Research On Vehicle Anti-theft System Based On GSM

With the automobile industry continues to grow, China’s automobile production and sales for many years to occupy the first in the world, the situation of car theft is more and more serious. Therefore, the relevant products about vehicle anti-theft are essential. Vehicle anti-theft technology has experienced four stages of development, namely mechanical, electronic, chip type and network type. In China, for technical and price factors, electronic type vehicle anti-theft system still use more.Ordinary vehicle anti-theft products popularly on the current market mostly have single function, poor stability and no tracking function, in view of this situation, this paper designs a network type vehicle anti-theft system based on GSM. The system includes traditional anti-theft technology, GSM technology, GPS technology, embedded technology and sensor technology, build an interactive platform for cars and their owners or monitoring center, the owner or the monitoring center can not only receive status information of the system, but also can monitor the status of the car and send control instructions, so realize a full range of the vehicle anti-theft system.In this paper, a detailed study of the relevant principles of vehicle anti-theft system, including the GSM principle, AT instruction, PDU mode, GPS positioning principle, base station positioning principle and NMEA-0183 protocol. The vehicle anti-theft system are designed, completed the design of hardware structure of the system and the function and circuit of each module, including GSM module, GPS module, embedded microcontroller module, sensor module, power supply circuit module, liquid crystal display module, relay module, anti-theft alarm module etc. At the same time also completed the design of control software of vehicle anti-theft system, mainly to complete the short messages transceiver, GPS positioning information receiving, sensor signal processing, liquid crystal display control, relay control and other control function of the major components, and realize the mobile phone mobile terminal and computer terminal synchronous latitude and longitude coordinate display.Each part of the system are made of low cost, low power consumption module, the system is easy to operate,simple to use, comprehensive functions, highly cost-effective, but also the traditional electronic anti-theft system to be modified, can reduce the cost of investment, has a very high use value and social benefits.