Design And Implementation Of Reliablity Of On-board Equipment Used In EMU Maintenance Information Communication System

With the rapid development of china high speed railway, more and more EMU are put into used. In order to ensure the operation safety of EMU, how to improve the efficiency and quality of train maintenance is an urgent problem, which we must solve. At present, the maintenance system of EMU can't get the condition and fault information that produced by the train at real time. For this we can't develop the maintenance plan in time. So we need use new technology and method to solve it. We develop a communication system which transmission the maintenance information of EMU by GPRS. This system can collect the condition and fault information of EMU in real time, and transmit them to the ground maintenance center. This is helpful for us to develop the maintenance plan in time and improve the efficiency of maintenance.At the same time of develop the system, combine with the theory of reliability, the focus of our research is how to improve the system's reliability. In order to ensure the system can work stable in the harsh environment fill with electromagnetic interference and no people to participate in, our research is mainly about three aspects.First, design reliability of hardware. According to the needs, we select the hardware unit and we carry out an EMC design for the key unit, such as chassis, power.Second, design reliability of software. We insert checkpoint in the application program to detect the problem. Then we divided the fault into defferent level, if the problem is serious, we used the watchdog to make sure the system can automatic recovery. We create a log file to record the remaining fault information of the system. This file can be used in the remote monitoring. We also make up a firewall rule to ensure security of network.Finally, we proposed a method of remote monitor and develop the function. Used the remote monitoring, we can land the server at ground maintenance center, for this we can know the running condition of the system at real time. This method can help us analysis the problem and solve it in time. The reliability of system is improved.The equipment we developed has already pass the EMC test ,achieve the request of standard TB/T 3034—2002 EMC tests and limits for rolling stock apparatus. We also test the function of the remote monitoring.