Design Of Vehicle Anti-Theft System Based On GPRS And GPS

With the rapid development of economy, people's living standard enhance unceasingly, and the amount of private cars increases gradually. At the same time, more and more car stolen affairs happened around us. The system of guard against theft has become an absolutely necessary equipment of vehicles; however the traditional guard systems have too much shortcoming, such as short distance and low reliability. Based on GPRS and GPS technology, this paper realizes car alarm system using ARM as the main controller. When the sensor module detects theft of car, the system would inform the owner through GPRS module by SMS, then the owner could give oders to stolen car remotely, like locked oil, voice alarm and getting GPS information through the GPS module. The system can realize Human-car corresponding,all-weather detect and control under the GPRS.Main contents in this paper include:(1) This paper gives an overall design of the system of guard against theft according to needing objectives, then devides the system into GPRS module, GPS module and control module, and briefly introduces the principle and technical advantage of GPRS and GPS positioning principle.(2) Using the ARM LPC2368 microprocessor as the main controller, according to the system's function this issue completes the sensor module, GPRS communication module, GPS module, protection modules and relay control module selection and hardware circuit design.(3) The software design of system of guard against theft includes software design of sensor module, software design of GPRS module and software design of GPS module. On the basis of a brief analysis about control mechanism of SIM300 serial interface communication, AT instructions, PDU mode analysis of short information communication and extraction of GPS positioning information, thei paper implements some main applications, such as software design of acceleration sensor, software design of ultrasonic sensors, sending short information of PDU mode communication of PDU mode and the design of GPS positioning task.System can realize detection trespassed, communication between owner and system, acquiring GPS positioning information, control system open and remote control operation, with high practical value.