康基高毕业论文.doc

基于单片机的温度监控系统
摘要:温度控制在各个行业运用广泛,在化工、冶金、医药、食品和实验室等众多领域里都有涉及。温度的高低直接影响到产品的质量及使用寿命,因此在实际应用中对温度都要求严格控制,对于温度的精确度和稳定性均有较高的要求。随着控制理论和电子技术的发展,工业控制器的适应能力增强和高度智能化正逐步成为现实。其中以单片机为核心对温度进行控制简单直接、精度高、控制灵活、成本低。
本系统是以AT89S52单片机为主控制单元,并采用数字温度传感器DS18B20采集现场温度数据而设计的远程温度控制系统。该系统具有对监控对象温度的实时采集并显示;按键设置上、下限温度值;超出设定温度范围,自动报警并能通过外部设备控制温度等功能。该系统结构新颖,电路简单,控制方便。
关键词:单片机; 温度传感器; 温度检测; 温度控制
Temperature Monitoring System Based on Single-chip puter
Abstract:Temperature control is used in each industry application, in the chemical industry, metallurgy, medicine, food and laboratory in many fields are involved. The temperature of a direct impact on the quality of the product and service life, so in actual usage is strictly control the temperature required, the temperature of the precision and stability for all have higher requirements. The control theory and the development of electronic technology, industrial controller adaptability and highly intelligent gradually e a reality. One based on singlechip temperature control of high precision, simple and direct control of flexible and low cost.
This system is mainly at89s52 monolithic integrated circuits to control unit, and the temperature sensors ds18b20 the digital data collected from the design temperature control systems. This system is to monitor the temperature of the real-time data acquisition and object. Button, it controls upper and lower limit value temperature. If it beyond the range of temperature, it must automatic alarm and through external temperature control device to control the temperature. The system structure, control circuit is simple and convenient.
Key words:microcontroller, temperature sensor, temperature measure,
temperature control
第1章绪论
概述
温度是生活及生产中最基本的物理量,它表征的是物体的冷热程度。自然界中任何物理、化学过程都紧密的与温度相联系。在很多生产过程中,温度的测量和控制都直接和安全生产、提高生产效率、保证产品质量、节约能源等重大技术经济指标相联系。因此,温度的测量与控制在国民经济各个领域中均受到了相当程度的重视。
在实际的生产实验环境下,由于系统内部与外界的热交换是难以控制的,其他热源的干扰也是无法精确计算的,因此温度量的变化往往受到不可预测的外界环境扰动的影响。为了使系统与外界的能量交换尽可能的符合人们的要求,就需要采取其他手段来达到这样一个绝热的目的,例如可以让目标系