第PAGE\*MERGEFORMAT1页共PAGE\*MERGEFORMAT1PAGE\*MERGEFORMAT1页出租车计价器微机系统设计摘要：随着社会进步，出租车已经越来越贴近生活，成为我们重要的交通工具，影响着我们现在的生活，出租文化已成为一种显著的文化，成为社会生活的组成部分。出租车计费系统，关系司机和乘客的切身利益，也是问题纠纷的焦点。本设计通过运用单片机设计的出租车计价器，简单易懂，是学习电子课程的一个综合性实验，有助于提高分析问题能力。本电路以AT89S51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AT24C02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：传感器，AT89S51，中断，单片机，定时器/计数器ComputersystemsdesignTaximeterABSTRACT：Departmentstrengthensthemanagementinrecentyearsofsixkindofkeymeasurementappliancesalongwiththesocialprogress,therentalcaralreadymoreandmoredrewclosetothelife,becameourimportanttransportationvehicle,affectsourpresent'slife,thehiringculturehasbeenbecomingoneremarkableculture,becamethesociallifetheconstituent.Therentalcarcostsystem,relatesthedriverandpassenger'svitalinterest,isalsothequestiondispute'sfocalpoint.Thisdesignthroughutilizationmonolithicintegratedcircuitdesignrentalcarmileagefaremeter,simpleeasytounderstand,isstudiestheelectroniccurriculumacomprehensiveexperiment,ishelpfulintheenhancementanalysisquestionability.Thecircuitwith89S51Single-ChipMicrocomputerasthecenter,additionalA44EHallsensorlocation,andtheTaximeterstatistics,AT24C02usedinthesystemtoachievepower-downwhentheunitpricesandsavetime,andotherinformationsystems,digitaloutputbyparagraph8oftheshow.Thecircuitdesignofthemetercannotonlyachievethebasicpricing,butalsobasedontheday,night,waitingforthehalf-waytoregulatetheprice,whilenotpricingthetimeastheclockcanprovideconveniencefordriverscomrades.Keyword:Sensor，AT89S51，Interrupt，Single-ChipMicrocomputer，Timer/count第PAGE\*MERGEFORMATII页共II页目录TOC\o"1-3"\h\uHYPERLINK\l"_Toc295773970"1绪论1HYPERLINK\l"_Toc295773971"1.1概述1HYPERLINK\l"_Toc295773972"1.2出租车计价器的发展1HYPERLINK\l"_Toc295773973"1.3方案设计2HYPERLINK\l"_Toc295773974"1.4系统原理3HYPERLINK\l"_Toc295773975"2电路的功能单元设计PAGEREF_Toc295773975\h5HYPERLINK\l"_Toc295773976"2.1AT89S51简介PAGEREF_Toc295773976\h5HYPER