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1、无 锡 职 业 技 术 学 院毕 业 实 践 任 务 书课 题 名 称 基于单片机的自行车里程/速度表设计 指 导 教 师 徐 明 职 称 工程师 指 导 教 师 黄 从 贵 职 称 讲 师 专 业 名 称 电子工艺与管理 班 级 电子工艺20631 学 生 姓 名 宁 翠 萍 学 号 2031063121 课题需要完成的任务：设计一个自行车里程/速度表，以单片机AT89C51为核心，实现实时测量并显示自行车行驶过程中的两项运动参数：速度和里程。课题的具体要求如下：1、 总体方案的设计及论证。2、系统的根本结构及性能。3、硬件电路设计，包括：单片机系统电路、电源电路、测量电路、功能选择电路和显
2、示电路等。4、软件程序设计，包括：主程序设计、中断效劳子程序、显示控制子程序和采样子程序等。5、功能选择后启动测量，单片机实时采集，处理后显示。6、速度和里程值可单独显示，测量值误差小于1%。超速行驶设置限速参数时，能自动发出声光报警。7、毕业设计小结。课题方案：2.162.28 现场实地调研，查阅相关资料，完成文献综述；可行性方案分析。构思初步方案。3.1 3.7 论述并确定最正确设计方案；学习硬件开发软件、单片机开发软件。 3.8 4.10 设计硬件电路，编制软件程序，联机调试；撰写毕业论文。4.114.15 完善毕业论文，并做辩论准备。4.19 电子信息技术系 系部、分院 2021年12
3、月25日英文翻译“a cartoon technology and application1.IC card technical characteristic along with microelectronic technology unceasing development, specially 1m following memory chip manufacture craft breakthrough and mature, causes the entire IC card technology to present the more and more formidable vita
4、lity.Simple, the stable read-write performance Regarding the magcard, the linearity card, the light card, its information in the medium distribution is the plane. Therefore, when by read-write card in information, the card machine magnetic head and the light telegram heading all must the relative ca
5、rd carry on the reciprocal motion. Satisfies this transmission request the mechanism quite to be without doubt complex, 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 th
6、e magnetoelectricity transformation or the photo electricity transformation, transforms magnetism signal or the light signal the logical level signal. Therefore the signal transformation part further increased the card machine electricity part complexity. Regarding the IC card, its information card,
7、 its information storage is based on the semiconductor electric circuit. The information may understand three-dimensionally 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 complex mechanical drive s
8、tructure. 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 composition relative other cards plant is grea
9、tly 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. 1.2 data storage stable General magcard signal storage time is approximately 12 years, and needs to duplicate unceasingly renovates, maint
10、ains the data not to be able to decay. The card read-write 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 semi-conductor memory being able to guarantee the data the maintena
11、nce time above 10 years, even can achieve for 100 years long time. This enables the card in to escape the net 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 revolution
12、 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 tim
13、es to send the cost of capital greatly which the card brings.1.3 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 read-only, thus its application is restricted). However, present commodit
14、y 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 al
15、so will become 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 net 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. 1.4 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
