Design Of Security Guard Node For Intelligent Community Based On Lonworks

Intelligent community is a new type residence produced in recent years with the rapid rise. The security guard system is one important component of intelligent community system, and the security guard node is the main factor of security guard system.In this thesis the security guard node is developed by using the characteristics of open and interoperability of Lonworks bus. The designed intelligent security guard node is based on the host, and the control module is composed of neuron chip MC143150, double wring line transceiver FTT-10A and single chip AT89S51. The single chip AT89S51 is used as main processor to accomplish the application program of users, and it is responsible for the collection and control of field signal. The neuron chip MC143150 worked under the A form as the slave processor mainly accomplishes the communication of nodes on field net and central control room. The software part of security guard node is wrote according to LonMark, and it can realize the interoperation with LonMark products of other manufacturers.Finally the security guard node designed in this thesis is applied in the security guard subsystem in the lab of Huaian Information and Technology College.The central monitor computer system is developed by kingview, and the communication between central monitor computer system and security guard node is connected by LNS DDE(Dynamic Data Exchange) to complete the data processing, communications, and display. The design of intelligent nodes used the most advanced field bus technology, with advantages of simple structure, high reliability and easy product. Its products are middle-level family-oriented ones and had a broad application market. At present, the application of Lonworks technology and the design of intelligent buildings have just begun in china; as more and more professionals understand, I believe it will have a broader future.