Title :
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
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;
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
DOI :
10.1109/CPEM.2008.4574816
