An Multi-Channel&Multi-Functional Data Acquisition Device Based On STM32and FPGA

In recent years, China have made astonishing development in railway traffic field. In the domain of high-speed railway, we had developed two types of CRH high-speed train which could operating over380km/h, named CRH380A and CRH380B. In addition, we built three long distance inter-province high speed railways. On the other side, in the field of city railway transportation, there are quite a few cities obtained comprehensive inner city railway network and many more cities are constructing their metro lines. Apart from private cars, the maintenance of rolling stocks are quite difficult, high intensity and with limited time window. Due to this situation, real-time monitoring of railway trains not only ensures the operation security but also gives the maintenance squad critical and useful information, by which the strength and the uncertainty of the maintenance will be significantly lowered. The DAQ (Data acquisition system) is the key component of the real-time monitoring system.In this paper, we proposed an embedded DAQ system based on Altera FPGA and STM32micro-controller, according to problems we had on IPC, our system has an independent battery power supply to avoid noise alone with AC supply, and it also can be installed on a rolling stock quite conveniently.In the first chapter, we introduced the background and the development situation of the DAQ. In the following chapter, we illustrated the whole design of our system. Within the3rd chapter and the4th chapter, we described the detailed design and realization of our Date acquisition and conditioning blocks based on FPGA, and file storage system, network module and Zigbee wireless communication part based on STM32micro-controller and RT-Thread real-time operating system. Hence, HMI(human-machine interface) on the master computer, hardware commissioning and software debugging were briefed in the last part. Last but not the least, we summarized the shortages and scarcities of our DAQ system and gave out our expectation of its future development.