Reliable data storage type multifunctional electric meter

Abstract

The invention belongs to the technical field of measurement of electrical energy, and relates to a high reliable data storage type multifunctional electric meter. As for the reliable data storage type multifunctional electric meter, a master control CPU (central processing unit) is provided with five asynchronous transceiving serial ports, wherein a power line carrier communication module, a GPRS (general packet radio service) wireless communication module, an infrared communication module, a first 485 communication path and a second 485 communication path are in electric information connection with corresponding serial ports of the master CPU respectively; a power module is electrically connected with the power input ends of all electric unit modules respectively so as to supply power for all the modules; a three-phase voltage is connected with a voltage transformer, the outputs of the voltage transformer or a current transformer are sampled through a resistor and then connected with a voltage or current circuit differential input sampling pin of a special three-phase electric energy measuring ASIC (application specific integrated circuit); the special three-phase electric energy measuring ASIC is arranged among the master control CPU, the voltage transformer and the current transformer; and a low-power-consumption character field code liquid crystal display is in electric information connection with the master control CPU. The reliable data storage type multifunctional electric meter has a multi-chip backup storage structure, a reliable structural principle, low cost, good data storage safety, high capacity and small volume.

Description

Technical field: [0001] The invention belongs to the technical field of electrical energy measurement, and relates to a reliable data storage system and its equipment, which are used in industrial environments with strict requirements on the data storage system, in particular to a high-reliability data storage multifunctional electric meter. Background technique: [0002] At present, with the implementation of the DL / T6452007 multi-functional electric energy meter communication protocol, the data recorded by the electric energy meter will become very large, and the reliability requirements of the electric power company for the data stored in the electric meter will also be greatly improved. Due to the stringent requirements of power consumption and other aspects, and considering the security and reliability of data storage, the energy meter cannot use large-capacity memory such as Nand Flash, because there are bad blocks in Nand Flash, and the number of bad blocks is not Det...

AI Technical Summary

Problems solved by technology

In addition, the software also needs to ensure the scalability and portability of the storage, and the replacement of the storage will not lead to a large-scale modification and upgrade of the storage system, which will greatly increase the difficulty of software maintenance and testing.

To sum up, the existing electric energy meter technology generally has the disadvantages of complex structure, simple function, small data storage capacity, poor reliability, low accuracy of electric energy measurement, poor safety performance, high cost of use, large energy consumption and bulky volume.

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