【正文】 .......................................................................................... 1 系統(tǒng)工藝 ..................................................................................................................... 1 設(shè)計的總體目標(biāo) ......................................................................................................... 2 溫度巡檢儀的技術(shù)現(xiàn)狀 ............................................................................................. 3 第二章 系統(tǒng)總體方案設(shè)計 ...................................................................................................... 4 技術(shù)原理 ..................................................................................................................... 4 溫度信號處理 ............................................................................................................. 5 第三章 硬件設(shè)計 ...................................................................................................................... 6 熱電偶的測溫 ............................................................................................................. 6 傳感器分類 ...................................................................................................... 6 熱電偶傳感器 .................................................................................................. 6 熱電偶的工作原理 .......................................................................................... 7 熱電偶測量溫度的方法 .................................................................................. 8 測量信號的放大和冷端補(bǔ)償 .......................................................................... 9 MAX6675 芯片 .......................................................................................................... 10 性能特點(diǎn) ........................................................................................................ 10 工作原理 ....................................................................................................... 11 與單片機(jī)的通訊 ............................................................................................ 12 熱補(bǔ)償與噪聲補(bǔ)償 ........................................................................................ 13 應(yīng)用中的注意問題 ........................................................................................ 14 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計說明書（畢業(yè)論文） V 多通道的巡回切換 ................................................................................................... 14 A/D 轉(zhuǎn)換器 ADC0832 ............................................................................................... 16 單片機(jī)的功能 ........................................................................................................... 18 LED 顯示驅(qū)動設(shè)計 ................................................................................................... 19 數(shù)碼管驅(qū)動 .................................................................................................... 20 數(shù)碼管參數(shù)及應(yīng)用 ........................................................................................ 20 與上位機(jī)的連接串口通信 ....................................................................................... 22 第四章 軟件設(shè)計 .................................................................................................................... 24 軟件設(shè)計流程 ........................................................................................................... 24 數(shù)字信號處理 ........................................................................................................... 25 LED 顯示程序的實(shí)現(xiàn) ............................................................................................... 27 顯示部分流程圖 ............................................................................................ 27 第五章 誤差分析和軟件調(diào)試 ................................................................................................ 30 干擾源的種類 ........................................................................................................... 30 抗干擾措施 ............................................................................................................... 30 系統(tǒng)調(diào)試方法 ........................................................................................................... 32 第六章 總結(jié) ............................................................................................................................ 33 參考文獻(xiàn) .................................................................................................................................. 34 附錄一 設(shè)計硬件電 路 ............................................................................................................ 36 附錄二 系統(tǒng)軟件設(shè)計 ............................................................................................................ 37 致謝 .......................................................................................................................................... 49 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計說明書（畢業(yè)論文） 1 第一章 引言 溫度測量簡述 溫度對于工業(yè)生產(chǎn)的影響是很大的，因?yàn)樵诠I(yè)生產(chǎn)中， 對溫度的要求是很嚴(yán)格的 。 part, which takes charge of municating with Upper machine。系統(tǒng)采用 K 型熱電偶測量技術(shù)和模擬開關(guān)芯片 ， 實(shí)現(xiàn)了多點(diǎn)溫度巡回采集處理的功能 , 應(yīng)用于各種溫度測量場合。 針對目前溫度檢測儀表的現(xiàn)狀，本文設(shè)計了一種以 AT89S52 單片機(jī)為核心的智能溫度巡檢儀，具有自動校準(zhǔn)、串行通信 、 傳感器非線性校正等功能，提高了儀器的智能程度。 . 關(guān)鍵詞： 智能儀器 ；溫度巡檢 儀 ；單片機(jī) ； 熱電偶 內(nèi)蒙古科技大學(xué)畢業(yè)設(shè)計說明書（畢業(yè)論文） III The Thermocouple of temperaturecruising test based on singlechip design Abstract There is much need of multiway temperature measurement, alarm and control in certain industry situations. General temperature measure instrument is not intelligent enough. It has no function of munication, and requires stated signal. Aiming at the current problem, this paper mainly introduces the design of a multiway intelligent temperature measure instrument based on AT89C52 microprocessor. The system has the function of auto adjust, serial munication, and sensor nonlinearity selfcorrection. It adopts threewire measuring technique of thermistor and analog switches to realize multiway tempera