基于AT89C52单片机自动往返小汽车设计.doc

毕业设计（论文）题 目 自动往返小汽车英文题目 Automatic round-trip car 摘要本设计的控制系统采用AT89C52单片机；显示系统采用3个LED数码管显示里程数，4个LED数码管显示一次往返的时间；电机正反转采用桥式驱动控制，2档电压调速；里程记录采用霍尔传感器；跑道标志线采用光敏管检测并使用软件整形消抖措施；单片机、电机采用独立稳压电源供电。关键词自动往返小汽车；AT89C52; 传感器AbstractThe control system of with this design adopts embedded microcontroller unit such as AT89C52; Show system to adopt 3 show a mileage for the LED figures tube number, 4 time taken care of to show to go back and forth once for the LED figures; The electrical engineering is positive and negative to turn adoption bridge a type to drive a control, 2 file electric voltages adjust soon; The adoption n. hall sensor of the mileage record spreads a feeling machine; Runway scribe line adoption light the quick tube examination combine usage software orthopedics to eliminate to tremble measure; The single slices machine, electrical engineering adoptions independence is steady to press power supply power supply.Keywords Automatic round-trip car; AT89C52; sensors目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc139035333 摘要 PAGEREF _Toc139035333 \h I HYPERLINK \l _Toc139035334 关键词 PAGEREF _Toc139035334 \h I HYPERLINK \l _Toc139035335 Abstract PAGEREF _Toc139035335 \h I HYPERLINK \l _Toc139035336 Keywords PAGEREF _Toc139035336 \h I HYPERLINK \l _Toc139035337 绪论 PAGEREF _Toc139035337 \h 1 HYPERLINK \l _Toc139035338 1. 设计任务及方案介绍 PAGEREF _Toc139035338 \h 2 HYPERLINK \l _Toc139035339 1.1 设计任务 PAGEREF _Toc139035339 \h 2 HYPERLINK \l _Toc139035340 1.2 可行性方案的介绍 PAGEREF _Toc139035340 \h 3 HYPERLINK \l _Toc139035341 1.3 系统方案确定 PAGEREF _Toc139035341 \h 5 HYPERLINK \l _Toc139035342 2. 系统的硬件设计与实现 PAGEREF _Toc139035342 \h 6 HYPERLINK \l _Toc139035343 2.1 系统元器件的选择与介绍 PAGEREF _Toc139035343 \h 6 HYPERLINK \l _Toc139035344 2.1.1 AT89C52芯片 PAGEREF _Toc139035344 \h 6 HYPERLINK \l _Toc139035345 2.1.2 霍耳传感器（HD3020） PAGEREF _Toc139035345 \h 9 HYPERLINK \l _Toc139035346 2.1.3 施密特触发器（4093） PAGEREF _Toc139035346 \h 10 HYPERLINK \l _Toc139035347 2.1.4 LED显示器 PAGEREF _Toc13