The Application Research Of Temperature Control System Base On LonWorks

Along with the development of technical and the enhancement of automation, the automatic monitor of temperature control system already became an important method which can make produce safely and reduce loss. Because the substations of monitors are far away, if using traditional method the cycle is long and the cost is high, moreover, the survey crew must work on locale point, therefore the working efficiency is extremely low and not convenient to manage. Based on the platform of LonWorks, the temperature control system can achieve the request well, using the platform of LonWorks, the technology of sensor, the peripheral circuit and the control interface of VB software, it realized the temperature real-time gathering, through the LonWorks network communication, realizes the functions of data transmission, memory and real-time monitoring, real-time refresh, fast diagnosis and so on, it is an intelligent and highly effective system in automatic monitor.LonWorks (Local Operating Networks) was created in March, Echelon Corporation in 1991 at USA. Because of its open, mutually operating LonWorks gradually became one of most competitive field buses at present, has provided the powerful method to distributional supervisory system. Under its support, was born the new generation of intellectualized and low production. In order to support the LonWorks, Echelon Corporation has created the LonWorks technology. It provided a complete platform to the design and produce of field bus.At first the paper introduced the field bus and the LonWorks, the situation and the background of the LonWorks at present, the topic of research content, the key questions to solve, innovation and so on. In the second chapter, it firstly introduced the questions of the temperature control system, introduced the LonWorks in the situation, is open, mutually operational and so on many superiority, then introduced the Neuron chip and the platform of LonWorks, including network management tool LonMaker, NodeBuilder development kit as well as LNS DDE Server. In the third chapter, it provided the designed method and the development flow of temperature control system, then respectively carries on the introduction in view of the temperature system from the hardware and the software, in the hardware aspect is the LonWorks control module and the periphery circuit design, in the software aspect is mainly aims at data sample module, the data manage module. In the fourth chapter, it has produced the overall plan of the temperature control system, has set up the network completely using LonMaker, establish communication between VB control interface and the LonWorks network, between the VB control interface and the TMS database, introduced some functions of the temperature control system .In the end, it has analyzed good and bad points of the design, has pointed further way to improve the work in the practical application.