【正文】 tomobile Oil Amount Detector Abstract With the continuous development of society and economy， more and more vehicles have entered thousands of households and the cars has bee a lot of families39。同時當(dāng)油量值大于 45L時，電路自動聲光報警，提醒駕駛?cè)藖硖幚?。 本設(shè)計經(jīng)過硬件調(diào)試后，已經(jīng)實 現(xiàn)了本設(shè)計的所有要求。 本設(shè)計汽車油量檢測器以 protel和 proteus為開發(fā)工具，并且采用 C語言編程設(shè)計。傳統(tǒng)的油量檢測儀表依然是三刻度式的儀表，這種儀表油量的顯示是受油量傳感器的約束的，駕駛員只能定性的了解油量的多少，沒有精度可言。 畢 業(yè) 設(shè) 計 設(shè)計題目： 汽車油量檢測器的設(shè)計與實現(xiàn) 系 別： 信息工程系 班 級： 電子信息工程 姓 名： 指 導(dǎo) 教 師： 年 月 日 汽車油量檢測器的設(shè)計與實現(xiàn) 摘 要 隨著社會的不斷進步和經(jīng)濟的不斷發(fā)展，越來越多的汽車已經(jīng)進入了千家萬戶，汽 車已經(jīng)成為很多家庭的代步工具。燃油是汽車行駛的必要條件，人們在駕車出行時，油量的多少是必須要考慮的重要因素，所以時刻可以掌握油箱里油量的多少是每個司機的愿望。為了方便，必須開發(fā)出一種新型的汽車油量檢測系統(tǒng)，駕駛員可以通過這個檢測系統(tǒng)形象、直觀的看出汽車油箱內(nèi)剩余的油量，還可以在油箱剩余油量降低或者高達到一定值時發(fā)出聲光報警，以提醒駕駛員做出正確的處理措施。本設(shè)計以 STC89C52為核心器件，輔以壓力傳感器、 A\D轉(zhuǎn)換器、 LCD1602顯示電路、報警電路等組成，壓力傳感器的壓力采樣值的范圍只有 0~5mv，而 ADC0832只能識別伏級電壓，所以在壓力傳感器和 ADC0832之間必須接入一個信號放大器AD620AN，將電壓放大到 0~5v，然后通過傳感器壓力變化與電位差變化的對應(yīng)關(guān)系，將油量的剩余量轉(zhuǎn)換成電信號，經(jīng)過 A\D轉(zhuǎn)換器后，由單片機處理后的油量值通過 LCD電路顯示出來。當(dāng)壓力傳感器采集到壓力信號時，油量值可以通過 LCD液晶屏顯示出當(dāng)前的油量，并且隨著壓力的增大油量值依次顯示 0~50L。而當(dāng)存油量小于 10L時，電路聲光報警，提醒司機加油，以保護油泵，并于液晶顯示當(dāng)前油量的標(biāo)準(zhǔn)差。 walking fuel is a necessary condition for the automobile， so when people are driving the amount of the oil is a necessary factor。 The traditional instrument for oil measuring is still the instrument of three convenience， we must develop a new type of vehicle oil detection system， with which the drivers can know the oil reminded amagely and intutively。 The signal chip microputer STC89C52 is treated as the core device in the design of the automobile oil amount detector,which is consist of a pressure sensor、 a A\D converter、 a LCD display circuit and a alarm circuit。s change and the potential difference of the ,the electrical signals are handled with the A\D converter and the signal chip microputer finished,the data will show through the LCD circuit at a realtime. The design has achieved at all the the pressure sensor collects the pressure signal ,the oil value will show by the the increase of pressure,the oil value will show from 0 L to 50 the same time,w hen the oil is more than 45 L,the circuit will alarm with light and sound,so than it can remind the driver to and when the oil is less than 10 L,the circuit will remind the driver the same time, the amount of the oil39。 detection ； microputer 目 錄 1 引言 ................................................................................................................................ 1 2 系統(tǒng)簡介 ........................................................................................................................ 3 設(shè)計方案簡介 .......................................................................................................... 3 芯片的選擇及介紹 .................................................................................................. 3 壓力傳感器 ....................................................................................................... 3 單片機 STC89C52 ............................................................................................ 5 A/D 轉(zhuǎn)換器 ADC0832 ....................................................................................... 8 LCD1602 的介紹 ............................................................................................... 9 3 硬件設(shè)計 ...................................................................................................................... 13 單片機最小系統(tǒng)的設(shè)計 ........................................................................................ 13 復(fù)位電路的設(shè)計 ............................................................................................. 13 晶振電路的設(shè)計 ............................................................................................. 14 數(shù)據(jù)采集模塊的設(shè)計 ............................................................................................ 15 AD620AN 電壓放大電路的設(shè)計 ........................................................................... 16 A/D 轉(zhuǎn)換模塊的設(shè)計 ............................................................................................. 16 LCD 顯示電路的設(shè)計 ............................................................................................ 17 報警電路的設(shè)計 .................................................................................................... 17 硬件的焊接與調(diào)試 ................................................................................................ 18 硬件概述 ......................................................................................................... 18 硬件調(diào)試與焊接 ............................................................................................. 19 硬件調(diào)試結(jié)果及分析 ..................................................................................... 20 4 軟件設(shè)計 ..................................................................................................................... 22 PROTUES 軟件 .................................................................................................... 22 PROTUES 軟件介紹 ..................................................................................... 22 PROTUES 軟件開發(fā)流程 ............................................................................. 22 KEIL C51 軟件 ..................................................................................................... 22 KEIL C51 開發(fā)軟件介紹 ................................................................................. 22 KEIL 軟件開發(fā)流程 ........................................................................................ 23 系統(tǒng)軟件程序設(shè)計 ................................................................................................ 27 主程序設(shè)計流程圖 ......................................................................................... 27 ADC0832 采集數(shù)據(jù)子程序流程圖 ...........................................