【正文】 畢 業(yè) 論 文 (設(shè) 計(jì) ) 中文題目:基于單片機(jī)的 PWM控制方法的精密溫度控制 系統(tǒng)設(shè)計(jì) 英文題目:Design of Precise Temperature Control System Based on PWM Control Method of Microprocessor 姓 名: 姚佑鵬 學(xué) 號(hào): 090701224 專(zhuān)業(yè)班級(jí): 09 電氣工程及其自動(dòng)化 2 班 指導(dǎo)教師: 李衛(wèi)平 提交日期: 20220515 教務(wù)處制惠州學(xué)院 HUIZHOU UNIVERSITY 摘 要本文設(shè)計(jì)了一種以單片機(jī) STC89C52 為核心的精密溫度控制系統(tǒng)?它使用一線制數(shù)字溫度傳感器 DS18B20 采集溫度,并通過(guò)四位數(shù)碼管顯示實(shí)時(shí)溫度?通過(guò)設(shè)置按鍵,設(shè)定恒溫運(yùn)行時(shí)的溫度值,并顯示在數(shù)碼管上?單片機(jī)采用 PID 控制算法對(duì)測(cè)量值和設(shè)定值進(jìn)行處理,計(jì)算輸出 PWM 波控制繼電器調(diào)節(jié)發(fā)熱電路的發(fā)熱功率,最終控制被控對(duì)象溫度?通過(guò)原理分析,軟硬件設(shè)計(jì)及實(shí)驗(yàn)調(diào)試,溫度能夠?qū)崟r(shí)檢測(cè)和自動(dòng)控制,系統(tǒng)的溫度控制精度可達(dá)到177?！?表明該溫度系統(tǒng)比較穩(wěn)定并且精確,能夠?qū)崿F(xiàn)對(duì)溫度的精密控制?關(guān)鍵詞:溫度控制 MCS52 DS18B20 PID PWM Abstract A precise temperature control system with the core of microprocessor STC89C52 is designed in this paper. In this system, onewire digital thermometer DS18B20 is used to transform analog temperature signal to digital signal,through four realtime digital of a digital thermometer setting the button,set the thermostat temperature at the time of operation, and digital display of the Microputer used PID control algorithm to process the data measurement and data settings,and calculate the PWM signal, is outputted and magnified to drive a solid state relay so that the power of heat circuit is the temperature of the object can be control. Through many of theory, design and experiments, the temperature of realtime detection and automatic control test is reached,and the error of this system is 177?！? It show that the system is precise and steady, and control precise temperature.Keywords: Temperature control MCS52 DS18B20 PID PWM 目 錄1 前言 ..............................................................................................................................................................12 設(shè)計(jì)理論基礎(chǔ) ..............................................................................................................................................2 PWM 控制技術(shù) ...................................................................................................................................2 數(shù)字 PID 算法 ..................................................................................................................................23 系統(tǒng)的方案設(shè)計(jì) ..........................................................................................................................................4 系統(tǒng)設(shè)計(jì)內(nèi)容及要求 .......................................................................................................................4 設(shè)計(jì)內(nèi)容 ...............................................................................................................................4 設(shè)計(jì)要求 ...............................................................................................................................4 方案設(shè)計(jì)的比較與論證 ...................................................................................................................44 系統(tǒng)硬件電路的設(shè)計(jì) ..................................................................................................................................6 單片機(jī)最小系統(tǒng)模塊 .......................................................................................................................7 單片機(jī) STC89C52 的簡(jiǎn)介 ....................................................................................................7 單片機(jī)系統(tǒng)模塊的硬件設(shè)計(jì) ............................................................................................10 功能實(shí)現(xiàn)模塊 ................................................................................................................................11 采樣模塊 ............................................................................................................................11 按鍵模塊 ............................................................................................................................12 顯示模塊 ............................................................................................................................13 溫度控制模塊 ................................................................................................................................145 系統(tǒng)軟件設(shè)計(jì) ............................................................................................................................................15 主程序模塊 ....................................................................................................................................15 功能實(shí)現(xiàn)模塊 ................................................................................................................................17 溫度采樣子程序 ................................................................................................................17 顯示子程序 ......................................................................................................................17 運(yùn)算控制模塊 ................................................................................................................................186 系統(tǒng)調(diào)試 ..................................................................