Studies on AC voltage measurement by sampling method

Author

Yue, Liu ; Xiuzeng, Zhang ; Honggang, Zhao ; Benxia, Zou

Author_Institution

Div. of Electr. & Quantum Metrol., Nat. Inst. of Metrol., Beijing

fYear

2008

fDate

8-13 June 2008

Firstpage

388

Lastpage

389

Abstract

Digital sampling measuring system was developed at NIM. AC signals under test were transmitted into the input of AD converter by voltage follower. Under the control of MCU, AD converter synchronously sampled the signal by full period, and the sampling data was transmitted by photo-coupler and calculated by computer. The sampling results compared with the measurement results of FLUKE 5790A. The agreements were within 2 times 10^-5. It was found that the dominating part of the uncertainty in the system is the Integral Nonlinearity (INL) of AD converter, and the influence of quantization error can be decreased by increasing the sampling frequency.

Keywords

analogue-digital conversion; measurement systems; measurement uncertainty; operational amplifiers; quantisation (signal); signal sampling; voltage measurement; AC voltage measurement; AD converter; FLUKE 5790A; MCU control; digital sampling measuring system; integral nonlinearity; measurement uncertainty; photo-coupler; quantization error; synchronous signal sampling; voltage follower; Analog circuits; Circuit testing; Electric variables measurement; Equations; Frequency conversion; Mathematical model; Metrology; Quantization; Sampling methods; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on

Conference_Location

Broomfield, CO

Print_ISBN

978-1-4244-2399-6

Electronic_ISBN

978-1-4244-2400-9

Type

conf

DOI

10.1109/CPEM.2008.4574816

Filename

4574816