| After the sixth speed-up in national railway, the traffic safety of the trains is becoming more and more important. Trains are running at a higher speed and with longer working intervals. The high speed railway imposes much higher and stricter requirements on our capability to monitor the locomotive vehicle, to respond the emergency, and to deal with the faults happened in transit quickly and timely.Since the vehicle electric drive circuit is the central monitoring system, its currency stability has a direct effect on the running of the locomotive. The electric drive circuit has more than often had faults as working in the high temperature environment and in the motion of vibration. The statistics data reveals that more than 40% locomotive faults are related to the electric drive circuit and the diagnosis is not an easy job. To develop the dynamic diagnosis system and to build the closed loop vehicle running status data system backed up by the existing wire and wireless telecommunication system, the closed loop system could make the "vehicle to surface", "vehicle to vehicle", "surface to vehicle" and "surface to surface" data exchanges, which enable the vehicle safety related equipments under command and control, and provide reliable and timely data for administrating the transportations and vehicles, and for backing up the repair and rescue works. The development satisfies all levels of safety control Decision-making body and the locomotive management Maintenance department's application software, realizes the locomotive movement safe monitor information centralized monitor, the early warning, provides the security information integration analysis and the policy-making support, constitutes the complete locomotive movement safety control system.The different primary device has carried on the breakdown description, which is on the vehicle electric drive circuit, and takes this as the basis, analyzes the entire vehicle electric drive circuit. According to the locomotive supervisory system's network architecture, the vehicle carrying system's structure as well as the sampling of the driving status messages, designing the locomotive supervisory system from two aspects which are the hardware, the software. In the hardware design, introducing the NIOS II hardware system's production in detail, including the SDRAM controller, PIO controller and circuit logic mirror image design and so on, simultaneously designing the external hardware electric circuits which correspond with the IP nucleuses. In the software design, taking the embedded operating systemμc/os II as the system software frame, elaborating the locomotive state control function software design take this as the foundation, narrating the expansion partial software: The user interactive contact surface, the GPRS wireless transmission and the LCD drive's design and realization.This paper analyzes the locomotive electric drive circuit and the vehicle running status monitoring system, mainly accomplishing the following works.1. To detect and diagnose the faults of the vehicle electric drive circuit timely and correctly, and to trace the cause to the vehicle parts.2. To provide prediction information for the un-normal running locomotive vehicles, and to facilitate the surface dispatcher tracing.3. To detect the basic running status data, and transfer all data to the surface and save there. |
