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Pre-calibrated electric energy metering circuit and calibration method

A technology of electric energy measurement and circuit, applied in the direction of measuring electric variables, measuring devices, instruments, etc., can solve the problems of high cost and incompatibility with peripheral circuits, etc., and achieve the effect of reducing the cost of meter calibration, improving measurement accuracy, and simple calibration structure

Active Publication Date: 2015-12-02
CRM ICBG (WUXI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for metering circuits without communication interfaces, it is often necessary to design modules such as calibration register circuits, communication interface circuits, and digital signal operation circuits, adding communication pins, which cannot be compatible with the original peripheral circuits, and the PCB board must be redesigned, which is costly

Method used

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  • Pre-calibrated electric energy metering circuit and calibration method
  • Pre-calibrated electric energy metering circuit and calibration method
  • Pre-calibrated electric energy metering circuit and calibration method

Examples

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Embodiment Construction

[0031] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] figure 2 It is a circuit structure block diagram of a preferred embodiment of a pre-calibration electric energy metering circuit of the present invention. Such as figure 2 As shown, a pre-calibrated electric energy metering circuit of the present invention includes at least a sampling module 201, an analog-to-digital conversion module 202, a digital signal processing module 203, a...

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PUM

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Abstract

The invention discloses a pre-calibrated electric energy metering circuit and a calibration method. The pre-calibrated electric energy metering circuit and the calibration method which at least comprise a sampling module, an analog to digital conversion module, a digital signal processing module, a calibration register, an interface module and a calibration module, wherein the calibration register receives calibration data written in by a calibration control console through an interface to control a working state of the calibration module, and the calibration module controls the working state according to the set of the calibration register, and adjusts the transfer function of the modulator of the analog to digital conversion module. The pre-calibrated electric energy metering circuit and the calibration method can realize electric energy metering precision pre-calibration of an electric energy meter, simultaneously is compatible with peripheral circuits of an original electronic electric energy meter and a printed circuit board (PCB) is unnecessary to design afresh.

Description

technical field [0001] The invention relates to the field of metering chips, in particular to a pre-calibrated electric energy metering circuit and a calibration method applied to electric energy metering circuits. Background technique [0002] figure 1 It is a structural schematic diagram of an existing electrical energy metering circuit without a calibration function. Such as figure 1 As shown, the energy metering circuit without calibration function includes a sampling module, an analog-to-digital conversion module, a digital signal processing module, a reference module, and a clock frequency conversion module. The sampling module samples the current signal and voltage signal and sends it to the analog-to-digital conversion module for Analog-to-digital conversion, the converted current digital quantity and voltage digital quantity are sent to the digital signal processing module for processing to generate measurement parameters. [0003] However, after figure 1 The me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R22/10G01R35/04
Inventor 胡燕陈富涛罗先才严淼尤剑源张蓉
Owner CRM ICBG (WUXI) CO LTD
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