A Car Theft Deterrent Research Based On Multi-sensor Information Fusion Technology

With the economic rapid development in China, and the standards of people’s living improved steadily, the car began to a member of an ordinary family, more and more families became car owners. For the event of car theft becoming even more violent, car security remote has become top issue to be resolved in today’s society. In order to protect consumer rights and interests better, ensure the safety of car, and reduce the incidence rate of car theft. It is becoming more urgent that researching an automobile security alarm system with safety, energy conservation and green.Firstly, this thesis discussed the background and significance of the subject, and introduced status and development trend of anti-theft system in domestic and international. And on the basis of this, analyzing and summarizing the performance requirements and targets to the design of vehicle anti-theft alarm system. By analyzing the traditional and current mainstream design of automobile anti-theft alarm system, doing research through the traditional approaches and optimization of the contemporary mainstream anti-theft program, summing up the design idea and the structure of the program of automobile anti-theft alarm system.Secondly, the thesis designed the realizing solution for system’s implementation hardware. First of all, to design the hardware structure of the automobile anti-theft alarm system, then to design each module which includes the power supply module, RFID key module, DSP central processing module, the police situation response module, monitoring module of the system. At last, considering the various means used by the vehicle thieves, the author selected appropriate sensors, and planned the transducer which included the door monitor unit and bank angle of body, tracking a human target and testing broken windows. We used DSP to work together to reconcile so that the system can achieve greater purpose of the correctness of alarm.Finally, the thesis designed the software of the automobile security alarm system. In the first place, the author described DSP development environment and development language, following and introduced the flow chart of anti-theft alarm system. On the basis of each modular design ideas, the workflow of each module was designed. The thesis expounded statement for multi-sensor information fusion algorithm in detail. For the sake of verifying the effectiveness of the work, the author calculated the laboratory finding by MATLAB software on the basis of experimental data testing, finally, analyzed and obtained results that the car alarm system worked closer to the real situation by D-S evidence theory information fusion way, moreover, the more sensor the system has, the lower uncertainty the system is, so the system meets the design requirements.