【正文】 production process, often require various types of furnace, heat treatment furnace, reactor temperature detection and regulation, so it needs a proper system of precise control of its temperature, as low power consumption single chip, high performance, reliability, easytomarket modity and so on, so to control the temperature using SCM not only save on cost, control method of flexible and diverse, and can achieve higher precision, which can greatly enhance the quality of the product, so SCM is widely used in the Small control system. In this study, the Temperature Control System design. As a typical application Temperature Control System is the integrated use of the puter theory, control theory, analog electronics, digital control technology, keyboard, display technology, and many other areas of knowledge. Temperature sensor uses digital temperature sensor DS18B20, realtime sampling of the temperature and analog signals into digital signals back to the SCM. System can be preset through the keyboard on the temperature, microcontroller based on the current temperature and the preset temperature of the furnace operation, PWM control output square wave with adjustable width, and thus control the triac onand off to regulate the electric wire heating power, so that the water temperature quickly reach and maintain constant preset value. The design process, first of all the software design and development, making the system functional module and through the Proteus software simulation, respectively, to achieve feature an integrated design of the hardware, and repeated demonstration, testing the device parameters to make it stable operation, and ultimately make This system has realized the constant temperature control. Keywords: MCS51, temperature sensor, SCR,temperature control 沈陽(yáng)航空航天大學(xué)畢業(yè)設(shè)計(jì)（論文） III 目 錄 1 緒論 ................................................................................................................................... 1 簡(jiǎn)介 ............................................................................................................................. 1 課題研究的內(nèi)容及要求 ............................................................................................. 2 課題的主要研究的內(nèi)容 ...................................................................................... 2 本系統(tǒng)的功能 ...................................................................................................... 3 本文的主要內(nèi)容 ......................................................................................................... 3 方案 1.......................................................................................................................... 4 方案 2.......................................................................................................................... 4 方案論證 ..................................................................................................................... 5 2 電阻爐溫度控制系統(tǒng)工作原理 ....................................................................................... 6 溫度控制總體設(shè)計(jì)方案 ............................................................................................. 6 溫度傳感器模塊 ......................................................................................................... 7 DS18B20 基本知識(shí) .............................................................................................. 7 DS18B20 產(chǎn)品的特點(diǎn) .......................................................................................... 8 DS18B20 的引腳介紹 .......................................................................................... 8 DS18B20 的 4 個(gè)主要部件 ................................................................................ 10 溫度采集模塊電路圖 ........................................................................................ 12 數(shù)據(jù)處理模塊 ........................................................................................................... 13 單片機(jī)的發(fā)展方向 ............................................................................................ 13 STC89C52 系列主要性能參數(shù) .......................................................................... 13 STC89C52 存儲(chǔ)器配置 ...................................................................................... 17 溫度顯示模塊 /設(shè)定模塊 .......................................................................................... 21 溫度顯示部分 .................................................................................................... 22 溫度設(shè)定部分 .................................................................................................... 26 溫度顯示 /設(shè)定模塊電路圖 ............................................................................... 26 基于單片機(jī)的電阻爐溫度控制系統(tǒng)設(shè)計(jì) IV 溫度控制模塊 ........................................................................................................... 28 可控硅 BTA16.................................................................................................... 28 光電偶合器 MOC3021 ...................................................................................... 31 溫度控制模塊電路圖 ........................................................................................ 32 3 系統(tǒng)軟件設(shè)計(jì) ................................................................................................................. 33 系統(tǒng)主程序 ............................................................................................................... 33 溫度采集子程序 ....................................................................................................... 34 顯示子程序 ............................................................................................................... 34 溫度設(shè)定子程序 ....................................................................................................... 34 控制算法 ................................................................................................................... 35