The Application Of LonWorks Technology In Train Running Safety Monitoring System

With the rapid development of our country national economy, everything has achieved greater request and more dependence on the railway transportation industry. It has become the major tendency that the train can run safely under the condition of high speed and heavy load. The country improves train operation speed several times in order to adapt to the demand of economic growth. Under such a premise, the research to the train running under the condition of high speed and heavy load appears inevitable and important right away. Through a series of parameters detected of critical piece such as the temperature of axle, the pressure of cylinder, the train running safety monitoring system is able to monitor the running condition of the train at any time, and determine whether the train running normally. Through this way we can enhance the safety and efficiency of train, and highest display the function of railway transportation. Therefore, the high reliability and perfect function of the train running safety monitoring system is necessary that the train can run under the condition of high speed and heavy load.After the human society enters the information times, the network technology has obtained a great development. The various advantage which the network has make it become a perfect solution of the train running safety monitoring system. The LonWorks technology has excellent outstanding openness and interoperability, so it is widely applies to the transportation, the building automation and the industries control domain at president. With its unique properties, the LonWorks network is accepted by more and more railroad technical persons, many railway research departments use this technology to engage in the train braking, linking and communication. This article has first analyzed current situation of the train running safety monitoring system at home and on abroad, discussed the significance of the research, and then carried on the introduction to the LonWorks technology, analyzed the feasibility of using the LonWorks technology to develop the train running safety monitoring system. The article also carried out research on the train running safety monitoring system based on the LonWorks communication network, analyzed and designed the train running safety monitoring system.The center of this design mainly concentrated on communication of the train running safety monitoring system, which is the communication unit - LON gateway. After contrasted and analyzed various schemes, the LON gateway which based on the dual-port RAM was designed from two aspects of software and hardware, and completed the laboratory debugging. It can realize the conversion of the communication protocols between serial port and LonWorks network. Through the gateway , information of each carriage can be easily send to the train LonWorks bus, so that the running condition of the train can be monitored online and informationization, and meet the requirement of railway to the train running safety monitoring system under high-speed and heavy load condition.