温度测量及控制系统
论文编号:DZXX111 论文字数:11914,页数:42摘 要
DS18B20是一种可组网数字式温度传感器，根据单总线独特的优点，它可以使用户轻松的组建传感器网络，并可使多点温度测量电路变得简单、可靠。本设计以8位单片机和新型数字传感器为核心组成温度测量及控制系统。本系统采用INTEL MCS-51指令系统的AT89S52单片机作为控制芯片，完成温度值接收、转换、报警处理；由DALLAS出品的新型的单路串行数字温度传感器DS18B20，完成温度测量、分析、判断阈值、输出功能。整个系统具有集成度高、独立性强、抗干扰性强（串行通信特点）、鲁棒性强、可扩展性强（可利用识别序列号组成多点测量）、体积小、功耗低等特点。本系统具有测温、上限报警、下限报警、温度控制及显示功能。基于本系统可扩展如下功能：1.增加键盘使可随时调整温度上下限。2.扩展传感器数量，组成测量网络。实现多点测量。同时对MCS-51单片机系列各芯片进行了优劣势对比、介绍了单线数字温度传感器的基本内部结构及主要性能特点。
关键词：报警，DS18B20，控制
Abstract
DS18B20 is a digital thermometer sensor, which could construct networks, On the of the particular merits of one-wire bus, sensor networks can be built up easily, which make multi-temperature measuring circuits become simpler and more reliable. This design spread with new arithmetic figure to sensor to constitute the temperature to measure and control for core with the machine of 8 single slices system. Single slice of the system's ATMEL AT89C51 of INTEL MCS-51 instruction of adoption of this system machine conduct and actions MICROARRAY , complete the temperature worth receive, conversion, report to the police to handle; New and single road string produced by DALLAS line the arithmetic figure temperature sensor DS18B20, and complete the temperature to measure, analysis, judgment the worth, output function. Whole system has to gather the degree is high, the dependable is strong, anti- the interference is strong (String line correspondence characteristics), can expand the strong (can make use of serial number to identify the preface row), smaller capacity, lower power consumption and so on. This system has the function of the thermometric, upper limit to report to the police, bottom the report to the police, temperature control and show on. According to this system can expand the following function: 1. increase the keyboard to make to can at any time adjust the temperature the top and bottom. 2. Expand to spread to arithmetic quantity, and constitute the diagraph network. Realize many point of diagraph. At the same time to basic and internal construction for machine each proceed order of quality contrast, introducing the temperature of single line arithmetic figure spreading arithmetic and main function characteristics of single slice of MCS-51.
Keywords： Alarm，DS18B20，control
目录
摘 要 I
Abstract II
第1章 绪 论 3
1.1 课题背景及重要意义 3
1.1.1 课题背景 3
1.1.2 重要意义 3
1.2 课程设计的任务 3
第2章 模块方案比较和论证 5
2.1 温度传感器比较 5
2.2 温度控制模块 6
2.3 显示模块 7
第3章 总体设计和主要芯片介绍 10
3.1总体设计 10
3.2 主要芯片介绍 10
3.2.1 DS18B20温度传感器介绍 10
3.2.2 8051单片机介绍 15
3.2.3 1602液晶显示器介绍 17
第4章 系统硬件设计 18
4.1 温度采集模块 18
4.2 温度控制模块 19
4.3 温度显示模块 20
第5章 系统软件设计 21
5.1 软件总体流程图 21
5.2系统主程序 22
5.3显示子程序 22
5.4 读取温度子程序 23
5.5单个字符的读写 24
5.6初始化程序 25
5.8延时程序 28
第6章 毕业设计总结 29
致 谢 30
参考文献 31
附录1 系统原理图 32
附录2 系统程序 33
附录3 温度控制系统实物图 39
附录4 元器件清单 40
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