Zigbee Technology Based On The Intelligent Village Safe Guard System Development

With the development of national economy, people have higher quality of life to pursue and achieve home network, information is the development of smart home system at home and abroad a new trend. Intelligent home security system as an important component of the system, its development and progress related to the smart home system as a whole. Wiring in the building design information for transmission lines to the existing security systems use more community approach. This approach has many drawbacks, including cumbersome wiring, extended poor performance, when the lines are aging, wear and tear, the false alarm rate are all the more serious shortcomings of this approach. To address this wired residential security systems the existence of many problems, this issue presents a community based on ZigBee technology, security system, it avoids the disadvantage of wired residential security systems at the same time the appeal has its many advantages, such as low power consumption, low cost, system reliability can be higher.ZigBee technology is based on a close IEEE.802.15.4standards, low complexity, low power, low data rate, low-cost two-way wirelesscommunications technology. It uses the free2.4GHz frequency band, the network can accommodate up to254devices and a master device from the communication distance of up to1Km. The device has a powerful networking capabilities, supports three types of self-organizing wireless networks, namely star structure, network structure (Mesh) and tree (Cluster tree), and the system has a multi-hop routing node, in particular, composition of the cellular network to the network structure, with strong network robustness and system reliability.ZigBee technology for cell-based wireless security system selected core CPU JN5121chip; system terminal equipment of choice is unique to the human body reacts to the infrared wavelength of lOum D203S and gas detectors KGS-20; signal via wireless transmission from the user node reached the router network relay stations, relay stations and then transmitted to the ZigBee by the central node, the central node to send data through the RS232data lines to the management host; district managers or security technology through computer-based VB management page to get accurate information on the alarm location. The system uses a tree topology, the control room is equipped with ZigBee central node (Coordinator), each floor is equipped with a routing node (Router), the user terminal using the terminal node (End Device), the terminal nodes are battery powered, usually working in Sleep state, need to wake up dormant data transfer, up to send data. System has a circuit design is simple, no false negative and false positive, self-test function, cost performance characteristics of the construction of residential security systems play an important role.