【正文】 distanceor distance measured design for the STC89C52 singlechip microputer as the core ponent. Use contactless temperature preach OTP538U temperature in amplifier chip LM324 will sent electrical signals to the A/D module after preamplification,A/D and 12 of the high accuracy of TLC2543 chip,digital signals to control STC89C52core,and the microprocessor plete data collection and conversion,realize realtime temperature measurement and real –time display to LCD1602 module. This paper studies the contact signalchip microputer temperature measurement system because of the object to be tested for infrared radiation is the contact nondestructive measurement, the measurement process won’t disrupt the measured part of the temperature field,fast response,temperature high resolution,good stability and long service life and a series of asvantages,than traditional contact temperature measurement have more situations adaptability. KEY WORDS : STC89C52； Non contact sensor； LM324； Infrared radiation 安徽工業(yè)大學(xué) 畢業(yè)論文 目 錄 第 1 章 緒論 .............................................................................................................................1 研究課題背景 ...................................................................................................................1 第 2 章 紅外測(cè)溫儀 概述 .........................................................................................................2 紅外測(cè)溫儀簡(jiǎn)介 .......................................................................................................2 紅外線測(cè)溫儀的優(yōu)點(diǎn) ...............................................................................................2 紅外測(cè)溫儀工作原理及測(cè)溫方法 ...........................................................................2 第 3 章 系統(tǒng)硬件設(shè)計(jì) .............................................................................................................4 硬件設(shè)計(jì)概述 ...........................................................................................................4 單片機(jī) STC89C52 模塊 .............................................................................................5 MCS51 單片機(jī)內(nèi)部結(jié)構(gòu) ...............................................................................5 STC89C52RC 單片機(jī)介紹 .............................................................................5 STC89C52RC 單片機(jī)的工作模式 .................................................................6 STC89C52RC 引腳功能說(shuō)明 .........................................................................7 看門(mén)狗應(yīng)用 ...................................................................................................10 紅外測(cè)溫模塊 ..........................................................................................................10 特性 ................................................................................................................10 應(yīng)用 ...............................................................................................................10 傳感器特性 ................................................................................................... 11 實(shí)用連接電路圖 ............................................................................................13 放大電路模塊 .........................................................................................................14 LM324 的引腳排列 .......................................................................................14 參數(shù)與描述 ...................................................................................................14 特點(diǎn) ................................................................................................................15 應(yīng)用電路 .......................................................................................................16 A/D 轉(zhuǎn)換模塊 ..........................................................................................................17 TLC2543 的特點(diǎn) ...........................................................................................17 TLC2543 的引腳排列及說(shuō)明 .......................................................................17 接口時(shí)序 .......................................................................................................18 應(yīng)用電路 .......................................................................................................20 電源模塊 .................................................................................................................20 整流橋 ............................................................................................................21 應(yīng)用電路圖 ...................................................................................................22 液晶顯示模塊 .........................................................................................................22 管腳功能 .......................................................................................................23 特性 ...............................................................................................................24 應(yīng)用電路 .......................................................................................................25 第 4 章 系統(tǒng)軟件設(shè)計(jì) ...........................................................................................................26 總體設(shè)計(jì) .................................................................................................................26 A/D 轉(zhuǎn)換單元時(shí)序 ..................................................................................................27 TLC2543 控制字 ...........................................................................................27 工作流程 .......................................................................................................28 LM324 模塊 ..............................................................................................................31 安徽工業(yè)大學(xué)