【正文】 組成眾多的測量電路用于速度、溫度、深度、高度、濕度、光強(qiáng)等方面的測量和研究等特點(diǎn)，在我國現(xiàn)代化生活、生產(chǎn)中已經(jīng)得到了廣泛的應(yīng)用，如在工業(yè)檢測控制、儀器儀表、電子工業(yè)、機(jī)電一體化等眾多領(lǐng)域取得了令人矚目的成果?，F(xiàn)在出租車是城市交通的重要組成部分，行業(yè)健康和發(fā)展也獲得越來越多的關(guān)注。出租車行業(yè)在我國是八十年代初興起的一項(xiàng)新興行業(yè)，隨著我國國民經(jīng)濟(jì)的高速發(fā)展，出租汽車已成為城市公共交通的重要組成部分。出租汽車服務(wù)行業(yè)和出租汽車計(jì)價(jià)器緊密相關(guān)，因?yàn)槌鲎馄嚤仨毎惭b出租汽車計(jì)價(jià)器才能投入營運(yùn)。關(guān)鍵詞：里程，霍爾元件，LCD 顯示，時(shí)距并計(jì)畢業(yè)設(shè)計(jì)（論文）IAbstractIt is the major cities in the taxi industry has universal automatic meter now，and meter technology development is a foregone conclusion. And some small cities not yet universal, but with increasing speed up urban construction, a symbol of taxi industry will also accelerate development, and the popularity meter is no doubt, therefore, the future of the automobile market valuation is still potential. By STC89C54 as kernel, electric motor imitating wheel revolving, using A04E Hall element to measure revolution, the measure and statistic are achieved. In this article, the hardware circuit and software design of taximeter are introduced in detail. About the hardware, the pulse number is transmitted of one cycle of the electric motor into Single Chip Microputer system. Then the signal processed by Single Chip Microputer system is sent to display scream. About the software, in C language, the program is designed in the mode of modules. The system has realized the taxi mileage waiting time and total price of time and mileage counting together can be displayed on LCD.Keywords: Mileage,Hall element,LCD,Time and mileage counting together 畢業(yè)設(shè)計(jì)（論文）II目 錄第一章 緒論 ..........................................................................................................................1 課題背景 ......................................................................................................................1 課題的主要任務(wù)及內(nèi)容 ..............................................................................................2第二章 出租車計(jì)價(jià)器系統(tǒng)總體方案設(shè)計(jì) ..........................................................................4 任務(wù)分析與實(shí)現(xiàn) ..........................................................................................................4 出租車計(jì)價(jià)器系統(tǒng)硬件方案設(shè)計(jì) ..............................................................................4 里程測量傳感器的設(shè)計(jì) .......................................................................................5 方案的確定 ...........................................................................................................7 出租車計(jì)價(jià)器系統(tǒng)軟件方案設(shè)計(jì) ..............................................................................7第三章 出租車計(jì)價(jià)器系統(tǒng)硬件電路設(shè)計(jì) ..........................................................................9 概述 ..............................................................................................................................9 傳感器及其測量系統(tǒng) ..................................................................................................9 霍爾傳感器的測量原理 .....................................................................................10 集成開關(guān)型霍爾傳感器 .....................................................................................11 單片機(jī)的原理及應(yīng)用 ................................................................................................12 單片機(jī)原理簡介 .................................................................................................12 單片機(jī)的引腳功能介紹 .....................................................................................13 單片機(jī)中斷系統(tǒng)介紹 .........................................................................................16 單片機(jī)定時(shí)/計(jì)數(shù)功能介紹 ................................................................................18 單片機(jī)外圍電路的設(shè)計(jì) ............................................................................................19 時(shí)鐘電路的設(shè)計(jì) .................................................................................................19 復(fù)位電路的設(shè)計(jì) .................................................................................................20 顯示電路的設(shè)計(jì) .................................................................................................22第四章 出租車計(jì)價(jià)器系統(tǒng)軟件程序設(shè)計(jì) ........................................................................25 概述 ............................................................................................................................25 出租車計(jì)價(jià)器系統(tǒng)總體程序設(shè)計(jì) ............................................................................25 中斷子程序的設(shè)計(jì) ....................................................................................................26 數(shù)據(jù)處理子程序的設(shè)計(jì) ............................................................................................27第五章 系統(tǒng)調(diào)試與分析 ....................................................................................................29 硬件電路的搭建 ........................................................................................................29 調(diào)試故障及原因分析 ................................................................................................29 調(diào)試結(jié)果 ....................................................................................................................29 候時(shí)顯示 .............................................................................................................29 里程顯示 .............................................................................................................30 停車總價(jià)顯示 .....................................................................................................31第六章 社會經(jīng)濟(jì)效益分析 ................................................................................................32結(jié)束語 ..................................................................................................................................33畢業(yè)設(shè)計(jì)（論文）III致 謝 ....................................................................................................................................34參考文獻(xiàn) ..............................................................................................................................35附錄Ⅰ 出租車計(jì)價(jià)器系統(tǒng)硬件系統(tǒng)原理圖 ....................................................................37