Design And Realization Of Building Automation System Based On Lon Bus

Along with the development of economy, construction scale in China is keeping ahead all over the world. Intelligent building is also keeping in a very high requirement. Intellectualized mansion is the result of the economy development and life improvement. The monitoring system is turning more and more popular in the intelligent building. The objects which need to be monitored are being diversified. It is necessary to build a kind of system which is provided with the uniform criterion, high reliability, agile establishment, good expansibility, convenient maintenance, good function and low price. Therefore, as one of the important parts of intelligent building--the research in the intellective node is of crucial significance. LonWorks network control technology is a new-style fieldbus technology. LON bus which is a kind of the most popular fieldbus has application in building, traffic, energy sources and so on. LonWorks technology gathers computer, network and control, integrates all seven layers protocol of ISO/OSI, and realizes communication and control functions, being flexible in grouping and good at opening. This thesis introduces a realization method of the applications of LonWorks network control system to building automation system, particularly discusses the design clue and hardware circuit and software design of intellectualized temperature measureing and controlling node, and also analyses EMC for the system. Central monitoring system connects LonWorks network with PC by the LonTalk protocol adaptor card. Intellectualized temperature measureing and controlling node adopts Neuron chip MC143150 as communication CPU. Transmission medium adopts twisted-pair. Neuron C Language is used for intellectualized temperature measureing and controlling node programming. The man-machine conversation of the central monitoring system is programmed by VB6.0.