Design And Implement Of Security System In Smart Home Based On Internet Of Things

With the development of Internet of Things (IOT), wireless sensor networks (WSN),embedded microcontroller, mobile communications and other modern network informationtechnology, smart home market will be growing fastly. Intelligent home control system,which is specialization、 integration、 low cost, will generate enormous businessopportunities.When smart home is getting into people s lives,home security has become theprimary requirem ents for intelligent home so that intelligent home security system hasbecome an important part of the intelligent home.The traditional smart home security systems have single function, high false alarm rate,can not achieve real-time remote network alarm and not record the siteconditions and evidence of a crime. To solve the shortcomings and meet intelligent needs ofmodern home, a solution of smart home security system based on IOT is proposed in thepaper. The system is made use of maturity embedded microcontroller technology andcombined of IOT, the third-generation mobile communication (3G), global positioningsystem (GPS), location based services (LBS) and others new technologies currently available.According to the individual needs of modern people in the solution, such as intelligent accesscontrol, environmental monitoring of WSN, moving object positioning, remote monitoringand other security subsystems,they are combined together to realize"people-oriented" new home life security experience by wireless network intelligent controland management. In this paper, the following tasks had been completed:Firstly, The design and realization of intelligent home security system architecture and major functional modules. The overall design of smart home security system is implementedin accordance with the modular forms in this paper so that supporting modules are selectedeasily according to people’s needs. The system design consists of five functional modulesincludes the central controller, the intelligent access control, the environmentalmonitoring of WSN, the moving object positioning and the remote monitoring, and is used aPC or Tablet PC as the central controller, the SPCE061A microcontroller of lingyangcompany microcontroller core as the other modules control panel. The system will to beensured the identity and security identified by the identification method of access controlsystem, and to be ensured the safety of the home environment detection and alarm functionsby WSN layout and data transmission mode, and to be provided the necessary real-timelocation tracking for home moving objects by a the LBS moving object monitoring algorithm,and to be ensured that real-time security monitoring of the home environment by embeddedweb server remote monitoring system.Secondly, the design and implementation of module system structure and routingalgorithm of environmental monitoring based on WSN. The module is primarily for the homeenvironment to provide real-time environmental monitoring and alarm processing. WSNenvironment monitoring subsystem is built by the gas flame, smoke, human infrared sensors,temperature, humidity, light sensor and the central controller. As well as to improve thereal-time nature of the system, a real-time threshold routing algorithm (Real-time ThresholdRouting Algorithm)(referred to as RTTRA) is design and implemented based on LEACHprotocol.Thirdly, the design and implementation of system control strategies and identification ofintelligent access control module. The module is mainly in order to guarantee the security ofthe user to enter the home, intelligent access control strategy is designed by monitoring mode;user identity identifying method is designed by the capacity of the image of the specificperson is identified, the identification of a specific user’s voice and digital signaturetechnology.Finally, through application testing and security and integration testing analysis of eachsystem module and performance measurement and analysis of the smart home security system,the results show that the solutions in the paper can be meet intelligent demand of people forreal-time, safety, dynamics, reliability and simplicity in smart home, and has a certain degreeof market prospects and practical value, so that it should be provided a theoreticalreference and practical application case for the design of a new generation of smart home.