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基于ds18b20溫度傳感器的顯示及報(bào)警系統(tǒng)設(shè)計(jì)(已修改)

2025-11-23 15:34 本頁(yè)面
 

【正文】 綜合課程設(shè)計(jì)報(bào)告 報(bào) 告 題 目 : 基于 DS18B20 溫度傳感器 的 溫度顯示及報(bào)警系統(tǒng) 作者所在系部: 機(jī)械工程系 作者所在專(zhuān)業(yè): 測(cè)控技術(shù)與儀器 作者所在班級(jí): B09122 作 者 姓 名 : 雷蘇力 作 者 學(xué) 號(hào) : 20204012216 指導(dǎo)教師姓名: 康會(huì)峰 、 趙 保 亞 完 成 時(shí) 間 : 2020 年 1 月 3 日 北華航天工業(yè)學(xué)院教務(wù)處制 — 1 — 基于 DS18B20溫度 傳感器的顯示及報(bào)警系統(tǒng) 摘 要 隨著現(xiàn)代信息技術(shù)的飛速發(fā)展和傳統(tǒng)工業(yè)改造的逐步實(shí)現(xiàn),能夠獨(dú)立工作的溫度檢測(cè)與 顯示系統(tǒng)應(yīng)用于諸多領(lǐng)域。傳統(tǒng)的溫度檢測(cè)以熱敏電阻為溫度敏感元件。熱敏電阻的成本低,需 要外 加 信號(hào)處理電路, 而且 可靠性相對(duì)較差,測(cè)溫準(zhǔn)確度低,檢測(cè)系統(tǒng)也有一定的誤差。與傳統(tǒng)的溫度計(jì)相比, 這次設(shè)計(jì)的是基于 DS18B20 的數(shù)字溫度計(jì),它 具有讀數(shù)方便,測(cè)溫范圍廣,測(cè)溫精確,數(shù)字顯示,適用范圍寬等特點(diǎn)。 在本設(shè)計(jì)中 選用 STC89C52 型單片機(jī)作為主控制器件, 采用 DS18B20 數(shù)字溫度傳感器作為測(cè)溫 元件, 通過(guò) 4 位共陽(yáng)極 LED 數(shù)碼 顯示 管 并行 傳送數(shù)據(jù),實(shí)現(xiàn)溫度顯示。 通過(guò)按鍵設(shè)置溫度上下限報(bào)警值,然后用不同顏色的 LED 燈報(bào)警。 本設(shè)計(jì)的內(nèi)容主要分為兩部分,一是對(duì)系統(tǒng)硬件部分的設(shè)計(jì),包括 串口下載電路、按鍵輸入電路、 溫 度采集電路和顯示電路;二是對(duì)系統(tǒng)軟件部分的設(shè)計(jì),應(yīng)用 C 語(yǔ)言實(shí)現(xiàn) 溫度上下限報(bào)警值的設(shè)定、 溫度的采集與顯示。 通過(guò) DS18B20 直接讀取被測(cè)溫度值, 送入單片機(jī) 進(jìn)行數(shù)據(jù) 處理 , 之后進(jìn)行輸出顯示, 最終完成該系統(tǒng) 的總體設(shè)計(jì)。其系統(tǒng)構(gòu)成簡(jiǎn)單,信號(hào)采集效果好,數(shù)據(jù)處理速度快,便于實(shí)際 監(jiān)測(cè) 使用。 關(guān)鍵詞 : 單片機(jī) STC89C52;溫度傳感器 DS18B20; LED 數(shù)碼管;數(shù)字溫度計(jì) — 2 — Abstract Along with the present information technology39。s swift development and traditional industry transformation39。s gradual realization, able to work independently of the temperature detection and display system used in many other fields. Traditional temperature examination takes thermistor as temperature sensitive unit. Thermistor39。s cost is low, needs the signal processing electric circuit, moreover the reliability is relatively bad, the temperature measurement accuracy is low, the examination system also has certain error. Compares with the traditional thermometer, what this design is based on the DS18B20 digital thermometer, it has the reading to be convenient, the temperature measurement scope is broad, the temperature measurement is precise, the digit demonstrated that applicable scope wide and so on characteristics. Used in the design STC89C52MCU as the main control device, digital temperature sensor DS18B20 as the temperature ponents of the anode through the four LED digital display tube parallel transmission of data, to achieve temperature display. This design39。s content mainly divides into two parts。 first, to system hardware part design, including temperature gathering electric circuit and display circuit。 Second, to the system software part39。s design, realizes temperature gathering and the demonstration using the C language. DS18B20 measured by direct reading temperature values and transfer Data into MCU and output to show his is the design of the Digital Thermometer. Its system constitution is simple, the effect of signal gathering is good, the speed of data processing is quick at al it is advantageous for the actual examination use. Keywords: MCU STC89S52。 DS18B20。 LED。 Digital Thermometer — 3 — 目 錄 第一章 緒論 .................................................................................................................................... 4 ........................................................................................................................ 4 ........................................................................................................................ 4 第二章 系統(tǒng)整體設(shè)計(jì) ...................................................................................................................... 5 2. 1系統(tǒng)設(shè)計(jì) 方案論證 ................................................................................................................... 5 第三章 系統(tǒng)的硬件選擇及設(shè)計(jì) ........................................................................................................ 6 ........................................................................................................................ 6 ................................................................................................................. 6 ............................................................................................................... 10 第四章 系統(tǒng)的軟件設(shè)計(jì) ................................................................................................................ 12 ........................................................................................................................................ 13 ............................................................................................................................. 13 控制源程序 ............................................................................................................................. 15 第五章 系統(tǒng)調(diào)試 ..........................................................................................................
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