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1、北京信息科技大学毕业设计（论文）题目：学院:专业：学生姓名：班级/学号指导老师/督导老师：起止时间：2012年月日至2012年月日摘要摘要随着社会的进步，电子类产品也得到了广泛的发展。尤其是单片机的发展异常迅速。由于单片机的特殊结构形式，在某些应用领域中，它承担了一些通用的微型计算机无法完成的工作，它是一种高性能，低价格的处理器。集成度高，体积小，可靠性又高，控制功能强，电压低。由于单片机具有这些特点，在人类的生活应用中十分广泛。本篇论文就是以AT89S52单片机为中心、附加A44E霍尔传感器测距，实现对出租车计价统计，采用AT24C0
2、2实现在系统掉电的时候保存单价和系统时间等信息，输出采用8段数码显示管。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，同时在不计价的时候还能作为时钟为司机同志提供方便。关键词：单片机AT89S52；AT24C02掉电存储；里程计算IIAbstractIIAbstractAbstractWiththeprogressofsociety,electronicproductshavealsobeenextensivedevelopment.Inparticular,thedevelopmentofSCMi
3、sveryrapidly.BecauseofthespecialstructureofSCM,insomeapplications,itincurredsomecommonmicro-computercannotcompletethework,itisahigh-performance,lowpricesofprocessors.Highintegration,smallsize,highreliability,strongcontrolfunction,lowvoltage.AsSCMwiththesecharacteristics,
4、thehumanlifeinverybroadapplication.ThispaperistoAT89S52SCMasthecenter,additionalA44EHallsensorlocation,andtheTaximeterstatistics,AT24C02usedinthesystemtoachievepower-downwhentheunitpricesandsavetime,andotherinformationsystems,theoutputofdigitaldisplaybyparagraph8Tube.The
5、circuitdesignofthemetercannotonlyachievethebasicpricing,butalsobasedontheday,night,waitingforthehalf-waytoregulatetheprice,whilenotpricingthetimeastheclockcanprovideconveniencefordrivers.Keywords:SCMAT89S52;AT24C02Power-downstorage;mileagecalculationII目录II目录目录摘要（中文）·····
6、·························································Ⅰ(英文)······························································Ⅱ第一章概述······························································11.1出租车计价器概述··················································11.2出租车计价器发展概况···
7、············································11.3系统主要功能·······················································2第二章出租车计价器硬件设计····································22.1系统的硬件构成及功能·················································22.2AT89S51单片机及其引脚说明·····························
8、··············32.3AT24C02引脚图及其引脚功能···········································52.4AT24C02掉电存储单元的设计······
