基于单片机的温度控制系统硬件设计.doc

基于单片机的温度控制系统硬件设计 【摘 要】随着国民经济的发展，温度控制系统已经被广泛的应用于社会生活的各个领域，如工农业、医疗、家庭、远程控制、环境测控等都需要用到温控系统。其中多采用功能强、体积小、可靠性高、造价低的89C51系列单片机进行温度控制。 本系统是基于MCS-51单片机的空调压缩机的温度控制系统，采用STC89C51作为温控系统的主控芯片，AD590作为温度传感器，外围采用模/数转换器ADC0809，空调压缩机相应电路来完成温控系统的设计。该系统采用多个AD590温度传感器同时对多点温度采样，再将温度信号转换成数字信号送入单片机，最后将得到的温度的平均温度通过LED显示出来。系统实现了空调压缩机的多点温度采样、温度设定、LED显示及温度门限报警的功能。 【关键词】温度控制 STC89C51 AD590 ADC0809 多点采样 LED显示 Design of Temperature Control System Based on SCM 【Abstract】Along With the development of the national economy, temperature control system has been widely used in various areas of social life, such as agricultural and industrial, medical, family, remote control, environmental control, and so on . They are all requiring temperature control system. Where make the use of strong functions, small size, high reliability, low cost of 89C51 series MCU temperature control. This system is based on MCS air-conditioning compressor with temperature control system, using STC89C51 as a temperature control system for the master chip, the AD590 as the temperature sensor, the perimeter with die/number converter ADC0809, air conditioning compressor corresponding circuit to complete temperature control system design. The system uses multiple AD590 temperature sensors at the same time-to-multipoint sample temperature, temperature signals into digital signals into a single chip, with the average temperature of temperature through the LED display. The system enables the air conditioning compressor temperature sampling, temperature setting, led display and temperature threshold alarm functionality. 【Key words】Temperature control STC89C51 AD590 ADC0809 multi-sampling display 目 录 1. 绪论.............................................................................................................................6 1.1 课题研究的目的和意义....................................................................................6 1.2 温度控制的国内外现状...............................................................................