1、基于单基于单片机原理温度控制系统片机原理温度控制系统的设计的设计 摘要摘要：近年来随着计算机在社会领域的渗透, 单片机的应用正在不断地走向深 入，同时带传统控制检测日新月益更新。在实时检测和自动控制的单片机应用系 统中，单片机往往是作为一个核心部件来使用，仅单片机方面知识是不够的，还 应根据具体硬件结构，以及具体应用对象特点的软件结合，以作完善。 本文从硬件和软件两方面来讲述水温自动控制过程,在控制过程中主要应用 AT89C51、ADC0809、LED 显示器、LM324 比较器，而主要是通过 DS18B20 数字温 度传感器采集环境温度，以单片机为核心控制部件，并通过四位数码管显示实时 温度
2、的一种数字温度计。软件方面采用汇编语言来进行程序设计，使指令的执行 速度快，节省存储空间。为了便于扩展和更改，软件的设计采用模块化结构，使 程序设计的逻辑关系更加简洁明了，使硬件在软件的控制下协调运作。 而系统的过程则是：首先,通过设置按键,设定恒温运行时的温度值，并且用数码 管显示这个温度值.然后,在运行过程中将采样的温度模拟量送入 A/D 转换器中进 行模拟-数字转换， 再将转换后的数字量用数码管进行显示， 最后用单片机来控制 加热器,进行加热或停止加热，直到能在规定的温度下恒温加热。 关键词：单片机系统；传感器；数据采集；模数转换器；温度 Abstract In recent years
3、, with the computer penetration in the social field, the application of SCM is to keep at the same time, traditional control testing update on Crescent benefits. In real-time detection and automatic control system of single-chip applications, often as a single-chip core component to use only single-
4、chip is not enough knowledge, but also the specific hardware structure and the specific features of application software objects combine to make perfect. In this paper, both hardware and software for automatic control of water temperature on the process, in the control of the main application of the
5、 process of AT89C51, ADC0809, LED display, LM324 comparator, but mainly through the digital temperature sensor DS18B20 collecting ambient temperature to single-chip microcomputer as the core control components, and through four real-time digital display of a digital thermometer temperature. Software
6、 using assembly language for programming, so that the implementation of Directive speed, to save storage space. In order to facilitate the expansion and changes to the design of modular software structure, so that the logic of the relationship between program design more concise,Hardware software co-operation under the control of it. And systematic process is: First of all, by setting the button, set the thermostat temperature at the time of operation, and digital display of the temperature. T
