【正文】 安徽工業(yè)大學(xué) 畢業(yè)論文 摘要 到目前位置，我國的溫度測(cè)量?jī)x器仍然是以水銀溫度計(jì)為主，這種測(cè)量?jī)x器存在很多缺點(diǎn)，如精度低，測(cè)量時(shí)間長，不安全等。本課題所研究的紅外測(cè)溫系統(tǒng)能實(shí)現(xiàn)人體溫度的近距離或遠(yuǎn)距離準(zhǔn)確測(cè)量。該設(shè)計(jì)以 STC89C52 單片機(jī)為核心部件。利用非接觸式溫度傳感器 OTP538U 對(duì)溫度進(jìn)行采樣。得到的電信號(hào)經(jīng)過四運(yùn)算放大器芯片 LM324 前置放大后送至 A/D 模塊， A/D 采用 12 位高精度的 TLC2543 芯片，數(shù)字信號(hào)傳送到主控芯片 STC89C52，并由微處理器完成數(shù)據(jù)采集和轉(zhuǎn)換，實(shí)現(xiàn)溫度的實(shí)時(shí)測(cè)量 并實(shí)時(shí)顯示在 LCD1602 模塊上。 本文所研究的非接觸傳感器單片機(jī)測(cè)溫系統(tǒng)由于對(duì)被測(cè)物體的紅外輻射進(jìn)行的是非接觸無損測(cè)量，測(cè)量過程中不會(huì)擾亂被測(cè)部分的溫度場(chǎng)，響應(yīng)快，溫度分辨率高，穩(wěn)定性好和使用壽命長等一系列的優(yōu)點(diǎn)，比傳統(tǒng)的接觸式測(cè)溫有更多的場(chǎng)合適應(yīng)性。 關(guān)鍵詞： STC89C52；非接觸傳感器； LM324；紅外輻射 安徽工業(yè)大學(xué) 畢業(yè)論文 ABSTRACT So far ,our country’s temperature measuring instrument is still a mercury thermometer mainly. This kind of measuring instrument has many shorting,such as low time long,unrest subject of the infrared temperature system can realize the body temperature close 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 引腳功能說明 .........................................................................7 看門狗應(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