Research And Development On Automobile Intelligent Anti-theft System Based On Lfmc Technique

On the basis of having analyzed and researched on traditional automobile access control system and electronic anti-theft system, this paper has put forward a new type of automobile anti-theft system design scheme based on low-frequency magnetic communications (LFMC) technology, and completed the design of hardware, software system and debugging on both.This paper has analyzed automobile central control door-locked and traditional electronic anti-theft systems, and deeply made research on two key techniques including low-frequency magnetic communication (LFMC) and KEELOQ Hopping Code encryption/decryption techniques. According to the system functional requirements, we determined hardware schematic design, made analysis and selection of the system major devices, and designed the relevant control module circuits. The whole system can be divided into two parts including base station and remote controller, the base station consists of power module, high-frequency transceiver module, low-frequency launching module, central control door-locked and other control interface modules; the remote controller mainly consists of high-frequency transceiver module, low-frequency receiver module and key-press modules. The schematic design of system software was determined by the functional requirements and hardware scheme, it completed software design of the following modules including high-frequency communication module, low frequency communication module, control module, key-press processing and communication encryption module, and made analysis of the reliability of the system hardware and software design. Finally, all kinds of modules and system have been debugged jointly.Compared with traditional electronic anti-theft system, the intelligent vehicle anti-theft system, which is based on the low-frequency magnetic communication (LFMC) technology in this paper, has a certain degree of improvement in the aspects of humanity and security, and has also high application values and broad market prospects.