毕业设计说明书(论文)外文摘要
Title Design of The Control System of Air Conditioner Based On 51 MCU
Abstract This paper introduces a control system of air conditioner based on 51 MCU, which consists of MCU, temperature sensor, conditioning circuit, A/D convert, I/O of button and display circuits. The requirements of this project is to set temperature to control the working condition of the compressor of the air conditioner by buttons or remote control, and to display the instant temperature.
This paper inroduces the background and meaning of this subject first of all, and then summarize the functions of AT89C51 MCU,which is applied in this project, and the design of A/D convert, temperature sensor circuits. For the software, this paper explains the functional implementation of the display section, temperature comparison section and control section. At last, this paper achieves the design of a control system of air conditioner based on 51 MCU by a successful simulation.
Key words: Temperature sensor, MCU, Temperature Control
目 次
1 绪论•1
1.1 研究背景1
1.2 论文的章节安排2
2 方案设计2
2. 1 方案流程设计2
2. 2 方案论证•3
3 硬件设计 ••3
3.1 单片机的选择3
3.2 模数转换器的选择••7
3.3 LM35,ADC0809与AT89C51的连接••11
3.4 显示电路12
3.5 按键控制电路••15
3.7 传感器与放大电路•16
3.7 电机与驱动电路17
3.8 红外遥控电路••17
4 系统软件设计••20
4.1 软件流程20
4.2 软件设计20
4.2.1 I/O口命名•22
4.2.2 主函数•23
4.3.3 延时函数••26
4.3.4 显示函数••26
5 系统调试••27
5.1 仿真软件和开发工具•27
5.1.1 Proteus27
5.1.2 Keil C•30
5.2 初始化调试31
5.3 调试增温减温按钮32
5.4 调试模数转换•34
5.5 调试sw模式选择按键35
结论 ••37
致谢38
参 考 文 献••39
1.绪论
1.1研究背景
空调即空气调节器(room air conditioner),挂式空调是一种用于给空间区域(一般为密闭)提供处理空气温度变化的机组。它的功能是对该房间(或封闭空间、区域)内空气的温度、湿度、洁净度和空气流速等参数进行调节,以满足人体舒适或工艺过程的要求。
空调由以下主要部分组成:
压缩机部分:制冷循环的过程为制冷剂被压缩机由蒸发器吸入的低温、低压、蒸发后的气体进入压缩机吸入口。由压缩机内曲轴箱经电动机驱动,将制冷剂压缩后从排气管路排出的制冷剂变为高温、高压、气体(压缩机排出的制冷剂为高温、高压气体)。