Design And Implementation On Software Of Temporary Train Control On-board System Base On ARM

With the continued speeding up of the railway, the train safety issues increasingly become ahot topic in recent years. Those serious accidents indicate that there are still lots of deficienci-es in the field of domestic train control, especially in the temporary speed limits area. More-over, the mixed human factors and low level of automation has threatened the safety of thetrain. Although LKJ and CTCS system are already used, its high cost and poor adaptabili-ty of the temporary speed limit area become a major constraint. Therefore, it makes sense toresearch a low costing and highly safe train control system.Usually on-board device is a key part of the train control system. It’s used to supervisespeed, warn and control the train. The temporary train control on-board system studied in thispaper is an auxiliary monitoring and control device for trains traveling in the area of tempora-ry speed limit. This paper uses ARM7for its master chip. It focuses on the design and imple-mentation of the software. Firstly, this paper introduces the system briefly. Then it expoundesthe functional requirements and the software architecture, and proposes a speed limited nestedprograms for temporary speed restriction area, vehicle communication protocols and operat-ing mechanism. Secondly, this paper implements the software on the platform of KeilμVision4.And it uses data structure and timer interrupt to achieve its three functional modulesin detail. At last, this paper testes on the software functionality. The test makes a conclusionthat the system is able to do a warning and control for the temporary speed limit area.