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DC energy meter calibration method and system

A technology for DC energy meter and meter calibration, applied in the field of power supply, can solve the problems of accuracy and long time consumption

Active Publication Date: 2016-03-23
SHENZHEN CLOU ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This calibration method requires a large amount of experimental data to estimate a possible DC offset and gain, and requires the operator to have certain experience to perform
Moreover, the calibration result can only be achieved in an approximate way, and it cannot be theoretically determined that the result is 100% accurate and takes a long time

Method used

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  • DC energy meter calibration method and system
  • DC energy meter calibration method and system
  • DC energy meter calibration method and system

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] As a measurement tool for real-time variables such as voltage, current, and power, the DC watt-hour meter needs to have high accuracy in its measurement data. Therefore, the present invention provides a DC electric energy meter, which is conducive to improving the accuracy in the calibration process, thereby ensuring that the calibrated DC electric energy meter has high measurement accuracy. The DC electric energy meter in an embodiment includes a printed circuit board. A control circuit is arranged on the printed circuit board. The control circuit includes a voltage sampling circuit, a cu...

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Abstract

The present invention relates to a DC energy meter calibration method. The method comprises a step of calibrating a DC offset value and a step of calibrating a gain and also comprises a step of calculating a voltage gain according to a first voltage value, a voltage original value and a second voltage value and calculating a current gain according to a first current value, a current original value and a second current value, and a step of sending a DC voltage offset value, a current offset value, the voltage gain and the current gain to a DC energy meter to complete the calibration of the DC energy meter. The DC energy meter calibration method has the advantages of high calibration precision and short calibration time. The invention also relates to a DC energy meter calibration system.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a calibration method for a DC ammeter, and also to a calibration system for a DC electric energy meter. Background technique [0002] The DC watt-hour meter needs to accurately measure real-time variables such as voltage, current and power in real time, and can correctly accumulate electric energy. The calibration process of the DC energy meter is generally to calibrate the DC offset (DCoffset) and gain (Gain) of the voltage and current. Wherein, the DC offset represents the offset calibration value of the DC noise in the metering module of the DC electric energy meter; the gain represents the conversion multiple of the analog signal. [0003] The traditional calibration method of DC electric energy meter mostly adopts empirical approximation method. The empirical approximation method is usually to artificially estimate a possible DC offset and gain, and directly write i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 潘晓亮
Owner SHENZHEN CLOU ELECTRONICS
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