Design and implementation of differential AC voltage sampling system based on PJVS

Jia, Zhang; Liu, Zhiyao; Wang, Lei; He, Qing; Huang, Hongtao; Liu, Lijuan

doi:10.1016/j.measurement.2018.04.097

Cited by 12 publications

(7 citation statements)

References 15 publications

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“…(1) A discrete Fourier transform algorithm is applied first to get the information on fundamentals and harmonics, and then an average is calculated to get the RMS of the waveform to be measured [15]; this post-processing method is called "DFT-Average" in this paper; (2) An average is calculated first to receive one voltage per step of the waveform to be measured, and then the DFT algorithm is applied to get the information of fundamentals and harmonics of the waveform to be measured [16]; this post-processing method is called "Average-DFT" in this paper; (3) Due to the limitation of the sampling principle of samplers such as integral samplers, an integrated sampling is used first to obtain one voltage per step of the waveform to be measured, and then the DFT algorithm is applied to get the RMS of the waveform to be measured [9,10,12]; this post-processing method is called "Integrate-DFT" in this paper.…”

Section: Phase Jitter Modelmentioning

confidence: 99%

“…The National Institute of Standards and Technology (NIST) experimentally verified the feasibility of AC voltage measurement by the differential sampling method based on PJVS for the first time with two sets of PJVS systems in 2008 [7]. Over the past decade, several national metrology institutions (NMIs) such as PTB [5,8], NIST [7,9,10], Korea Research Institute of Standard and Science (KRISS) [11][12][13], National Institute of Advanced Industrial Science and Technology (AIST) [14,15] and the National Institute of Metrology (NIM) [16] have conducted research on differential sampling systems based on PJVS to measure AC voltages. The process of differential sampling based on PJVS 2 of 13 for AC waveform measurement is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

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Simulation Analysis of Phase Jitter in Differential Sampling of AC Waveforms Based on the Programmable Josephson Voltage Standard

Wang,

Sun,

Zhao

et al. 2024

Electronics

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The effect of phase jitter on differential sampling using the programmable Josephson voltage standard (PJVS) system is studied in this paper. A phase jitter model is established for the measured signal, and compensation coefficients for phase jitter removal are derived for three different post-processing methods based on the discrete Fourier transform algorithm (DFT). Based on our analysis, the phase jitter compensation coefficients are determined by the phase jitter angle distribution and harmonic order. Furthermore, after analyzing and simulating various common distributions, the phase jitter compensation coefficients have been verified. The simulation shows that when the standard deviation of the phase jitter angle is 20 ns, and the frequency of the measuring waveform is 3.46 kHz, the influence of the phase jitter is 1 × 10−7. The results of the simulation indicate that, in the differential sampling of AC waveforms using a PJVS system, phase jitter is one of the error terms for an uncertainty budget that cannot be neglected, particularly as the frequency of the measured waveforms increases.

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Section: Phase Jitter Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation Analysis of Phase Jitter in Differential Sampling of AC Waveforms Based on the Programmable Josephson Voltage Standard

Wang,

Sun,

Zhao

et al. 2024

Electronics

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“…In recent years, differential sampling based on a PJVS as a reference for measuring AC signals has been widely used in national metrology institutions (NMIs) [4][5][6][7]. Using the quantized step of the stepwise approximated waveforms generated by PJVS, the differential sampling method can accurately measure the unknown AC voltage with the transients discarded [8][9][10][11][12][13]. However, the PJVS system requires liquid helium for operation, and AC voltage calibration with it is complex and costly [8].…”

Section: Introductionmentioning

confidence: 99%

Differential Sampling of AC Waveforms Based on a Commercial Digital-to-Analog Converter for Reference

Wang,

Sun,

Zhao

et al. 2024

Sensors

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This paper introduces an innovative differential sampling technique for calibrating AC waveforms, leveraging a commercially available 16-bit digital-to-analog converter (DAC) as the reference standard. The novelty of this approach lies in its enhanced stability over traditional direct sampling methods, especially as the frequency of the AC waveform increases. Notably, this technique provides a cost-effective sampler alternative to the differential sampling methods that rely on a programmable Josephson voltage standard (PJVS). A critical aspect of this methodology is the precise measurement of the DAC’s output voltage, for which a static measurement strategy is adopted to utilize the exceptional linearity and transfer accuracy of the Keysight 3458A (Santa Rosa, CA, USA) in its standard DCV mode. The differential sampling method has demonstrated good accuracy, achieving a near 1 µV/V agreement with a pulse-driven AC Josephson voltage standard (ACJVS) across a 40 Hz to 200 Hz frequency range. The method attained an expanded uncertainty (k = 2) of 1 part in 106 while measuring a 0.707107 VRMS sine wave at 50 Hz, showcasing its efficacy in precise AC waveform calibration.

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“…To date, differential sampling of AC voltages [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] based on a programmable Josephson voltage standard (PJVS) has been mainly performed using an integrating sampler, Keysight 3458A (K3458A) 3 or a Δ-Σ analogue-to-digital converter, * Author to whom any correspondence should be addressed. 3 Disclaimer: certain commercial equipment, instruments, or materials are identified in this paper to adequately specify the environmental and experimental procedures.…”

Section: Introductionmentioning

confidence: 99%

Differential sampling of AC waveforms based on a programmable Josephson voltage standard using a high-precision sampler

Kim¹,

Cho²,

Solve³

2022

Metrologia

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A high-precision sampler, Fluke 8588A multimeter in the sampling mode, was utilised to perform differential sampling of AC waveforms with a programmable Josephson voltage standard. The systematic error on the differential sampling, induced by the inherent voltage-response characteristics and built-in low-pass filter of the sampler, was estimated. Experimental results and numerical simulations revealed that the sampler could be used for reliable differential sampling of AC waveforms at frequencies up to several kilohertz, with an appropriate number of the voltage steps per the waveform period, when the input bandwidth was set to 3 MHz. In addition, the sampler was compared to an integrating sampler, Keysight 3458A, now widely used for differential sampling. At 62.5 Hz, a key frequency in the future on-site key comparison of the differential sampling on AC voltage, the difference in RMS-amplitude values obtained by the differential sampling using the two different samplers is approximately 150 nV/V due to the systematic error caused by the limited bandwidth of 150~kHz for the integrating sampler.

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Design and implementation of differential AC voltage sampling system based on PJVS

Cited by 12 publications

References 15 publications

Simulation Analysis of Phase Jitter in Differential Sampling of AC Waveforms Based on the Programmable Josephson Voltage Standard

Simulation Analysis of Phase Jitter in Differential Sampling of AC Waveforms Based on the Programmable Josephson Voltage Standard

Differential Sampling of AC Waveforms Based on a Commercial Digital-to-Analog Converter for Reference

Differential sampling of AC waveforms based on a programmable Josephson voltage standard using a high-precision sampler

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