Rail Train Information Broadcasting System Controller Design

With constant raising speed of the railway, the time train running need becomes short in the same area coverage. The train which start running in the dusk can get the aim in the morning in about 1000 kilometres. Today, strong emphasizing improving the service of establishments and enhancing the competition ability of the passenger transport, the single-function broadcast can not be satisfied by the passengers, who need the geographical information and entertainment information broadcast etc. At the same time, with modern micro-electronics make great progress and develop highly, such as control technology, communication technology and so on. The automatic train information broadcast system becomes fact, Which has the GPS satellite position function.The GPS automatic train information broadcast that subject studies start with realizing schemes directly, namely adopt the single-chip system of 51 processors technology, CPLD technology, audio signal process technology etc realize the schemes design. The audio signal from five different of signal sources, input the audio Signal process module, which finish the audio signal volume regulate, all the signal sources switch, treble/bass set etc task. The controller adopt RS232 means communicate with the computer. It can show some important information which the Controller send to the computer on the liquid crystal screen. The controller adopt the Microcomputer 51 processors, that is signal-chip machine. This subject includes several following content of respects. Firstly, the interface of microcomputer and CPLD. The function of logic operation and control and the interface between signal-chip and signal-chip and parellel communication sending and receiving data have realized. Secondly, audio signal process and control. The part mainly realize these functions, which process different of signals, the audio signal volume regulate, all the signal sources switch, treble/bass set. Thirdly, communication module design. This part finish RS232,RS485,CAN bus communicate with others device. Finally, CMedia sound card design. The sound card belong to PC104plus series. The interface between the sound card and computer adopt the PCI bus. The sound card would beused in playing the MP3 files.