【正文】 行業(yè)的水路溫度保護(hù)，變電所各電節(jié)點(diǎn)的溫度檢測(cè)等，要求溫度巡檢儀能自動(dòng)巡檢，以達(dá)到無(wú)人看守，溫度自動(dòng)巡檢的目的。關(guān)鍵詞：?jiǎn)纹瑱C(jī) STC89C52， 溫度傳感器 PT100，模數(shù)轉(zhuǎn)換器 ADC0809，液晶顯示器 1602河南城建學(xué)院本科畢業(yè)設(shè)計(jì)(論文) AbstractIIAbstractTemperature is an essential of environmental factors in our actual production，living and many other fields. It’s particularly important to control and detect the temperature promptly and exactly. With the development of the national economy, people need to all in the furnace, heat treatment furnace, chemical and biological monitoring of the temperature of the greenhouse and control. Singlechip puter to control not only has control of their convenience, simplicity and flexibility advantages, but also substantial increase in temperature was charged with technical indicators, which can greatly improve the quality and quantity of products.This is the software program based on the hardware part of the smart temperature data logging devices, with the hardware part of the bination of realtime temperature measurement and control. The hardware part is based on the platinum resistance PT100 temperature sensor, the method of constant current temperature, by microcontroller STC89C52 control, amplifier, A/D converter temperature signal acquisition, collected by the microcontroller signal sent to the LCD1602 to be displayed on the button to adjust the temperature, the lower limit. The software part modular, the program for some of the features of the hardware circuit and the resistance temperature scale conversion of the collected temperature data filtering, realtime temperature measurement and control.Key words: STC89C52, temperature sensorPT100, Analog ADC0809, LCD 1602河南城建學(xué)院本科畢業(yè)設(shè)計(jì)(論文) 目錄III目 錄摘 要 ........................................................................................................................IAbstract....................................................................................................................II前 言 ........................................................................................................................11 概述 ......................................................................................................................2 溫度檢測(cè)儀表的現(xiàn)狀 ....................................................................................2 課題的提出 ....................................................................................................3 本文的主要研究?jī)?nèi)容 ....................................................................................42 系統(tǒng)的總體設(shè)計(jì) ....................................................................................................5 系統(tǒng)的總體設(shè)計(jì)思想 ....................................................................................5 方案論證與選擇 ............................................................................................5 溫度采樣和測(cè)試部分 .............................................................................6 顯示器 .....................................................................................................6 鍵盤(pán) .........................................................................................................7 系統(tǒng)設(shè)計(jì)的技術(shù)關(guān)鍵 ....................................................................................73 系統(tǒng)的硬件設(shè)計(jì) ..................................................................................................8 系統(tǒng)的整體結(jié)構(gòu) ............................................................................................8 溫度巡檢儀的主要硬件 ................................................................................8 溫度傳感器 PT100 .................................................................................8 A/D 轉(zhuǎn)換器 ADC0809...........................................................................10 STC89C52 ..............................................................................................12 LCD1602 ................................................................................................164 計(jì)算與軟件實(shí)現(xiàn) ..................................................................................................19 溫度采集 ......................................................................................................19 數(shù)據(jù)輸入 ...............................................................................................19 A/D 采集信號(hào) ........................................................................................20 數(shù)據(jù)處理 ......................................................................................................23 電壓— PT100 阻值轉(zhuǎn)換 .......................................................................23 AD 值— 十進(jìn)制數(shù)轉(zhuǎn)換 .........................................................................24 通過(guò)插值算法校正 PT100 的非線性度 ..............................................24 去極值平均濾波法 ...............................................................................25河南城建學(xué)院本科畢業(yè)設(shè)計(jì)(論文) 目錄IV 溫度顯示 ......................................................................................................27 報(bào)警控制 ......................................................................................................29 溫度上、下限設(shè)定 ...............................................................................29 越限報(bào)警 ...............................................................................................33 小結(jié) ..............................................................................................................345 電路仿真的設(shè)計(jì)與分析 ......................................................................................35 Proteus 仿 真軟件介紹 ..................................................................................35 電路仿真設(shè)計(jì) ..............................................................................................35 仿真分析 ......................................................................................................376 總結(jié) ......................................................................................................................38參考文獻(xiàn) ............