测量电路变得简单、可靠。所以我相信该系统在诸如粮库测温、智能建筑、中央空调等多种需要多点温度检测的场合具有较好的应用前景。

关键词：温度，多点检测，单片机，DS18B20

ABSTRACT

 Nowadays, temperature-measuring apparatus in the market only can check and measure the temperature of one point, and the temperature information is not real-time and the precision is low. It takes a great of troubles for the industry-controllers to make decision. In this situation, it is very necessary to develop a measuring system which not only can measure several points with high real time and high accuracy, not also can handle the multiple-point’s temperature comprehensively.
 Therefore, this system is designed with Micro-Controller system as the core, which can realize real-time inspection of multiple-point’s temperature. This system takes AT89C51 as core, namely main controlling part. And the function of multiple-point’s temperature measurement is realized by DS18B20. As a kind of high-accuracy digital net temperature sensor，DS18 B20 can be used building a sensor net easily. It can also make the net simple and reliable with it's special 1-wire interface. Thus, I believe that the system has a good application prospect in the circumstances such as grain depots, intelligent building, central air-conditioning, which need multiple-point’s temperature measurement.

Keywords: temperature, Multiple-Point’s Measure, Micro Controller Unit, DS18B20
目录

摘要 I
ABSTRACT II
第1章 引言 1
1.1 背景 1
1.2 意义 1
1.3 研究内容 2
第2章 方案和器件的比较和选择 3
2.1 主控制器件的选择 3
2.2 温度传感器的选择 4
2.3 显示器的选择 6
第3章 系统硬件设计 7
3.1总体方案 7
3.2 AT89C51单片机及其外围电路 8
3.3 DS18B20检测电路 9
3.4 温度显示电路 10
3.5 温度报警电路 10
3.6 按键选择电路 11
第4章 系统软件设计 12
4.1主程序流程图 12
4.2 DS18B20相关程序设计 13
4.2.1 DS18B20的相关时序 13
4.2.2读DS18B20序列号子程序 14
4.2.3 DS18B20的工作流程图 15
4.3 显示程序设计 17
第5章 系统调试和实现 18
5.1系统硬件调试 18
5.2系统软件调试 19
5.3整个系统调试 19
5.4系统实现 19
第6章 结束语 21
致谢 22
参考文献 23
附录 源代码 24

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