A device for measuring electricity consumption

Abstract

The invention discloses a power consumption metering device which comprises a metering chip, wherein the metering chip comprises a pulse output unit, a digital signal processing unit, an SPI (Serial Peripheral Interface) communication interface, a check correction processing unit with a redundancy correction function, a parameter storage unit with a power failure storage function, a metering pulse storage unit and a parameter change event record book, wherein the SPI communication interface is connected with the check correction processing unit; the parameter storage unit is connected with the check correction processing unit and the digital signal processing unit; the metering pulse storage unit is connected with the pulse output unit of the metering chip and the check correction processing unit, and used for storing accumulated pulses in real time; the parameter change event record book is used for recording an event when a metering parameter is changed. According to the device, the metering accuracy and reliability can be improved and the running state can be judged.

Description

technical field [0001] The invention relates to a power consumption metering device. Background technique [0002] The current power consumption metering devices all use electric energy metering chips, and the electric energy metering chips all use software calibration methods, but the registers of the metering chips are not saved when the power is off. Once reset, the default parameters will be used, resulting in inaccurate metering, until the MCU refreshes these Registers can restore normal metering, so the accuracy and reliability of electricity metering are difficult to be guaranteed. At the same time, it is also difficult for the existing power consumption metering device to effectively judge whether its own operation is normal. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the existing electricity consumption metering device, the present invention provides an electricity consumption metering device that can improve measu...

AI Technical Summary

Problems solved by technology

[0002] The current power consumption metering devices all use electric energy metering chips, and the electric energy metering chips all use software calibration methods, but the registers of the metering chips are not saved when the power is off. Once reset, the default parameters will be used, resulting in inaccurate metering, until the MCU refreshes these Registers can restore normal metering, so the accuracy and reliability of power consumption metering are difficult to guarantee

At the same time, the existing power consumption metering device is also difficult to effectively judge whether its own operation is normal or not.

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