【正文】 菜大棚、花房的溫度監(jiān)測(cè)，程控交換機(jī)室的溫度監(jiān)測(cè)，孵化室溫度監(jiān)測(cè)等等對(duì)環(huán)境溫度要求較嚴(yán)格的場(chǎng)合?？梢钥闯?，儀表在使用、改造、更具有靈活性。這類儀器能夠解決許多傳統(tǒng)儀器不能解決的問(wèn)題，能夠輕 松克服傳統(tǒng)儀器難以避免的缺點(diǎn)，在簡(jiǎn)化儀表電路的同時(shí)，技術(shù)上提高儀表的可靠性、加快新產(chǎn)品的開(kāi)發(fā)速度，經(jīng)濟(jì)上降低儀表的成本。在測(cè)量過(guò)程自動(dòng)化、測(cè)量結(jié)果的數(shù)據(jù)處理以及功能的多樣化等方面，智能儀表的發(fā)展令人瞠目。其一般均具有指示溫度的功能，不同的測(cè)溫原理導(dǎo)致了不同的儀表在記 錄、控制變送、遠(yuǎn)傳、報(bào)警等方面的性能差別很大，也有著難以克服的缺點(diǎn)。伴隨著科學(xué)技術(shù)的日新月異，這類儀表的發(fā)展也極為迅速。 monolithic integrated circuit。s daily life plays an increasingly important role in people39。 數(shù)字式多路溫度采集系統(tǒng) 主要 由主控制器、溫度 的 采 集電路、溫度的 顯示電路、報(bào)警控制電路 以 及鍵盤(pán)輸入控制電路組成。哈爾濱理工大學(xué)學(xué)士學(xué)位論文 I 基于 單片機(jī)的溫度 測(cè)量系統(tǒng)設(shè)計(jì) 摘要 在工業(yè)生產(chǎn)中，溫度是最基本的檢測(cè)參數(shù)之一，溫度的檢測(cè)和控制直接和安全生產(chǎn)、產(chǎn)品質(zhì)量、生產(chǎn)效率、節(jié)約能源等重大技術(shù)指標(biāo)相聯(lián)系。它利用單片機(jī)AT89C51 做 為它的 控制及數(shù)據(jù)處理器、智能溫度傳感器 DS18B20 做溫度檢測(cè)器、 LED 數(shù)碼顯示管做溫度顯示輸出設(shè)備 ， 可通過(guò)鍵盤(pán)進(jìn)行簡(jiǎn)單控制，并具有報(bào)警功能。s daily life, it has a great impact, so the measurement for temperature acquisition and control system design and research are very important. With the development of semiconductor technology, takes the SCM as the subject, puter technology and measurement control technology which is bined of intelligent instrument in production to be widely applied. Digital multichannel temperature acquisition system mainly consists of main controller, the temperature collection circuit, a temperature disp lay circuit, an alarm control circuit and a keyboard input control circuit. It uses singlechip AT89C51 as its control and data processor, intelligent temperature sensor DS18B20temperature detector, the LED digital display tube temperature display on an output device,can be controlled by the keyboard,and with the function of warning. It has the following advantages: the hardware circuit has the advantages of simple structure, low production cost, wide range of temperature measurement, temperature measurement of a high precision data, not only display intuitive, easy to use, has a strong practical value. Keywords numeral。 哈爾濱理工大學(xué)學(xué)士學(xué)位論文 III 目錄 摘要 ....................................................................................................................... I Abstract ................................................................................................................II 第 1 章 緒論 ........................................................................................................ 1 課題背景 ................................................................................................... 1 溫度檢測(cè)類儀表的現(xiàn)狀 .................................................................... 1 課題的提出 ........................................................................................ 2 系統(tǒng)的設(shè)計(jì)要求和課題分析 ................................................................... 4 系統(tǒng)的主要技術(shù)指標(biāo) ........................................................................ 4 課題分析 ............................................................................................ 4 第 2 章 多路溫度測(cè)量系統(tǒng)的設(shè)計(jì)方案 ............................................................ 6 方案的比較與論證 ................................................................................... 6 溫度傳感器的選擇 ............................................................................ 6 主控芯片的選擇 ................................................................................ 7 顯示部分的選擇 ................................................................................ 8 方案選定 ................................................................................................... 9 第 3 章 系統(tǒng)的硬件設(shè)計(jì) .................................................................................. 10 溫度采集電路的設(shè)計(jì) ............................................................................. 10 DS18B20 簡(jiǎn)介 .................................................................................. 11 溫度采集電路結(jié)構(gòu) .......................................................................... 14 單片機(jī)控制電路設(shè)計(jì) ............................................................................. 15 關(guān)于單片機(jī) AT89C51 ..................................................................... 15 單片機(jī)工作基本電路設(shè)計(jì) .............................................................. 18 輸入控制電路設(shè)計(jì) ................................................................................. 19 顯示電路設(shè)計(jì) ......................................................................................... 20 數(shù)碼顯示管靜態(tài)顯示工作原理 ...................................................... 20 顯示電路結(jié)構(gòu) .................................................................................. 20 顯示電路工作過(guò)程 .......................................................................... 21 報(bào)警控制電路設(shè)計(jì) ................................................................................. 21 報(bào)警控制電路結(jié)構(gòu) .......................................................................... 21 報(bào)警控制電路工作過(guò)程 .................................................................. 22 電源電路設(shè)計(jì) ......................................................................................... 22 數(shù)字式多路測(cè)量系統(tǒng)電路圖 ................................................................. 23 數(shù)字式多路溫度測(cè)量系統(tǒng)元件清單 ..................................................... 23 哈爾濱理工大學(xué)學(xué)士學(xué)位論文 IV 第 4 章 數(shù)字式多路溫度測(cè)量系統(tǒng)程序設(shè)計(jì) .................................................. 24 軟件設(shè)計(jì)總論 ......................................................................................... 24 軟件設(shè)計(jì)的一般方法 ...................................................................... 24 程序流程圖 設(shè)計(jì) .............................................................................. 24 匯編語(yǔ)言的產(chǎn)生及特點(diǎn) .................................................................. 24 主程序設(shè)計(jì) ............................................................................................. 25 子程序設(shè)計(jì) ............................................................................................. 26 DS18B20 的通信協(xié)議 ...................................................................... 26 子程序 .............................................................................................. 27 數(shù)字式多路溫度測(cè)量系統(tǒng)源程序 ......