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A DC voltage proportional value traceability measurement system and method

A technology of quantity traceability and DC voltage, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems that the difference measurement method and the voltage ratio method cannot be applied, and achieve the goal of improving accuracy, reducing influence, and eliminating system errors Effect

Active Publication Date: 2020-12-25
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of digital technology, the output signals of many DC voltage proportional devices have changed from analog signals to digital signals conforming to specific regulations. The comparison method cannot be applied

Method used

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  • A DC voltage proportional value traceability measurement system and method
  • A DC voltage proportional value traceability measurement system and method
  • A DC voltage proportional value traceability measurement system and method

Examples

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0041] Such as figure 1 As shown, a DC voltage proportional value traceability measurement system includes a standard device, a test product, a signal input port, an impedance matching module, a channel alternate conversion module, a protocol analysis module, a timing control module and a host computer system;

[0042] The signal input port includes the analog port of the standard device, the analog port of the tested product and the digital port of the tested product, respectively marked as A1, A2 and D; the tested product is provided with an analog output port or a digital output port, and the analog port of the standard device is The input terminal is connected to the output te...

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Abstract

The invention discloses a direct-current voltage proportional magnitude traceability measuring system and method. The system comprises a standard device, a tested product, signal input ports, an impedance matching module, a channel alternating conversion module, a protocol analysis module, a time sequence control module and a host computer system. The signal input ports include a standard analog port, a tested product analog port, and a tested product digital port; output ends of the signal input ports are connected with the channel alternating conversion module; the protocol analysis module,the channel alternating conversion module, and the time sequence control module are connected with the host computer system; and the impedance matching module is arranged between the host computer system and the signal input ports. The channel alternating conversion module includes a plurality of measuring channel groups. In addition, the invention also discloses a traceability measuring method. According to the invention, the magnitude traceability demands of the analog-quantity and digital-quantity direct-current voltage proportional devices can be satisfied; the influences on the traceability results by the input impedance and the measurement channel system error are reduced effectively; and thus the traceability measurement accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of DC voltage measurement, in particular to a DC voltage proportional value traceability measurement system and method. Background technique [0002] The DC voltage proportional device is a necessary equipment for DC high voltage measurement. It converts DC high voltage into DC low voltage according to a certain ratio. The accuracy of its value determines the accuracy of DC high voltage measurement. For traceability measurement, when the existing DC voltage ratio value is traced back, the difference measurement method and the voltage ratio method are generally used. [0003] The difference measurement method is to trace the value of the tested product to the standard device by measuring the voltage at both ends of the difference bridge arm between the standard device and the tested product, which can be divided into compensation method and difference method. The compensation method is to connect the compens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 李登云岳长喜朱凯熊魁李智成刘洋
Owner CHINA ELECTRIC POWER RES INST
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