Three phase electric energy meter based on C8051F310SOC single-chip

Abstract

The invention relates to a three-phase electric energy meter based on a C8051F310SOC single chip. The electric energy meter comprises a central processor, a clock module, a storage module, a 485 communication module, an external key, an AD acquisition module, a voltage comparator module and a power supply feed circuit; the electric energy meter takes C8051F310 as the central processor of a system, and a display part is connected with a master control chip through a SPT interface to perform SPI communication; the clock module is PCF8563, 8 pins thereof are in dual in-line package, and the clock module is connected with the master control chip; a storage module is AT24C16, 8 pins thereof are in dual in-line package, and the storage module shares an IIC bus with a clock chip PCF8563; a central chip of the 485 communication module is MAX485E, 8 pins thereof are in dual in-line package, and the 485 communication module is connected with an upper computer and is responsible for network communication with the upper computer; the external key is connected to a pin of a master control chip P3.4; the AD acquisition module mainly comprises a sensor, a signal conditioning module and ADC in a C8051F310 sheet; and the voltage comparator module is connected to a comparator input pin inside the master control chip. The electric energy meter has the advantages of high metering precision, low cost, simplicity, reliability and so on, and the meter energy meter has extremely strong reconfigurability, and is particularly suitable for popularization in civil electric meters.

Description

technical field [0001] The invention relates to a three-phase electric energy meter based on a C8051F310SOC single chip, belonging to the technical field of electric energy meters. Background technique [0002] After the transformation of urban and rural power grids in 2003, the demand for three-phase multi-function meters in the power system increased rapidly. As a result, international and domestic electric meter companies are optimistic about business opportunities, pay close attention to the development of new technologies, and continuously introduce new products of three-phase multi-function meters to meet the application needs of the electric energy meter market. According to incomplete statistics, the State Grid and China Southern Power Grid have a total of 195 million billing electric energy meters. Among them, the two networks directly manage 118 million units for billing, and indirectly manage 77 million units for billing. [0003] In recent years, the domestic d...

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Problems solved by technology

Among them, changes to the hardware design scheme may have a great impact on the safety and reliability of the product, and at the same time bring more investment and inconvenience to the design and manufacturer

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