Quantum technology based alternating-current differential measurement system and method

Abstract

The invention provides a quantum technology based alternating-current differential measurement system and method and belongs to the field of metering. The system comprises a bias-voltage generation unit, a PJVS, a tested system and conversion unit, a clock source, a first sampling unit, a second sampling unit, an FPGA (field programmable gate array) control unit and a PC upper machine; the clock resource is connected with the bias-voltage generation unit, the tested system and conversion unit and the FPGA control unit respectively and provides time-base frequency for the bias-voltage generation unit, the tested system and conversion unit and the FPGA control unit; the bias-voltage generation unit generates bias current for the PJVS and drives the PJVS to output needed waveforms; the bias-voltage generation unit provides trigger signals for the FPGA control unit; the PJVS is connected with the first sampling unit and the second sampling unit respectively; the tested system and conversion unit is connected with the first and second sampling units respectively; the FPGA control unit is connected with the first and second sampling units and the PC upper machine respectively.

Description

technical field [0001] The invention belongs to the field of metering, and in particular relates to an AC power differential measurement system and method based on quantum technology. Background technique [0002] In the establishment of the AC power reference, the thermocouple is currently used in China. First, the value is transferred from the DC quantum voltage reference to the DC voltage physical standard. After the AC power is directly compared with the DC power through the AC-DC conversion device, the source is traced to the DC power. Voltage physical standard, so as to realize the traceability of AC power to DC quantum voltage. Due to the long traceability path, thermoelectric transducers, as physical standards, are easily affected by the external environment and may change with time and environmental changes, thus bringing a lot of uncertainties to the traceability process. The power frequency quantum power reference is established on the basis of natural constants,...

AI Technical Summary

Problems solved by technology

Due to the long traceability path, thermoelectric transducers, as physical standards, are easily affected by the external environment and may change with time and environmental changes, thus bringing a lot of uncertainties to the traceability process

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