资源描述：
《基于at89c51单片机倒车防撞报警系统设计毕业论文》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、基于单片机倒车防撞雷达的设计研究摘要随着我国经济飞速发展，越来越多的人拥有了自己的汽车，同时由泊车和倒车所引发的事故也越来越多。这些事故常常给驾驶员带来许多麻烦，因此，有助于驾驶员泊车和倒车的倒车雷达应运而生。倒车雷达，是汽车泊车安全辅助装置，能以声音或者更为直观的显示告知驾驶员周围障碍物的情况。本文介绍了一种利用超声波测距原理研究的高性价比倒车雷达，它可以提醒驾驶员进入警戒区域，同时进行三级声光报警。无须占用司机的视觉资源，使司机可以把全部注意力用于观察车前及车旁的路况。超声发射部分由89C51单片机产生40k
2、Hz的信号，通过CD4069驱动发射探头；系统接收部分由接收探头拾取反射回来的微弱信号，当接收电路接收到反射信号就中断89C51计数器停止计数，从而得到超声波从发射到接收信号的时间差。关键词：倒车雷达、超声波、单片机毕业设计说明书（论文）中文摘要Basedonmonolithicintegratedcircuitback-draftanticollisionradardesignresearch修改对应的英文文摘AbstractAlongwithourcountryeconomyrapiddevelopment,
3、moreandmoremanypeoplehadownautomobile,simultaneouslybyparkstheaccidentwhichinitiateswiththeback-draftmoreandmoretobealsomany.Theseaccidentsfrequentlybringmanytroublestothepilot,therefore,ishelpfulinthepilotparkswiththeback-draftback-draftradararisesatthehisto
4、ricmoment.Theback-draftradar,istheautomobileparksthesafeauxiliaryunit,canoramoredirect-viewingdemonstrationinformsaroundthepilotbythesoundtheobstaclesituation,thepuzzlewhichrelievedthepilottohaveparkedwithstartvehicleswhenallaroundvisitscauses,andhelpedthepil
5、ottocleanthefieldofvisiondeadangleandthelineofsightfuzzyflaw.Thisarticleintroducedonekindofuseultrasonicrangingprincipleresearchthehighperformance-to-priceratioback-draftradar,itmayremindthepilottoenterthezoneofsecurity,simultaneouslycarriesonthreelevelsofaco
6、usto-毕业设计说明书(论文)外文摘要opticstoreporttothepolice.Doesnotneedtotakedriver'svisualresources,enablesthedrivertobepossibletouseinthecompleteattentionobservinginfrontofnearbythevehicleandthevehiclestateofroads.Thesupersoniclaunchpartproducesthe40kHzsignalbythe89C51mo
7、nolithicintegratedcircuit,ThroughCD4069actuationlaunchprobehead;Thesystemreceiveparttheweaksignalwhichreflectsbythereceiveprobeheadcollection,Whentheacceptingcircuitreceivesthereflectionsignaltointerruptthe89C51counterstopcounting,thusobtainstheultrasonicwave
8、fromtolaunchtothereceivesignaltimedifference.Keywords:Reversingradar,Ultrasonic,SCM目录1引言11.1倒车雷达研究的背景及意义11.2国内外倒车雷达的发展现状21.3雷达的发展22超声波倒车雷达的工作原理32.1超声波32.2超声波发生器42.3超声波测距原理42.4超声波测距误差分析62.
