【正文】 無 錫 職 業(yè) 技 術(shù) 學(xué) 院 畢業(yè)設(shè)計任務(wù)書 1 無 錫 職 業(yè) 技 術(shù) 學(xué) 院 畢 業(yè) 實 踐 任 務(wù) 書 課 題 名 稱 基于單片機的自行車?yán)锍?/速度表設(shè)計 指 導(dǎo) 教 師 徐 明 職 稱 工程師 指 導(dǎo) 教 師 黃 從 貴 職 稱 講 師 專 業(yè) 名 稱 電子工藝與管理 班 級 電子工藝 20631 學(xué) 生 姓 名 寧 翠 萍 學(xué) 號 2031063121 課題需要完成的任務(wù)： 設(shè)計一個自行車?yán)锍?/速度表，以單片機 AT89C51 為核心，實現(xiàn)實時測量并顯示自行車行駛過程中的兩項運動參數(shù)：速度和里程。課題的具體要求如下： 總體方案的設(shè)計及論證。 系統(tǒng)的基本結(jié)構(gòu)及性能。 硬件電路設(shè)計，包括：單片機系統(tǒng)電路、電源電路、測量電路、功能選擇電路和顯示電路等。 軟件程序設(shè)計，包括： 主程序設(shè)計、中斷服務(wù)子程序、顯示控制子程序和采樣子程序等。 功能選擇后啟動測量，單片機實時采集， 處理后顯示。 速度和里程值可單獨顯示，測量值誤差小于 1%。超速行駛（設(shè)置限速參數(shù)）時，能自動發(fā)出聲光報警。 畢業(yè)設(shè)計小結(jié)。 課題計劃： ～ 現(xiàn)場實地調(diào)研，查閱相關(guān)資料，完成文獻(xiàn)綜述； 可行性方案分析。構(gòu)思初步方案。 ～ 論述并確定最佳設(shè)計方案； 學(xué)習(xí)硬件開發(fā)軟件、單片機開發(fā)軟件。 ～ 設(shè)計硬件電路，編制軟件程序，聯(lián)機調(diào)試； 撰寫畢業(yè)論文。 ～ 完善畢業(yè)論文，并做答辯準(zhǔn)備。 計劃答辯時間： ～ 電子信息技術(shù)系 系（部、分院） 2020 年 12 月 25 日 無 錫 職 業(yè) 技 術(shù) 學(xué) 院 畢業(yè)設(shè)計說明書（英文翻譯） 2 英文翻譯 “ a cartoon technology and application card technical characteristic along with microelectronic technology unceasing development, specially 1μm following mem ory chip manufacture craft breakthrough and mature, causes the entire IC card technology to present the more and more formidable vitality. , the stable readwrite performance Regarding the magcard, the linearity card, the light card, its information in the medium distribution is the plane. Therefore, when by readwrite card in information, the card machine magic head and the light telegram heading all must the relative card carry on the reciprocal motion. Satisfies this transmission request the mechanism quite to be without doubt plex, thus increased the card machine failure rate greatly. Moreover, because the magcard, the linearity card or the light card carry on the data access directly, but is needs through the magoelectricity transformation or the photo electricity transformation, transforms magism signal or the light signal the logical level signal. Therefore the signal transformation part further increased the card machine electricity part plexity. Regarding the IC card, its information card, its information storage is based on the semiconductor electric circuit. The information may understand threedimensionally for in the medium distribution. In the use the card machine and the card direct contact, and maintains both relatively static, thus does not need the plex mechanical drive structure. On the other hand the IC card and between the card machine carries on the logical level wigwag directly, does not need the clear signal type transformation. This causes the card machine which the card machine mechanism and the electric circuit position relative other cards plant is greatly the simplification, this directly will cause the machine cost to drop, the maintenance cost will reduce, the machines and tools use will be stabled reliably. data storage stable General magcard signal storage time is approximately 1~2 years, and needs to duplicate unceasingly renovates, maintains the data not to be able to decay. The card readwrite number of times also is restricted in several thousand next best, more uses will not be able to guarantee the data the stability and the reliability. Uses in the IC card the semiconductor memory being able to guarantee the data the maintenance time above 10 years, even can achieve for 100 years long time. This enables the card in to escape the in the situation to use, also can guarantee the data the authenticity and the reliability. Simultaneously also reduced the worry data possibly to change or the loss carries on the 無 錫 職 業(yè) 技 術(shù) 學(xué) 院 畢業(yè)設(shè)計說明書（英文翻譯） 3 revolution and the backup work. On the other hand, the IC card memory cell may duplicate scratches reads in the number of times to reach generally 10,000 times, even reaches above 100,000 times. Not only this directly increased the card repetition use ability, moreover reduces likely the magcard such many times to send the cost of capital greatly which the card brings. large capacity data storage ability Magcard data ability are generally most only then more than 300 (light card although reserves may be very big, but because is readonly, thus its application is restricted). However, present modity IC card storage capacity: The memory stick, may reach the 4M position, the logical encryption card, may reach the 16M position, but regarding brings the CPU smart card, the storage capacity to reach the 64K byte, also may affirm, along with the Semiconductor Technology development, its capacity also will bee the position growth every year. Not only this enables the IC card to apply in the memory picture, the fingerprint, the sound wave, regards the grain and so on some need large capacity information in the biology trick recognition project, but also was card multipurpose has provided the bigger capable of extension. Many kinds of encryption technology measure in the magcard, the bar code card or the light card information needs to carry on certain transformation to be able to distinguish, but they fe and the malicious interpolation attack lack the enough resistance energy actually facing the duplication. Regarding the IC card, may use many kinds of encryption technology measure: (1) hardware logic encryption way: Namely uses the semiconductor password which cannot be read to save, enables the password parison operation only in the chip interior to plete voluntarily. (2) mon software logic encryption way: Namely uses the characteristic character mix code either uses Canada to examine the glyphomancy verification with clearly marked price processing or uses the scrambled text code directly, all may quite conveni