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With the popularity of cars and other vehicles , mobile communications technology and global positioning (GPS) technology is gradually applied to a vehicle monitoring and other fields. Based on GPS technology and GSM networks car alarm system , car alarm has become a hot research field . Vehicle positioning paper discusses in detail the anti-theft system the basic principles involved , given system design, module selection , design and power supply system hardware circuit design, software programming and system testing . In hardware design , the paper mainly uses the top-down design methodology , based on modular design system function ; Firstly, the software design system functions based requirements analysis, design of the overall architecture of the system control software , gives the total of the total module processing software flow chart , and details the key technologies ; debugging the system , this paper describes the detailed software testing and debugging , to ensure stable and reliable system operation. After debugging software and hardware with the system to stabilize the operation. The topics studied car alarm smart technology in the domestic industry is basically in a blank state , the development of products with low cost, low power consumption , simple operation, easy to use features , in the domestic leading level, with broad market prospects , with a very strong social benefits.
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