Research Of Electric Power Intelligent Terminal's Communication Software And Compress Algorithm Based On ARM9

With the coming of 21 century, intelligent terminal development has been the popular research object. The huge market demand and profit space attracts attentions of enterprises and scientific research institution. In electric power system, intelligent terminal is applied to transformer substation, and large power consumers, in which GPRS/CDMA or other communication modes now have been used to communicate with electric power management main station. With the increasing demand of terminal performance and security in the industry condition, many disadvantages appear in former terminal. Focusing on such situation, the traditional design schemes of intelligent terminal were analyzed and summarized in the dissertation, and then MIZI Linux embedded operation system and ARM9 microprocessor was adopted as terminal's development flatform, industry Ethernet was chosen to be communication channel at the same time. The main works of the dissertation list as follows:(1) The design scheme based on ARM9 development board and MIZI Linux embedded operation system was given according to the character of intelligent terminals. The software and hardware development platform of MIZI Linux embedded operation system was built.(2) Based on (1) , the terminal used the DM9000 chip to control Ethernet communication. After the communication module was used successfully, socket network programme was programmed in Linux. Then the intelligent terminal's Ethernet communication function was realized.(3) RAY-Period compression algorithm was added to the terminal to decrease the network data flux and reduce the running charge. Kinds of compression algorithms were studied and RAY-Period compression algorithm was studied deeply. And the RAY-Period compression algorithm was realized with C++ in the Linux operation system.(4) Qt/Embedded development kit was chosen to develop the terminal's GUI after the most popular of embedded GUI development tools were researched, and the terminal's display function was realized.(5) The all modules were united, and the integrity module was debugged in the Linux operation system. Finally the terminal can compress the data and transmit the data with main station using Ethernet.