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Direct-current voltage proportional magnitude traceability measuring 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: 2019-04-30
CHINA ELECTRIC POWER RES INST +1
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  • Description
  • Claims
  • Application Information

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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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  • Direct-current voltage proportional magnitude traceability measuring system and method
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  • Direct-current voltage proportional magnitude traceability measuring system and method

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Embodiment Construction

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention, but the examples cited 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 ports include the standard device analog port, the tested product analog port and the tested product digital port, which are respectively marked as A1, A2 and D; the tested product is equipped with an analog output port or a digital output port. The input terminal is connected with the output terminal of the standard instrument, the input terminal of the anal...

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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 system and method for traceability measurement of the proportional value of DC voltage. Background technique [0002] The DC voltage proportional device is the 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, and its value is generally required. For traceability measurement, when the existing DC voltage proportional value traceability, the difference measurement method and the voltage ratio method are generally used. [0003] The difference measurement method is to measure the voltage between the two ends of the difference bridge arm between the standard device and the tested product, and trace the value of the tested product to the standard device. It can be divided into compensation method and difference me...

Claims

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Application Information

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Patent Type & Authority Applications(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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