温度箱模拟控制系统

论文编号:JD894  附开题报告,任务书,原理图,PCB,论文字数:9189,页数:29

摘  要  温度是日常生活中无时不在的物理量，温度的控制在各个领域都有积极的意义。很多行业中都有大量的用电加热设备，如用于热处理的加热炉，用于融化金属的坩锅电阻炉及各种不同用途的温度箱等，采用单片机对它们进行控制不仅具有控制方便、简单、灵活性大等特点，而且还可以大幅度提高被控温度的技术指标，从而能够大大提高产品的质量。因此，智能化温度控制技术正被广泛地采用。
本温度设计采用现在流行的AT89S51单片机，配以DS18B20数字温度传感器，该温度传感器可自行设置温度上下限。单片机将检测到的温度信号与输入的温度上、下限进行比较，由此作出判断是否启动继电器以开启设备。
本设计还加入了常用的数码管显示及状态灯显示灯常用电路，使得整个设计更加完整，更加灵活。该设计已应用于花房，可对花房温度进行智能监控。

关键词  温度箱；AT89S51；单片机；控制；模拟；系统

Temperature control system simulation box

Abstract  The temperature is constantly in the daily life of physical and temperature controls in various fields have a positive meaning. A lot of businesses have a lot of power heating equipment, such as that used for the heat treatment furnace, for melting metal crucible resistance heaters and the various uses of temperature bins, SCM using their right to control not only easy to control, simple, such as the characteristics of flexibility, but can also significantly increase the temperature was charged with the technical indicators, which can greatly enhance the quality of the products. Therefore, intelligent temperature control technology is being widely adopted.
The temperature was designed with the now popular AT89S51 SCM, and with DS18B20 digital temperature sensor, The temperature sensor can set up their own temperature collars. SCM will detect that the temperature of the input signal and temperature, the lower comparisons this judgment whether to activate the relay to open the equipment.
The design also includes commonly used digital display and control state lights commonly used circuit, making the whole design more complete, more flexible. The design has been applied to someone, to someone intelligent temperature control.
Key word  Temperature; AT89S51; SCM; Control; Simulation; System

目    录
引言…………………………………………………………………………………  1
温度控制系统设计的意义………………………………………………………  1
温度控制系统的设计背景………………………………………………………  1
温度控制系统的设计目的………………………………………………………  1
温度控制系统完成的功能………………………………………………………  1
第一章 总体设计方案……………………………………………………………… 2
1.1方案一………………………………………………………………………… 2
1.2方案二………………………………………………………………………… 2
1.3方案二的总体设计…………………………………………………………… 2
第二章 DS18B20温度传感器简介………………………………………………… 6
2.1温度传感器的历史及简介…………………………………………………… 6
2.2 DS18B20工作原理…………………………………………………………… 6
2.2.1 DS18B20的工作时序…………………………………………………… 6
2.2.2 ROM操作命令 ………………………………………………………… 7
2.3 DS18B20的测温原理………………………………………………………… 8
2.3.1 DS18B20的测温原理…………………………………………………… 8
2.3.2 DS18B20的测温流程…………………………………………………… 9
第三章 单片机接口设计……………………………………………………………10
第四章 系统整体设计………………………………………………………………11
4.1系统硬件电路设计……………………………………………………………11
4.1.1主板电路设计(如附录2)…………………………………………………11
4.1.2各部分电路 ………………………………………………………………11
4.2系统软件设计…………………………………………………………………12
4.2.1 系统软件设计的整体思想………………………………………………13
4.2.2 系统程序流程图…………………………………………………………13
  4.3调试  …………………………………………………………………………18
结束语 ………………………………………………………………………………20
致谢 …………………………………………………………………………………21
参考文献 ……………………………………………………………………………21
附录   ………………………………………………………………………………22