基于at89c52单片机的出租车计价器的设计_毕业设计论文.doc

基于AT89C52单片机的出租车计价器的设计 摘 要 随着城市改革开放的进一步深化，出租车行业迅速发展，出租车计价器的市场需求量也大大增加计价器出租汽车的经营者和乘坐出租汽车的消费者之间用于公平贸易结算的工具，计价器计价准确与否，直接关系到经营者和消费者的经济利益。因此怎样设计出一种既能准确计价又能方便司机的计价器尤为重要。 本课题是出租车计价器系统的设计。节约成本出发，以 单片机为中心、输出采用。本电路设计的计价器不但能实现基本的计价，而且还能根据白天、黑夜、中途等待来调节单价，里程、单价、总车价相关信息显示DS1302，AT24c02，LCD1602 Based on AT89C51 taxi meter design Abstract With the further deepening of reform and opening up of the city, the taxi industry rapid development, the taximeter market demand also increased significantly, as an important part of the taxi meter, the meters popularity is bound to the trend of the times, it is expected that the future meter the market is promising. At the same time the meter as taxi operators and taxi consumer tools for fair trade settlement, the accuracy of the meter denominated, directly related to the economic interests of operators and consumers. Therefore, how to design a both accurate pricing but also convenient for the drivers meter is particularly important. The issue is the design of the taxi meter system. Taxi meter practicality and cost savings as the starting point, AT89C52 microcontroller as pulse count on the mileage and the total amount of statistics, interactive interface output LCD1602 LCD. Independent button reset, clear, day and night control mode selection function, the meter circuit design not only to achieve the basic pricing, but also according to the day and night, half-way wait to adjust the unit price, mileage, price, gross vehicle price-related information. Keywords: single-chip,LCD1602, Taximeter ,Hall sensor,AT24C02 目 录 摘 要 I 关键词 I Abstract II Keywords II 第一章 绪论 1 1.1 选题的目的和意义 1 1.2出租车计价器的发展史 1 1.3 国内的一些研究成果 2 第二章 出租车计价器的方案论证 3 2.1 出租车计价器的功能要求 3 2.1.1出租车计价器的基本功能 3 2.1.2 出租车计价器的主要功能 3 2.2 方案论证 4 2.3 系统工作原理 5 第三章 出租车计价器的硬件设计 6 3.1 单片机的介绍 6 3.2 单片机最小系统 7 3.2.1 电源供电模块 8 3.2.2 复位电路 8 3.2.3 晶振电路 8 3.3 掉电存储模块的设计 9 3.4 时钟电路模块设计 9 3.5 路程测量电路模块设计 10 3.5.1 霍尔传感器简介 10 3.5.2 里程计算计价单元的设计 10 3.6 显示电路的设计 11 3.6.1