Software Development Of Net Electric Energy Meter Data Collector Based On Microprocessor

New microprocessor-based data collector software of intelligent network electric meters was developed in this dissertation to meet the technical requirements of Hybrid Fiber Coax (HFC) intelligent network electric energy meter system project. The electric power company can easily gather the real-time electric energy meter status and consume amount of certain city industrial or citizen users through the computer network system composed of electric network monitoring and controlling computer -electric energy data collector-electric energy meter, carry out the specific charging plans such as various electric prices in different time periods, and obtain better reference information for real-time data monitoring and maintaining of electric power transmission.Since the electric energy meter data collectors are in the middle layer of HFC network structure of electric energy transportation monitoring and controlling information system, its software should realize the following functions at least: receiving, analyzing and decomposing the instructions sent by master monitoring and controlling computer, real conveying the instructions of master computer to the electric energy meters by means of point to point, capturing the status data of electric energy meters, composing specific message frames and uploading them to the master computer via Internet. In the hardware system of electric energy meter data collector, general microprocessor exchanges data or instructions with electric energy transportation monitoring and controlling system by means of the Internet card and TCP/IP protocol.As the most important part of this paper, the software system of electric energy meter data collector was realized by integrated developing tools of Keil C51. Microprocessor C51 language was used in writing program. This software is composed of the following three functional modules: data collector module, serial data communicating module and networkcommunicating module respectively. The data collector module includes analysis sub-module of command data frame, protocol exchange sub-module and electric energy data synthesizing sub-module of up-sending frame. The serial data-communicating module includes serial port initialization sub-module, data sending sub-module and data receiving sub-module. Network communicating module includes network card initialization sub-module, data sending sub-module and data receiving sub-module. The flow charts of main function programming involved by various functional modules were listed out, and the detail codes of some specific module function such as command data frame analysis function were also listed out.In addition, system debugging process and result of electric meter data collector software were briefly introduced, and some suggestions on further improvement on this system software were proposed.