基于单片机的里程表设计1.doc

课 程 设 计 说 明 书 本文介绍里程表设计以单片机和传感器为核心。传感器将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，使得电动自行车的里程数据能直观的Abstract: this paper introduces milestones designed to SCM and hall sensor as the core. Hall sensor-based the upcoming low-level pulse signal input to the single-chip microcomputer control and calculation, again using LED module that makes electric bicycle mileage data can be intuitive display for the users. Bike milestones is used for long-distance bike driving distance of continuous measurement meter. It is divided into power, hall sensors and display part 3. At present, milestones widespread use in the car and the car, joggling is a mechanical measuring devices, testing precision of bicycle is relatively low, the use of milestones a rare occurrence. In view of this situation, development of a new digital milestones used to bicycle is very necessary. This paper introduces bike milestones is by power supply voltage, AT89C52 single chip computer system for central processor, combining precision control circuit, convenient way to realize the intellectualized, high precision, high reliability, high efficiency, and the design of milestones bicycle usage is convenient. Keywords: microcontroller measure-control system bike timers 目录 1 设计要求………………………………………………………………4 1.1基本要求………………………………………………4 1.2 发挥部分………………………………………………4 2 方案讨论………………………………………………………………4 2.1 速度的测量………………………………………………4 2.2 传感器的选择……………………………………………4 2.3 单片机的徐泽……………………………………………5 2.4 显示器选择………………………………………………5 3 功能描述………………………………………………………………6 4 结构框图………………………………………………………………6 5 电路图…………………………………………………………………7 6 元器件简介……………………………………………………………7 6.1 AT89S52单片机简介……………………………………7 6.2 LED数码管显示器………………………………………7 6.3 霍尔开关型传感器………………………………………8 7 系统流程图…………………………………………………………9 8 调试过程简述………………………………………………………9 9 程序编写步骤………………………………………………………10 10 参考文献…………………………………………………………12 11 附录1………………………………………………………………14 12 附录 2……………………………………………………………25 一 设计要求 以单片机为核心器件设计一个自行车行车码表。以实际自行车为背景，码表精度尽可能高、体积尽可能小，成本尽可能低，功耗尽可能低、功能尽可能丰富。 1.基本要求： （1）； 测量自行车车轮转过一圈的时间t，则速度。 2