《感应式自行车速度里程表设计毕业论文》.docVIP

河北经贸大学毕业论文感应式自行车速度里程表设计专业名称： 电子信息工程班 级： 电子11-2班学生姓名： 李姗姗指导教师： 崔智勇完成时间： 2015年5月摘 要 此次设计的感应式自行车速度里程表的核心是单片机和霍尔传感器。不同的车速会被霍尔传感器检测到并将其转变为不同频率的脉冲信号，进而输入到单片机进行计算再采用1602液晶屏和四位八段数码管分别进行显示，可以方便、简洁的将速度和里程呈现给使用者。本系统由单片机STC89C52、霍尔传感器、液晶显示屏1602、四位八段数码管、键盘矩阵、芯片393、38译码器组成。我们首先对感应式自行车里程表设计中所需要的硬件器件作了详细的介绍，而后又认真分析了硬件和软件部分的融合设计和功能实现，在此基础条件上对系统进行了仿真与调试 关键词 霍尔传感器；液晶显示1602；键盘矩阵；速度里程表Abstract Along with the increasing of peoples living standard, the application of bicycle is becoming more and more widely in our daily life, not only play the role of the transport now. The bicycle in todays social life has become a big sports fashion, accompanied by bike speed odometer, of course, also becomes our indispensable auxiliary tool in the process of movement. So the design of the bicycle speed odometer has practical significance, can well meet the requirements of people for cycling. The core of this design is single chip microcomputer and hall sensor. Hall-effect sensor detects the speed will be different and turned them into different frequency pulse signal, and then input to the single chip microcomputer to calculate, then use 1602 LCD screen and LED display, respectively, speed and mileage can be convenient and concisely presented to the user. This system consists of micro controller STC89C52, hall sensors, liquid crystal display 1602, LED, keyboard matrix,LM393, 38 decoder chip. The first thing we need in the design of induction bicycle speed odometer hardware device has made the detailed introduction, then carefully analyses the hardware and software design and function realization, part of the fusion system on the basic conditions for the simulation and debugging, finally carries on the physical operation.Keywords Hall Sensor;LCD1602;Keyboard Matrix;Speed odometer目 录 1 绪论 1 1.1 设计背景 1 1.2 设计的意义及前景 2 1.3 设计研究的主要内容 2 2 总体方案设计 3 2.1 系统功能分析及实现 3 2.2 硬件部分方案设计 3 2.3 软件部分方案设计 4 3 硬件电路设计 6 3.1 概述 6 3.2 数据采集模块 6 3.2.1 霍尔传感器工作原理及其介绍 6 3.2.2 LM393比较器 7 3.3 单片机模块