| With the rapid development of vehicle industry at home and abroad, lives of people is becoming convenient increasingly.but at the same time,the safty of vehicle also give people to put forward a difficult problem--qutomobile guard against theft. At present,various auto security methods and products emerge in endlessly,however,the problem of anti-theft of auto has not solved completely.the main defects of traditional alarm system are:passive guard against theft,the stolen auto could not be tracked and can not do the remote fortification removal and so on.This system design of GSM cardalarm,is relying on coverage extremely high GSM public network,using GSM wireless communications business and short message increment operation,adopting people and the car interactive initiative anti-theft mode,we can do the remote pulled motors and the orientation,survellance on-site voice,sent alarm information,theft alarm,vibration alarm function,which make owner off to see or hear of passive anti-theft embarrasing situation,broke through the distance limit,the system is with high technical content,intelligence and networking features.GSM(Global System for Mobile Communication)!s based on the tdma technology of mobile communication system,and is currently developing more mature,perfecting and most widely used of communication system.At present,GSM digital cellular mobile networks,mainly including China Mobile and China Unicom two big operators,which has already been built nationwide,is the main way of public mobile networks,mainly provide voice,short message,data and so on many kind of business.Among them,which are based on GSMSMS(Short Message System)function,can develop the transmission various testing,monitoring data signals and controlling command of data communication system.Because GSM network realized networking and roaming in the global scope,do not need a special communication network,can easily complete remote data communication,at the same time,has good real-time.The primary function of the system is:it adopts the GSM communication channel,when the vehicle unattended,lauching vehicle displacement sensor while the car was stolen,using mobile phone after the message function,alarm send SMS to the driver’s mobile phone,after the driver is confirmed,control cars.Auto control device consists of a microcomputer.In the system,when the driver’s car is grabbed by pilfer,drivers can be far away from thieves and robbers,in the safe locations send parking instructions to install in automobile guard against theft implement through mobile phone message,within the burglar robbed alarm grab control command,and received the confirmation password permissions,stop automobile engine and to realize the remote control vehicle fuction. Moreover, when the traffic accident appeared, alarm super-large can be automatically call distress call, and inform the vehicle’s position information (need vehicle equipped with GPS), in case to miss the best treatment time and then supply the driver life security.Paper first introduced the subject of research and meaning, then summarized and generalized the status in quo of auto anti-theft and developing movement in home and overseas and proposed the content which need developed.In addition,the thesis also introduced GSM standards and the relevant instruction of AT,and the achievement about service of station location,then set forth the overall system design,the various functional modules and specific implementation details.According to the function that system will achieve,in the designed program to be considered the communication of PC and GSM,MCU and GSM,MCU and input and output modules,and how to locate the location of information,etc.Finally,paper summed up and summarized,and advanced the further prospect.The paper developed the mainstream of the C language as the developed platform,and fully consider the estensibility and reusability of system.The system is running stability and achieve the desired target after repeated testing. |
PDF Full Text Request