The Design Of Dynamac Railway Scale Data Control System Based On FPGA

Dynamic Railway Scale is a new value equipment which was beginning to be applied in the filed of dynamic weighing in the 90's last century, and gets more and more attention because of its'important effect in railway traffic and mines transportation. Control system is the core control instruments of Dynamic Railway Scale. Nowadays the design of railway scale used microcontroller or DSP as the control core, the structure and function of this traditional design methods are relatively fixed, lacking of flexibility and upgrades space to both hardware and software.The purpose of this design is to design a dynamic track weighting control system which takes SOPC solutions of ALTERA Company. The program which including the sampling part and an external Ethernet transmission part used Niosâ…¡processor system as the core. Frequency divided part were designed for different parts in VHDL based on the FPGA devices'characteristics of parallel processing. The main parts of the paper are:1.SOPC design plan is proposed; Built control system develop platform with Cyclone series FPGA chip of ALTERA company and the corresponding external memory;2. Achieved data sampled control system design with using AD7714 as AD converter;3. Achieved Ethernet transmission with Microchip's Ethernet controller ENC28J60, Embedded real-time operating system uC/OS-â…¡in the Niosâ…¡; Transplant the Nichestack TCP/IP protocol stack into uC/OS-â…¡.The principle of system,design program,hardware selection,system implementation based on VHDL and analysis were introduced in the Paper...