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With the rapid development of national economy and improvement of people’s livingstandards, the family car has become more and more popular. Automobile anti-theft isparticularly important, has become an urgent social problem. At present, although the majorityof the car with anti-theft device, anti-theft device types on the market range, but there aresome shortcomings: one is false, false alarm anti-theft device rate; two is the anti-theft devicehas single function.According to the two disadvantages of above the anti-theft device, this paper presents anew type of vehicle anti-theft alarm positioning system. Introducing multiple sensor systemdesign, can effectively solve the problem of high false alarm rate, false negative. At the sametime, the introduction of GPS/GSM module in the system, when it is judged that theautomobile is in, the anti-theft system microprocessor will receive the coordinate data andelevation data from the GPS, and through GSM sent text messages to mobile phone set by theuser, the user can access Internet via mobile phone or computer, convenient query to thevehicle location. In addition, in order to facilitate the users to change the mobile phonenumber, the design of the keyboard and LCD display. The user can input through thekeyboard to bind the mobile phone number, and can be displayed on the screen. Relying onwireless communication, can effectively solve the problem of insufficient distance alarmeffectively.The utility model car anti-theft alarm positioning system is divided into the centralprocessor module, monitoring module, control module, GPS positioning module, GSMwireless network communication module and display module. Among them, including the hall sensor monitoring module, pyroelectric infrared sensor, vibration sensor and tilt sensor;control module comprises a remote control switch and keyboard. In this paper, for thepreparation of hardware circuit design and software program of each module. And analyzedthe overall performance and anti-interference, delay. The results show that, the system runsnormally, meet the design requirements.
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