Electric quantity data storage method for electric energy meter

A technology of electricity data and electric energy meter, which is applied in the direction of measuring electric variables, measuring devices, instruments, etc., can solve the problems of data loss, unstable level, inaccurate measurement, etc., and achieve reliable storage, prevent loss, and ensure accuracy Effect

Active Publication Date: 2016-02-17
NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are the following problems in the above-mentioned existing energy data storage method of the electric energy meter: only when the electric energy meter is powered on, the calculated check code is compared with the initial check code pre-stored in the non-volatile memory, and when the electric energy meter During the operation, only the power data is accumulated, and the check code is not calculated for the power data. The check code is only updated when the power is turned off. In this way, although the power is turned on and off normally, the calculated check code can be guaranteed to be equal to that stored in the non-volatile memory in

Method used

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  • Electric quantity data storage method for electric energy meter

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Embodiment

[0029] Such as figure 1 Shown is a method for storing electricity data of an electric energy meter. The electric energy meter includes an MCU, a metering chip and a nonvolatile memory, and both the metering chip and the nonvolatile memory are electrically connected to the MCU.

[0030](1) The energy meter is powered on, the MCU starts timing, and automatically sets the initial value of the first power data A1 stored in the RAM memory of the MCU, the initial value of the first check code B1, the preset count value C, and the preset value The number of storage times D, the preset backup time E, and the accumulated power value △A automatically set the initial value of the second power data A2 and the initial value of the second check code B2 stored in the first storage area of ​​the non-volatile memory. value, and the initial value of the third power data A3 and the initial value of the third check code B3 in the second storage area of ​​the non-volatile memory; in this example, ...

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Abstract

The invention relates to an electric quantity data storage method for an electric energy meter. The method is characterized by comparing a check code obtained through calculation with an initial check code pre-stored in a nonvolatile memory when the electric energy meter is energized; and when the electric energy meter is not energized, verifying and storing the current electric quantity data, and performing accumulative updating for the electric quantity data during the operation process of the electric energy meter, and also verifying the electric quantity data during every process for storing the updated electric quantity data, thus guaranteeing the accuracy of the electric quantity data. Besides, the electric quantity data storage method also utilizes the nonvolatile memory to store and back up the electric quantity data at regular intervals, thus preventing loss of data and being more reliable in storage.

Description

technical field [0001] The invention relates to the technical field of electric energy metering, in particular to a method for storing electric quantity data of an electric energy meter. Background technique [0002] The energy meter includes an MCU and a metering chip. The MCU obtains power data through the metering chip. In order to ensure that the power data is not lost, the power meter usually needs a non-volatile memory to store the power data. The existing power data storage method of the power meter is in the above When powering on, the MCU reads the current power data in its own RAM memory, calculates the check code based on the current power data, and compares whether the calculated check code is consistent with the initial check code stored in the non-volatile memory in advance. , it means that the energy meter is working normally. If it is not consistent, the power data will be restored from the non-volatile memory to the RAM memory of the MCU. When the energy me...

Claims

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Application Information

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IPC IPC(8): G01R22/00
CPCG01R22/00
Inventor 郑坚江季上满应必金陈恢云
Owner NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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