Voltage and current precision metering device and precision metering method based on satellite navigation system

Abstract

The invention discloses a precise voltage and current metering device and method based on a satellite navigation system. The metering device comprises a processing module, a satellite timing service module, a voltage-frequency converter and a current-frequency converter. The input end of the voltage-frequency converter is connected with a voltage signal to be detected; the output end of the voltage-frequency converter is connected with the processing module; the input end of the current-frequency converter is connected with a current signal to be detected; the output end of the current-frequency converter is connected with the processing module; the satellite timing service module provides a clock reference for the voltage-frequency converter, the current-frequency converter and the processing module. A clock signal is extracted from the satellite navigation system to serve as a voltage and current measurement reference clock, precise voltage and current metering is achieved under the conditions of various places, various temperatures and various degrees of humidity, the metering device does not need to be regularly sent to a metering identification institution for verification, and the problems caused by traditional value traceability and value transfer modes are well solved.

Description

technical field [0001] The invention relates to the field of precision measurement of signals, in particular to a voltage and current precision measurement device and a precision measurement method based on a satellite navigation system. Background technique [0002] Currently, AC and DC voltage signals are measured using voltage measuring instruments that have passed periodic verification. This kind of voltage measuring instrument needs to be sent to the metrological verification institution for verification within a certain period of time in accordance with the requirements of the national verification regulations, so as to ensure the accuracy and reliability of the voltage measuring instrument. [0003] The purpose of regularly sending to the metrology verification institution for verification is: the transfer of the value, that is, the traceability of the value. Make all measuring instruments have a unified standard. However, this method of traceability to the source o...

AI Technical Summary

Problems solved by technology

In the process of this graded value transmission, the possible problems are: in the process of each level of value transmission, certain errors may occur. Due to the accumulation of value errors, it will inevitably lead to the measurement accuracy of the lowest level of measurement and verification institutions. degree is not high

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