自行车里程表设计毕业论文.doc

（　2011 届） 毕业设计 题 目： 　 自行车里程表设计 姓　　名：　　 　　　 　　　　　　　　　 专　　业：　　 电子信息工程 　　　 班　　级：　　　　自行车里程表的设计 摘 要 在自行车行驶的过程当中，自行车里程表是为使用者及时的提供动态驾驶信息的重要仪表，它的性能好坏直接的影响了交通和人身安全。传统机械式里程表由于受装置元件的影响，使得在车辆高速行驶的时候，造成里程表指示的不稳定，反映迟钝甚至失效。使车辆使用者不能及时的准确的收集到车辆的实时信息，从而无法掌握车辆的行驶状态，容易造成交通事故和威胁到人身安全。在电动自行车越来越多的同时，避免因车速原因而所造成事故的需要性越来越迫切，所以对里程表进行更有效的设计是很重要的。 本设计所介绍的自行车里程表是基于AT89C52单片机和霍尔传感器的车速和里程测量系统。同时，本设计还采用了4位数码管显示模块以及按键切换显示模块；运用Keil C51 编程软件工具进行软件部分的设计。 本文介绍的速度与里程表设计以单片机和霍尔传感器为核心，传感器将不同车速转变成的不同频率的脉冲信号输入到单片机进行控制与计算再采用LED 模块进行显示使得电动自行车的速度与里程数据能直观的显示给使用者。 关键词：单片机,霍尔传感器，数码管显示，里程表 The Design of Bicycle Odometer Abstract In the process of moving bicycles, bicycle odometer is for users to provide timely information on important dynamic driving instrument, its performance has a direct impact on traffic and personal safety. Traditional mechanical odometer due to the impact of flexible shaft makes high-speed driving, causing instability odometer directions, reflecting the slow or even fail. The vehicle user can not be timely and accurate real-time information collected from vehicles, which can not grasp the state of the vehicle, could easily lead to accidents and threats to personal safety. At the same time more and more electric bicycle, to avoid accidents caused by speed because of more pressing needs, so the odometer for more effective design is very important. The design presented is based on AT89C52 microcontroller bicycle odometer and Hall sensor speed and mileage measurement system. At the same time, this design also features four digital display and key switch module display module; using Keil C51 programming software tools software part of the design. This article first introduces the odometer that speed the development of the trends and the future status; Secondly, introduced the outstanding advantages of this design; then the work requirements under the odometer choose the right of the sensor, microcontroller Deng components; Tong S