Smart Ic Card Electrical Energy Measurement And Control System

Reference to correlative products abroad and home, this paper puts forward with a kind of new scheme of electric energy measurement and control system which adopts master/slave structure to realize centralized measurement , control and management of electric energy.This paper detailed analyzes design principle and realization of electric energy measurement and control part which includes user controller, sub-user controller and electric energy measurement. Being master control part, user controller stores, manages, display and query user information; as slave control part, sub-user controller calculates and temporarily stores power sent from measuring module; measuring module measures electric energy by using power meter's special circuit which simplifies circuit design and connects or breaks up power supply circuit by relay; in order to transmitting data fast and exactly, RS-485 communication standard is adopts between user controller and sub-user controller. At the same time, it briefly introduces the design of IC card read/write device and the communication protocol between computer and IC card read/write device.This paper detailed introduces the character selection and encryption of IC card and implements read-write and encryption of IC card. The Windows interface is shown in software using serial communication control to realize serial communication. Friendly user interface, fresh menu window and strong control function are also provided to user.This system has passed the appraisal of 1.0 lever power meter made by Dalian Weighhouse, its precision and reliability fits the need of power meter, thus it is a kind of electric energy measurement and control system which can easily use and should be popularized.