高速公路汽车追尾预警系统的研究

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1、天津大学硕士学位论文高速公路汽车追尾预警系统的研究姓名：秦国斌申请学位级别：硕士专业：电子与通信工程指导教师：沈保锁;吴桔生20071201ABSTRACTNowadayswiththedevelopmentoffreewayinourcountrythetrafficaceidentshavebeenincreasing．Freewayisone—wayroad．Thesurveyindicatesthatmostmalignantaccidentsarerear-endingcollisions．Atpres

2、enttheautomobileanti。collisiondevicesaremainlybasedonradartechnologywhichCannotbeusedingeneralbecauseofitsinstabilityandhighprice．Thispaperpresentedanewsystemforrear-endcollisionalarmbasedondigitalscaleandimageprocessing，whichhasbeenaccomplished．Theresearchis

3、dividedintotwopans：theestimationofthelongitudinalpositionofcarsandtheestimationofthe1ateralpositionofcars．Theprojectofdigitalscalesolvesthefirsttask．Adigitalscalecontainswirelesstransceiverandnucroprocessor,andisplacedbetweenevery100metersalongfreeway,justast

4、hecoordinatesalongfreeway．Thetransceiverplacedinthecarwilltransmitinformationtothenearestdigitalscaleforregister．ThisdigitalscalereceivestheinformationandjudgesthesafetygradeofthisCaraccordingtothere．gisterinformationofotherfrontalcarswhichisreceivedfromthetw

5、ofrontaldigitalscales．andfinallytransmitsthesafetygradeinformationtothetransceiverinthec牡BesidesthevehicleregisterinformationfromeverytendigitalscalesiscollectedandsenttoadatacontrolcenterSOthatthecenterCansuperviseallvehiclesonthefreeway．Themethodforlanedete

6、ctionisbasedonvisionsensorfixedonthecar．Thepaperpresentedtwoalgorithmsbyanalyzingthefeatureoftheimagesfromthecamera：thealgorithmbasedonDiscreteCosineTransforminfrequencydomain．Accordingtotheabovecontentofourresearchthethesisdemonstratedthedesignprincipleofour

7、project，analyzedtheproblemsinvolvedinOurdesign,anddesignedthehardwareandsoftwareofthesystem．Theexperimentalresultsatisfiesthepre—concertedrequirement．Keywords：rear-endcollisionalarm；digitalscale；lanedetection；discretecosl’netransfor独刨性声明本人声明所呈交的学位论文是本人在导师指导下进

8、行的研究工作和取得的研究成果，除了文中特别加以标注和致谢之处外，论文中不包含其他人已经发袭或撰写过的研究成果，也不包含为获得苤鲞叁鲎或其他教育机构的学位域证书面使焉过蘸耪糕。与我一同工作蕊翳恚对本磷究所徽的任耩贡献均已在论文中佟了翳确静说黉并表示了谢意。学位论文作者签名：李目诫签字日期：撕9年f月，7翻学位论文版权使用授权书本学位论文作者宪全了解叁盗盘堂有关保幽、使用学位