The Design Of Guard Against Theft And Alarm System Based On GSM

With the fast development of mobile telecommunication technology, distance control technology has more and more research value in theory and practice. It integrates mobile communication, digital signal processing, automation control, micro-control technology and so on, widely used in many fields, for example, distance control technology of robot, guard against theft of automobile and distance control technology of industry machine, it's disadvantage is that it can realizes bidirectional real-time communication and it doesn't be limited by the region. Guard against theft and alarm system in this paper is an application of distance control technology.Guard against theft and alarm system is researched on in this paper. The main tasks are as the follows.Firstly, the present development of distance control technology and alarm device, the principle of SMS technology are introduced in detail in this paper. Basic function of system is analyzed and the general design scheme is advanced.Secondly, the hardware and software of the system is designed based on basic function of alarm device. The hardware consists of single chip microcontroller and mobile telecommunication module, data transmission between the single chip microcontroller and mobile telecommunication module is realized by AT instruction, mobile telecommunication module achieves the distance communication between the system and cell phone users using GSM network. The software of system can be divided into two parts: the first part is program design of mobile telecommunication module, the second part is RAM layout and program design of data read-write. The software realizes functions, such as initialization of system, recognition and save the number of cell phone users, the choice and design of alarm SMS, the method of deal with the"long"messages, and how to put the telephone number of the user into the message which is going to be send out.Finally, the test results show that the hardware and software can work normally and realize bidirectional real-time communication between system and cell phone users.