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With the development of urban modernization , the rise of large residential areas , so that the construction of the city's increasing size of management has become even more complex and onerous for the original manual meter reading has been incapable of work now , the new meter reading system , such as handheld machine meter reading system , remote meter reading system emerged. With the development of mobile communications and computer technology , making the modern network communication technologies , such as GPRS , CDMA , GSM, applied to the remote meter reading system has become possible . In order to adapt to the needs of the network , in electric meter transformation or developed , magnetic card meters meters of various types of electric card meter , IC card meter , fully electronic meter, watt-hour meter with communication interface . Watt-hour meter with communication interface with its fast and simple meter reading without manual door meter reading, accurate energy metering , etc. into the direction of the development of a new generation of electric meter . This study is such a watt-hour meter with communication interface , energy monitoring collection terminal . This paper first introduces the current domestic electricity utility metering, the status of the industry and technology , followed by a detailed technical analysis of the acquisition and calibration of the meter charge , especially in order to ensure the accuracy of the metering and measuring the stability of the proposed three - phase energy meter optimization calculation method to determine the energy meter collection, design principles, procedures and methods of computation and transmission . To ensure the accuracy of energy acquisition and measurement , the system selected Microchip's PIC MCU , and also to choose a high-precision metering chip ATT7022B three phase energy acquisition . In order to ensure that the data collected by the system when power is lost , the system also uses advanced data stored - FRAM . The system also has developed a handheld PDA meter reading function , can be used infrared handheld meter reading . The final test results show that the active measurement to meet 0.5S/0.2S, supports IEC 687 /1036 , GB/T17883-1999 reactive measure to meet the two , three , support IEC 1268 , GB / T 17882-1999 : and hourly metering , maximum demand metering and prepaid metering can be anti-tampering ; and a variety of communication methods , such as infrared communication , RS232 , RS485 , etc. , and to meet the GB the communication protocol DLT645 and IrDA1.0 .
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