Research Of Distributed Data Acquisition And Processing System

With the rapid development of China's railroad industry, the new transport EMU has increasingly arouse people's attention for it's high-speed, comfort and fashion. At the same time, people need to be more accurate, fast and convenient access to the large amounts of data and gain a better improvement. As the EMU-wide enclosed design, add the slow speed and low reliability of traditional single chip, embedded system is undoubtedly the best option. In recent years, embedded computer is further applied to industry, agriculture, education, national defense, scientific research and daily life and other fields. Currently, the development of embedded Linux technology, data acquisition technology and integrated network management technology formally adapted to this trend. Embedded systems using Linux technology is a equipment of small, portable, easy-to-network and lowly costs, set the signal acquisition and processing as a whole. It has broad application prospects.In this paper, using embedded Linux as the operating system for handling the company's S3C2440 embedded processor research and design an embedded distributed data acquisition system. Papers analyzing the Linux device driver based on the basic working principle is discussed frequently encountered in developing interrupt handling, I/O ports, and based on the ARM 920T embedded processor system in reading, write the character device driver of external RAM, and network management.This paper designed an board of AD data acquisition to carry out drive and data acquisition. Build an embedded Linux platform, carry through the kernel transplanting and modify kernel code to adapt to S3C2440 development board. the whole software components are completed under Linux system. Distributed network management using the approach a manager and a number of sub-systems, through the router dynamically assigned addresses, the manager and the subsystem can pass the entire network information, so that the whole system composed of a closed self-organization distributed data acquisition management system, add or reduce the sub-systems will not affect its function.Experiments show that is technically entirely feasible to constructed the ARM-based embedded Linux distributed data acquisition system, and applied to areas such as industrial measurement and control. Finally, the papers summarized the system, also raised the inadequacy of the design and improvement ideas for the further study of the subject.