Design Of Home Security System Based On WSN

With the continuous development of science and technology and people's living standards continue to improve,people pay more attention to residential safety.Stable and reliable home security system makes people's life more convenient and safe.Traditional home security system cumbersome wiring,and the stability is not high,prone to false alarms,the indoor appearance decreased.In terms of technology,people require real-time monitoring,inspection alarm or user home,resulting in a large waste of resources and lack of intelligence.WSN home security system is a use of modern electronic information technology and network technology to achieve home and user real-time information feedback home security system.The home security system is designed by S3C2440ARM9 central processor,WSN through a variety of sensors in real-time detection of the status of the family,and through the central processing unit to information processing,judgments,integration,conclusions,GSM network sent to the user's mobile phone end.The hardware design of the system is composed of Zig Bee module,central processing module,wireless sensor module and mobile communication module.The system software design includes: mobile communication module programming;sensor testing program design;wireless sensor nodes time and space diagnosis algorithm design;information fusion algorithm design;alarm and control program design;Android phone home security control system APP design.In this paper,WSN node time domain and spatial domain fault diagnosis method combined with information fusion technology to effectively reduce the family accident risk and false alarm rate.Firstly,the time domain and space domain diagnosis methods of WSN nodes are studied,and some deficiencies are improved,and the diagnostic accuracy of each method is improved.Then,in the information fusion technology of the two diagnostic results,the selection of D-S evidence criterion is selected,and the improved algorithm is adopted to improve the classical D-S evidence criterion,and the information fusion of the conflict evidence is improved.Through the simulation experiment on Matlab platform,this algorithm can realize the early warning of home security system,and effectively improve the accuracy of the system.At last,the hardware and software of the system are debugged.Debugging run analysis shows that the system is reliable and normal operation.Thus realizes the real-time monitoring to the house.