文档介绍：学号: 20076833 毕业设计(论文) 题目: 自行车里程表的设计作者谢思远届别 2011 系别电气工程系专业自动化指导老师职称讲师完成时间 ~ 摘要本文文介绍的速度与里程表设计以 STC89C52 单片机系统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LCD液晶显示模块进行显示,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。本系统由霍尔传感器、单片机 ST8C9C52RC 、LCD1602 液晶显示模块、数据存储电路和键盘控制组成。通过单片机的设置可对霍尔传感器输入的脉冲信号进行计数和处理,这样能精确地算出加到引脚的单位时间内检测到的脉冲数;设计里程和速度显示采用 LCD模块,里程数通过 EEPROM 来存储。本文先对里程表设计当中所需设备作了详细介绍,对设计中存在的问题进行了说明;而后对硬件和软件部分的设计和实现作了认真的分析;然后给出了系统的建模过程及相应的系统模型,在此基础上进行了控制仿真,并对仿真效果进行了比较。本里程表的设计具有结构简单,成本低廉,显示清晰,稳定可靠等优点。并且可进行扩充,加入时速表的功能,更加方便的了解你现在所处的情况。关键词:STC89 单片机 LCD1602 液晶显示霍尔传感器 EEPROM 存储器 Abstract This paper introduces the speed and "milestones" designed to STC89C52 single-chip puter system and hall sensor as the core. Sensors will different speeds into a different frequency pulse signal input to the single-chip puter control, and then using calculation and LCD module that makes electric bicycle speed and mileage data can be intuitive display for the users. The system posed of hall sensors, SCM ST8C9C52RC, LCD1602 LCD module, data storage circuit and the keyboard ponent. Through the MCU set to hall sensor-based input pulse signal processing, count and that can accurately calculate added to the pins per unit time the number of pulses detected; Design mileage and speed by LCD module, mileage display E2PROM to store by. This paper first needed to "milestones" design of equipment in detail, on the problems existing in the design, explained And then to hardware and software design and implementation of the part made earnest analysis; Then presented system modeling process and the corresponding system based on this model, the control simulation, and the simulation results pared. This "milestones" design has simple structure, low cost, showed clear, stable and reliable. And can undertake extend, join a speedometer function, more convenient to understand the situation that you are in now. Key words : STC89 SCM LCD1602 Hall sensor EEPROM memory 目录第1章绪论..............................................