Research Of The GPS Integrated Positional System Of Train Based On ARM-Linux

The safety and effective railway is very important to our country. People have paid more and more attention to the accurate position of train. Now, there are too little method of train position, and the useful of them are limited by nature. So making use of GPS technology to accomplish integrated position by combine with other methods of position. This is immunity against the nature and it could improve the positional precision remarkable, improve the safety of running train and the effective of allot orders which been sent by control center.Firstly, analyze traditional DR positional method and the actuality of railway. Then design a new DR method to make use of GIS. Analyze the algorithm of it and it's limitation. Combine GPS and this new method to integrated positional system. This method can provide more accurate informarion of position. At the same time, make use of inquire/answer device installed at special place to get sure position information. In consideration of mul-information combine, analyze the actuality and make use of Kalman-filter to accomplish information combine, to get more accurate positional information, and then simulated this plan, analyse the result of this system.After comparing some popular MCU and operating-system, choose ARM-Linux to built the system-plat. Analyze Linux transplant or the method of it's install, and analyze Linux's mul-pthread technology, make use of it to mul-task collateral operating of this integrated positional system.