【正文】 by one, the system can facilitate the realization of the temperature acquisition and display, and can be arbitrarily set the upper and lower limit alarm temperature, it is very convenient to use, with high precision, high sensitivity, small sizesuitable for low power consumption advantages in our daily life and work, the temperature measurement in the agricultural production, can also be used as the temperature processing module is embedded in other systems, and other auxiliary expansion.Key words: temperature detection。 structure and connection of the detection device hardware。對各部分的電路也一一進行了介紹,該系統(tǒng)可以方便的實現(xiàn)溫度采集和顯示，并可根據(jù)需要任意設(shè)定上下限報警溫度，它使用起來相當方便，具有精度高、靈敏度高、體積小、功耗低等優(yōu)點，適合于我們?nèi)粘Ｉ詈凸ぁ⑥r(nóng)業(yè)生產(chǎn)中的溫度測量，也可以當作溫度處理模塊嵌入其它系統(tǒng)中，作為其他主系統(tǒng)的輔助擴展。其次利用 AT89C51 單片機對多個檢測點進行巡回檢測，選用精度高，工作穩(wěn)定的數(shù)字傳感器 DS18B20 進行溫度采集。本次畢業(yè)設(shè)計內(nèi)容就是配合系統(tǒng)檢測精度要求，選用相關(guān)控制微處理器；檢測裝置硬件的結(jié)構(gòu)及連接；檢測程序的編制；完成成品調(diào)試和演示。溫度檢測系統(tǒng)在人們的生產(chǎn)生活中的應(yīng)用十分廣泛。本科畢業(yè)設(shè)計論文題目： 基于單片機多路溫度巡回檢測儀設(shè)計完成時間：2022 年6 月 10日Southwest Petroleum University 學(xué)生姓名 xxxx 學(xué)　 號 xxxx教學(xué)院系 電氣信息學(xué)院專業(yè)年級 自動化 2022 級指導(dǎo)教師 xxxxx單　 　位 xxxxxxxIIGraduation ThesisDesigned based on singlechip multichannel Temperature Data LoggersGrade: 2022 Name: Liu WeijianSpeciality: AutomationInstructor: Zhang PeizhiSchool of Electronics and Information EngineeringJune 10, 2022摘要隨著計算機技術(shù)和傳感器的發(fā)展，在生產(chǎn)和日?；顒又?，人們對溫度模擬物理量的測量要求越來越高。工業(yè)、農(nóng)業(yè)自動化水平也迅速提高，單片機的應(yīng)用也III越來越廣泛，作用也越來越來顯著。本課題溫度檢測實際應(yīng)用為出發(fā)點，結(jié)合單片機微處理器技術(shù)，提出了基于單片機的多路溫度巡回檢測儀設(shè)計。首先分析和制定了檢測系統(tǒng)的整體設(shè)計思想和方案，確保了該檢測系統(tǒng)具備真正的自動化檢測能力且結(jié)構(gòu)簡單。并用 MAX7219 驅(qū)動 LED顯示所測溫度及上下限。關(guān)鍵詞：溫度檢測 ；AT89C51；MAX7219 ；DS18B20 AbstractWith the development of puter technology and sensors, in production and daily IVactivities, people increasingly high temperature analog physical quantity measurement requirements. Industry, agriculture level of automation, rapid increase in microcontroller applications are increasingly being used, the role bee more and more significant. Temperature detection system is widely used in the production life of the people. Practical application of the temperature detection of this topic as a starting point, bined with the singlechip microprocessor technology, the design of microcontrollerbased multichannel Temperature Data Loggers.The graduation project content with the system measurement accuracy requirements, selection of the relevant control microprocessor。 the preparation of the testing procedures。 AT89C51。 DS18B20目錄1 緒論 ..................................................................................................................1V 設(shè)計概述 ................................................................................................................................................1 溫度檢測系統(tǒng)設(shè)計意義 ........................................................................................................................12 多路溫度巡回檢測儀設(shè)計內(nèi)容 ..........................................................................2 任務(wù)要求 ................................................................................................................................................2 系統(tǒng)設(shè)計應(yīng)用要求 ................................................................................................................................2 設(shè)計流程 ................................................................................................................................................23 設(shè)計方案 ............................................................................................................3 方案對比 .................................................................................................................................................3 溫度傳感器選擇方案 .....................................................................................................................3 單片機選擇方案 ............................................................................................................................3 顯示電路的選擇方案 ....................................................................................................................3 總體方案 ................................................................................................................................................44 系統(tǒng)設(shè)計 ............................................................................................................4 硬件設(shè)計 ................................................................................................................................................4 溫度傳感器設(shè)計 ............................................................................................................................4（1）DS18B20 介紹 ..................................................................................................................................4 單片機最小系統(tǒng) ............................................................................................................................8 顯示電路設(shè)計 ...............................................................................................................................10 按鍵電路 .......................................................................................................................................13 報警電路 ........................................................................................................................................14 軟件設(shè)計 ..............................................................................................................................................15 主程序 ............................................................................................................................................15 顯示子程序 ...................................................................................................................17 按鍵程序 ........................................................................................................................................18 程序編寫 ........................................................