Research On A Monitering System For The Auto-passing Phase Separations Device Of HX_D Locomotive

Passing phase separations system which is an important on board device, is a vital component of control system of electric locomotives. With the development of the electrical railway and electronic information technology, at the end of nineties, APS(Auto-passing Phase Separations) device started to be adopted to electric locomotives in our country. HX_D1 and HX_D2 locomotives are the main type of locomotives used on DAQIN line. On-board automatic power-off scheme is adopted to the APS device on these locomotives. This device needs no manul operations and it can control the current rising slope, thus, introduce fewer impacting current. But this device may break erroneously and shorten the main break' s life span. And currently there are few testing equipments for this APS device. To test the device more efficiently and moniter it in realtime, this paper designs a monitering system for the APS device on HX_D1 locomotives, which renders a portable solution for device test and diagnosis. And the efficiency of field operation and maintenance will be improved greatly.This paper first introduces the importance of APS device on board.Comparisons are made between the early on-ground solutions and modern on-board APS solutions.The paper next introduces the Train Connect Networks potocols, and detailed illustrations are made to the MVB (Multifunction Vehicle Bus) potocols and the process data services it provides. At the end of that chapter, an overall design is put forward.Emphasis is made on the design of the hardware platform including choosing the CPU and extending memories. Meanwhile, the serial communication port and LCD interface circuits are illustrated.The software development procedure is demonstrated with details.First, the developing platform is constructed with the transplantation of the uClinux operating system. And an improvement for realtime scheduling is made. Also the design of the device drivers and the GUI platform is mentioned. In the end, the paper describes a multi-thread implementation of the main control program.