Owing to the low efficiency and the high cost of the traditional track inspection system, a new track inspection system is designed on the basis of the GPS global positioning technology and the GPRS wireless communication technology. Four primary modules of the hardware of the GPS data acquisition system are designed and explained in detail, including the GPS data acquisition module, the GPRS communication module, the single-chip microcomputer minimum system and the power transition module. The GPS data acquisition module consists of four GPS modules in the base station and a GPS node in the moving station that realizes the unity of the relative and absolute measurements and improves the positioning accuracy. It is shown that the GPS data acquisition operates in real-time and is accurate, and the data update rate is as high as 50 Hz; The application of the GPRS communication module makes the data transmission convenient and quick; The data are firstly cached in the flash storage, are uploaded to the upper computer for storage and processing afterwards, the system capacity is up to 500 G, the data processing is simple and efficient.

track inspection  /  GPS data acquisition  /  hardware design