毕业设计论文基于AT89C51单片机的温度控制系统设计.doc

PAGE 单片机温控系统设计 摘 要 本设计是以一个保温箱为控制对象，以AT89C51为控制系统核心，通过单片机系统设计实现对保温箱温度的显示和控制功能。本温度控制系统是一个闭环反馈调节系统，由温度传感器AD590对保温箱温度进行检测，经过调理电路得到合适的电压信号。经A/D转换芯片得到相应的温度值，将所得的温度值与设定温度值相比较得到偏差。通过对偏差信号的处理获得控制信号，去调节加热器的通断，从而实现对保温箱温度的显示和控制。本文主要介绍了保温箱温度控制系统的工作原理和设计方法，论文主要由三部分构成。 = 1 \* GB3 ① 系统整体方案设计。 = 2 \* GB3 ② 硬件设计，主要包括温度检测电路、A/D转换电路、显示电路、键盘设计和控制电路。 = 3 \* GB3 ③ 系统软件设计，软件的设计采用模块化设计，主要包括A/D转换模块、显示模块、键盘模块和控制模块等。 关键词：单片机；传感器；温度检测 DESIGN OF TEMPERATURE CONTROL SYSTEM BASIC ON SINGLE – CHIP COMPUTER ABSTRACT This design takes a heat preservation box as a control object and the AT89C51 as a control system core. A Single-chip Computer system is designed to carry out the temperature display and control. This heat temperature control system is a closed loop feedback control system. The temperature of the heat preservation box is measured by sensor AD590. For AD590, a adjust electric circuit is designed to get a suitable electric voltage signal for the A/D transformation. After the A/D transformation, the corresponding temperature digital quantity can be obtains, and is compared with the setting temperature, then a deviation can be obtained. Through processing the deviation, a control signal will be produced, which adjusts the heater the on or off, thus the preservation box temperature control and display is realized. This design introduces the temperature control system principle of work and the design method. The paper mainly includes by three parts. = 1 \* GB3 ①The system outline project design. = 2 \* GB3 ② Hardware design, the hardware design mainly includes the temperature adaptive electric circuit, the A/D circuit, the display circuit, the keyboard design and the control circuit. = 3 \* GB3 ③ Software design method, the software design uses the modular design, mainly includes the A/D transformation module, the demonstration module, the keyboard module and the control module. Key words: Single-chip Computer；Sensor；Temperature Measurement； 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc170