【正文】 本 科 畢 業(yè) 論 文 （ 2020 屆） 題 目 單片機(jī)雙機(jī)通信酒精傳感器設(shè)計(jì) 學(xué) 院 理學(xué)院 專 業(yè) 光信息科學(xué)與技術(shù) 班 級(jí) 學(xué) 號(hào) 學(xué)生姓名 任課 教師 完成日期 2020年 05月 05日 本科畢業(yè)論文 摘要 本文設(shè)計(jì)的是一款基于 PIC16F877 單片機(jī)與 MQ3 酒精濃度傳感器的酒精濃度測(cè)量?jī)x?？梢詫?shí)現(xiàn) MQ3 將酒精濃度信號(hào)轉(zhuǎn)換成模擬電信號(hào)，然后通過(guò)單片機(jī)實(shí)現(xiàn)模擬電信號(hào)的識(shí)別采集和轉(zhuǎn)化為數(shù)字量再通過(guò) SPI 接口進(jìn)行雙機(jī)通信，并且在第二片單片機(jī)上通過(guò)數(shù)碼管顯示采數(shù)字量 。這樣就可以完成酒精濃度測(cè)試的基本任務(wù)了。 本設(shè)計(jì)最終目的是制作出實(shí)物，硬件部分使用 PIC16F877 單片機(jī)、 4 位一體數(shù)碼管、MQ3 氣敏酒精傳感器、焊接用電路板、導(dǎo)線、電容、電阻、晶振等器件。軟件編程語(yǔ)言將會(huì)使用 C 語(yǔ)言。在本設(shè)計(jì)中采用的 SPI 雙機(jī)通信技術(shù)，會(huì)使得制作出的成品功能更加的靈活同時(shí)也留下了拓展更多功能的空間。 關(guān)鍵詞： PIC 單片機(jī)；酒精傳感器； SPI 雙機(jī)通信； A/D 轉(zhuǎn)換；數(shù)碼管顯示 單片機(jī)課程設(shè)計(jì) ABSTRACT It is a design in this paper , based on PIC16F877 MCU and MQ3 alcohol concentration sensor alcohol concentration measuring instrument. It can convert alcohol concentration signals into analog signals , then achieved the identification of analog signals acquisition and convert to digital quantity by the SPI interface munication between two MCU, and on the second piece of MCU through digital tube display digital quantity . So we can plete the basic task of alcohol concentration test . The ultimate aim is to produce physical design , hardware part using PIC 16F877 MCU , four digital tube , MQ3 alcohol gas sensitive sensor , circuit board soldering , conductor , capacitor , resistor , resistor , crystal vibration device , etc . Software will use C programming language . In this design using the SPI munication technology between two MCU , Will make finished product function to produce more flexible at the same time, it left behind to expand more functions of space. Keywords: PIC MCU。 Alcohol sensor。 SPI munication between two MCU。 A/D conversion。 Digital tube display 單片機(jī)課程設(shè)計(jì) 目 錄 1．引言 .........................................................................................................................................1 單片機(jī)的發(fā)展及現(xiàn)狀 ........................................................................................................................1 單片機(jī)的引用范疇及發(fā)展趨勢(shì) ........................................................................................................2 單片 課題設(shè)計(jì)的任務(wù)和要求 ...........................................................................................................2 2 ． 酒精測(cè)試儀的背景知識(shí) ........................................................................................................4 酒精測(cè)試儀的種類 ........................................................................................................4 氣敏酒精傳感器介紹 ............................................................................................4 傳感器未來(lái)的發(fā)展方向 ................................................................................................5 傳感器的原理 ................................................................................................................7 氣敏傳感器的發(fā)展?fàn)顩r和技術(shù)水平 ............................................................................7 3 ．硬 件設(shè)計(jì) ................................................................................................................................8 總體設(shè)計(jì) ................................................................................................................................... .....8 單片機(jī)的最小系統(tǒng) .............................................................................................8 模塊 ...............................................................................................................9 雙機(jī)通信模塊 .............................................................................................12 顯示模塊 ...........................................................................................................15 單片機(jī)仿真以及電路 .............................................................................. ................15 4．軟件設(shè)計(jì) ............................................................................................................................ 17 總體方案 ......................................................................................................................17 程序流程圖 ..................................................................................................................17 軟件編程語(yǔ)言的選擇 ..................................................................................................17 匯編語(yǔ)言 ...........................................................................................................18 C 語(yǔ)言 ...........................................................................................................18 匯編語(yǔ)言與 C 語(yǔ)言的混合編程 ......................................................................19 主要模塊的程序設(shè)計(jì) ..................................................................................................19 雙機(jī)通信 C 程序設(shè)計(jì) ................................................................................20 5．軟件工具的介紹及使用 .....................................................................................................22 6．結(jié)論 .....................................................................................................................................24 致謝 ..............................................................