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毕业设计-基于MCS-51的多路温度检测系统的模拟设计与实现，共83页，20756字，附外文翻译、答辩PPT
摘要
在现代工业生产过程中，温度、电流、压力、电压、流量等已经成为一个必
不可少的技术参数，与现代化大生产紧密联系在一起。温度的检测和控制更是涉
及安全生产、产品质量、生产效率、能源优化等方面，而温度检测工具则因此得
到了广泛应用和人们的重视。由于传统的温度测量仪器响应慢、精度低、可靠性
差、效率低下，难以适应现代化工业的发展进程。目前，随着技术的进步，计算
机的迅猛发展，以单片机为核心的微型计算机嵌入式系统已广泛应用于工业控制
领域，为温度的测量提供了新的解决路径。
本报告详尽地介绍了基于 MCS-51 单片机和 DS18B20 的多路温度测量系统的
设计、电路原理、程序以及软件仿真过程。MCS-51 系列单片机以其功能强、兼
容性好而闻名，而数字式温度传感器 DS18B20 则因其高精度著称，二者结合为
本设计提供了 良好基本 功能。此 多路温度 测量系统 则以 MCS-51 系列中的
AT89C52 单片机为控制核心、智能温度传感器 DS18B20 为温度测量元件、
LCD1602 液晶显示器为显示模块，通过编写 C 语言实现温度的多路检测与报警
功能。该系统程序包含主程序，显示程序，温度检测程序以及报警程序等，能够
满足高精度、优良的实用性和多路检测等要求，可广泛应用于高温报警、远距离
多点测温监查等诸多领域。
关键词：温度，多路检测，单片机，智能温度传感器

ABSTRACT
In the modern industrial production process, temperature and current, pressure,
voltage, flow rate controlled quantities have become an essential technical parameters,
closely linked with the modernization of large-scale production. The detection and
control of temperature is related to production safety, product quality, production
efficiency, energy optimization and so on, while the temperature detection tools are so
widely used and attention. Because of the temperature measuring instrument and
traditional slow response, low accuracy, poor reliability, low efficiency, difficult to
adapt to the development of modern industry. At present, with the development of
technology, the rapid development of computer technology, microcomputer embeded
system based on MCU has been widely used in industrial control field, provides a
new path for temperature measurement.
The report detailed introduced the design, multi-channel temperature measurem-
ent system of MCS-51 and DS18B20 circuit principle, procedure and process based
on software simulation. MCS-51 series microcontroller with its strong function, good
compatibility and famous, and the digital temperature sensor DS18B20 because of its
high precision is known, the combination of the two in order to provide good basic
functions of the design. The multi channel temperature measurement system to
MCS-51 series of AT89C52 single chip microcomputer as control core, intelligent
temperature sensor DS18B20 as the temperature measuring element, LCD1602
display module, written by C and multiplex detection alarm function of temperature.
The system program includes main program, display program, temperature detection
and alarm procedures, can meet the requirements of high precision, good
practicability and multiplex detection requirements, can be widely applied to high
temperature, remote multi-point temperature monitoring control and many other
fields.
KEY WORDS: temperature,multi-point detection,microcontroller,intelligent
temperature sensor

目录
第一章 绪论.................................................................................................................. 1
1.1 基于单片机的多路温度检测系统概述 ............................................................ 1
1.1.1.单片机技术概念........................................................................................ 1
1.1.2 温度传感器技术概念................................................................................ 1
1.1.3.基于 MCS-51 的多路温度检测系统........................................................ 2
第二章 基于 MCS-51 的多路温度检测系统的总体结构设计 .................................3
2.1 系统总体结构方案设计与论证 ........................................................................ 3
2.1.1 方案一........................................................................................................ 3
2.1.2 方案二........................................................................................................ 3
2.1.3 方案分析论证............................................................................................ 3
2.2 系统结构方框图 ................................................................................................ 4
2.3 系统的硬件选用 ................................................................................................ 4
2.3.1 MCS-51 单片机......................................................................................... 4
2.3.2 液晶显示模块 LCD1602.......................................................................... 5
2.3.3 温度传感器 DS18B20 .............................................................................. 6
2.3.4 其他部分元器件选用............................................................................... 6
2.3.5 硬件选用列表及代号............................................................................... 7
2.4 系统总体原理综述 ............................................................................................ 8
2.4.1 系统总体原理及电源选择........................................................................ 8
2.4.2 系统整体仿真图........................................................................................ 8
第三章 系统各模块设计 ............................................................................................. 9
3.1 主控制模块 ........................................................................................................ 9
西北工业大学明德学院本科毕业设计论文
3.1.1 单片机 AT89C52 ....................................................................................... 9
3.1.2 时钟电路..................................................................................................10
3.1.3 复位电路.................................................................................................. 11
3.2 温度采集模块 ..................................................................................................11
3.2.1 温度传感器 DS18B20 结构 .................................................................... 12
3.2.2 DS18B20 主要组成部分及其功能 ......................................................... 13
3.2.3 DS18B20 的工作原理及应用 .................................................................15
3.3 显示模块 .......................................................................................................... 17
3.3.1 模块结构详解.......................................................................................... 17
3.3.2 液晶显示器 LCD1602 的引脚及功能.................................................... 18
3.3.3 液晶显示器 LCD1602 的工作原理........................................................ 19
3.4 报警模块 .......................................................................................................... 22
3.4.1 光学报警功能-LED 指示灯的作用 ....................................................... 22
3.4.2 蜂鸣器的声音报警提示.......................................................................... 22
3.5 按键模块.......................................................................................................... 23
第四章 系统软件设计 ............................................................................................... 24
4.1 系统总体程序结构、流程图及编程 .............................................................. 24
4.2 系统 I/O 口分配............................................................................................... 25
4.3 核心功能模块程序设计 .................................................................................. 26
4.3.1 温度采样模块流程图及程序..................................................................26
4.3.2 温度显示模块流程图及程序..................................................................29
4.4 辅助功能软件设计 .......................................................................................... 34
4.4.1 声光报警模块流程图及程序..................................................................34
4.4.2 按键扫描及中断功能设置...................................................................... 35
第五章 仿真调试 ....................................................................................................... 41
5.1 调试环境 PROTUES 和 K EIL 软件简述 ............................................................ 41
5.1.1 仿真软件 Protues..................................................................................... 41
5.1.2 编程调试软件 Keil.................................................................................. 41
西北工业大学明德学院本科毕业设计论文
5.2 PROTUCES 和 KEIL 关联调试 ........................................................................... 41
5.2.1 系统初始化，多路温度显示..................................................................42
5.2.2 温度超限报警指示.................................................................................. 43
5.2.3 按键功能仿真实现.................................................................................. 44
第六章 全文总结 ....................................................................................................... 46
参考文献...................................................................................................................... 47
致谢.............................................................................................................................. 48
毕业设计小结.............................................................................................................. 49
附录.............................................................................................................................. 50