基于单片机控制的双模式儿童防走失系统设计

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《》2012316,20。,,,。、,,,。。GPS,。:(1):,,;1000m,;(2):,;Google,;(3)Android,。,,。:,,,。1。,,,;,:,,。1。:(1):,,(,450000):,、。GPS,,,。:;GPS;;:TN710:B:1674-7720(2012)06-0086-04Designofdouble-modeforpreventionofchildrenbeinglostbasedonthecontrolofsinglechipmicrocomputerWeiXiaolong,RenTianping,ChenWei(ZhengzhouUnivervity,Zhengzhou450000,China)Abstract:Sincethelimitationoftraditionalpreventionforchildrenbeinglostsystem,thepaperintroducesanewsystemusedtopreventthechildren'gettinglostbasedonthecontrolofsingalchipmicrocomputer.Thenewsystemcanconveydatabothunderwirelesssignalandmobilesignal.Gettingthepositioninformationofchildrenexactlybyanalyseandusetheglobalpositionsystem,andsendthedatatothedeviceusedbytheirparentsbysometransmissionmode,thenitcandealwiththedataandshowtheex-actlypositionorrelativeposition.Keywords:singlechipmicrocomputer;GPS;dataconveying;figureshowingExampleofApplication86《》2012316,(Google);(2):;(3):,,,。22.1GPSGPS(GlobalPositioningSystem),[1]。,:。GPS。GoogleAndroid,API,API,GPS,。、。,,:LocationManagerlocationManager=(LocationManager)get-SystemService(context);Locationlocation=locationManager.getLastKnownLocation(provider);updateWithNewLocation(location);LocationManagerlocationManager=(LocationManager)getSystemService(context)Loca-tionManager,,;Locationloca-tion=locationManager.getLastKnownLocation(provider)locationManagerGPS,location;updateWithNewLocation(location)GPS,。GPS。GPS,、,、、GPS(GPS),。GPSGPSGPS,TTL,I/O。GPSVCCGND,GPS;GPS4041,RXD0、TXD0,GPS,TTL。GPS,。:,,Y,X。,,,。,,。,,。:α=(α1+α2)/2OA=R×cos(α)AC=OA×(β1-β2)BC=R×(α1-α2)juli=AC2+BC2姨jiaodu=arctan(BC/AC),α1、α2、β1β2,α,OA、R,AC、BC。2.2,GSM。,,SIM300CGPRSAPC240。,,,SIM300C,,ExampleofApplication87《》2012316。:SmsManagersmsManager=SmsManager.getDefault();smsManager.sendTextMessage(mobile,null,content,null,null);SmsManagersmsManager=SmsManager.getDefault()SmsManager,;smsManager.sendTextMessage(mobile,null,content,null,null)SmsManager,,。GSM2。,SIM300CSIM。,。,GPS,I/O,。3(,)。,、GSMGPS,AT-MEGA64,RXD1TXD1,EN_AEN_BGSM。2.3,。Android。Android,、,API。AndroidLinux。API,,[2]。,GSM。GPSGPS,GPSGPS,Google。:(1);(2);(3);(4)。,,、、。,,;,;,,,Google,Google,。,4。,,Google。,,,,;Google,.MapView,Google,,,,。,:,,Google,;Google,ExampleofApplication88《》2012316(82),。[1].[M].:,2007.[2],.[M].:,1999.[3],,.[M].:,2006.(:2011-11-18):,,1981,,:。(85)[4]Cinterion.MC52ihardwareinterfacedescription[J/OL].[2008-8-19].[5]Cinterion.MC52iATcommandset[A](2008-8-19).http://[6],,.GPSGPRS[J].,2010,38(6):150-153.(:2011-11-29):,,1987,,:,。,,1960,,:。,,1982,,:、。。3GPS,GPS:(1):0~1.5m;(2):1~5m;(3):0~30m;(4):0~30m;(5):0~10m;(6):0~1m。GPS28m。,,,1。,,2。2,,8.5m,28m,,8.5m,GPS。,,。,GPS、,。,;GPS,,,8m;,,,。[1].GPS[M].:,2010.[2]MEIERR.Android[M].:,2010.(:2011-11-17):,,1988,,:。,,1970,,,:。,,1987,,:。2maxmax———minminmaxmin———minmax/m8.50988.3277/m7.47.41113.533255113.53318934.81143334.811383113.533235113.53318234.81141834.811369ExampleofApplication!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!89

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