The Research Of The Lon Works Fieldbus Technology Application To Building Automation System

With the rapid development of the information technology, intelligent building has been got used more and more, the building automation system is a key part of the intelligent building. "The automation isolated island" is very easy to be engendered in the traditional building automation system, because the close communication protocols are widely used. LonWorks fieldbus, with its open communication protocol and characteristics of constructing the scene measure and control network very convenient, can resolve the above problem very well. This paper gives a constructing project of the building automation system established in development and design by ourselves and based on LonWorks, completes several primary component's hardware and software development and design and constructs a building automation system based on intelligent nodes and LonWorks, arms at a lot of the domestic pony high buildings and the constructing requirement of building automation system which bankroll is not very abundant in current and combines close the part of research contents of a scientific research item authorized by the Education Department of Hunan province, which item is" the application research of fieldbus technology in the building automation system". This paper introducs the basic concepts of intelligent building and building automation system, discusses the characteristics of fieldbus and makes comparison of a few familiar fieldbus and studies thoroughly the core contents of the LonWorks fieldbus, including Neuron chip, LonTalk protocol, LonTalk transceiver, Neuron C language and LonWorks development kits etc. The paper proposed means of "using electricity parameters collection Lon network intelligent node module" has used the survey technology based on true root mean square. The system realizes to intellectualized manage user's parameter and function of long-distance copies the table through network. The proposed temperature control intelligent node based on 1-wire single bus technology and digital temperature sensor technology effectively solves measuring multi-spot temperature, measure spot decentralization, disposing wire difficultly and sensor power supply difficulty. It greatly simplifies structure of the measure and control system. The proposed system has been computer simulated, debugged and measured, which indicates its performance very good and validates the application value of the research and development production of this paper. The system has some popularizing significance.