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Electric energy meter calibration method, device and equipment

A calibration method and technology for electric energy meters, which can be used in measuring devices, measuring electrical variables, instruments, etc., and can solve problems such as low accuracy

Active Publication Date: 2019-03-01
WAHLAP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a method, device and equipment for calibrating electric energy meters to solve the technical problem of low accuracy of existing electric energy meter calibration existing in the prior art

Method used

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  • Electric energy meter calibration method, device and equipment
  • Electric energy meter calibration method, device and equipment
  • Electric energy meter calibration method, device and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An embodiment of the present invention provides a method for calibrating an electric energy meter, such as figure 1 As shown, the method includes:

[0029] In step S102, the initial effective current value of the electric energy meter to be calibrated is obtained, and the initial effective current value is squared to obtain the induced current calibration value.

[0030] Specifically, the initial effective current value of the electric energy meter to be tested is read by the upper computer software of the electric energy meter. It is calculated by the following formula,

[0031]

[0032] Among them, i n Is the sampling value of the metering chip; N is the number of sampling points; I rms It is the RMS value of the metering chip current. Then calculate the square of the initial current effective value to obtain the induced current value for calibrating the energy meter.

[0033] Step S104, using the working circuit connected to the electric energy meter to be ca...

Embodiment 2

[0045] The embodiment of the present invention provides another kind of energy meter calibration method, such as figure 2 As shown, the method includes:

[0046] Step S202, using the electric energy meter detection device to provide voltage to the electric energy meter to be calibrated. The detection device of the electric energy meter only provides voltage but not current for the electric energy meter to be detected, so as to ensure that the initial effective current value in the electric energy meter to be detected is accurate, wherein the voltage value provided by the electric energy meter detection device is 220V.

[0047] Step S204, using the meter calibration tool to read the initial effective current value of the metering chip set in the electric energy meter to be calibrated, and use the initial effective current value as the initial effective current value of the electric energy meter to be calibrated. Among them, the meter calibration tool is the meter calibration ...

Embodiment 3

[0060] An embodiment of the present invention provides an electric energy meter calibration device, such as image 3 As shown, the device includes: a first calculation module 31 , a first acquisition module 32 , a second calculation module 33 , a third calculation module 34 , a second acquisition module 35 , a judgment module 36 and a determination module 37 .

[0061] Specifically, the first calculation module 31 is used to obtain an initial effective current value of the electric energy meter to be calibrated, and square the initial effective current value to obtain a calibration value of the induced current. Wherein, the first calculation module is also used for: using the electric energy meter detection device to provide voltage to the electric energy meter to be calibrated; reading the initial effective current value of the metering chip arranged in the electric energy meter to be calibrated through the meter calibration tool, and calculating the initial effective current ...

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Abstract

The invention provides an electric energy meter calibration method, device and equipment. The method comprises steps: the initial effective current value of a to-be-calibrated electric energy meter isacquired, the initial effective current value is subjected to square calculation, and an induction current calibration value is obtained; the actual effective current value of the to-be-calibrated electric energy meter is acquired by using a working circuit connected with the to-be-calibrated electric energy meter; the actual effective current value is subjected to square calculation, and an effective current squared value is obtained; subtraction between the effective current squared value and the induction current calibration value is carried out to obtain a subtraction result, the subtraction result is subjected to square root calculation, and a calibration current value is obtained; if the calibration current value is larger than zero, the fundamental current effective value of the to-be-calibrated electric energy meter is acquired; and whether the fundamental current effective value is smaller than the starting current value of the to-be-calibrated electric energy meter is judged, and if yes, the calibration current value is determined to be zero. The technical problem of inaccurate calibration of the existing electric energy meter is solved, the electric energy meter calibration accuracy is improved, and the experience degree of a user is improved.

Description

technical field [0001] The invention relates to the technical field of meters and instruments, in particular to a method, device and equipment for calibrating an electric energy meter. Background technique [0002] When the user does not use the electrical device, he often finds that the current value displayed on the energy meter is not the current value used by the user, but the abnormal sampling of the energy meter caused by the internal interference of the energy meter or external crosstalk. . [0003] The existing technology realizes the calibration of the electric energy meter by calibrating the offset register of the metering chip during production. Usually, the electric energy meter has two chips, one is a metering chip, and the other is a main processing chip. The metering chip is responsible for voltage and current sampling. , the main processing chip is responsible for obtaining data from the metering chip and performing secondary processing to obtain the process...

Claims

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Application Information

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IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 潘玉刚李家成姚徐旭顾小峰
Owner WAHLAP TECH CO LTD
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