Title :
Influence of sample aperture on evaluating harmonics of periodic signals using sampling method
Author :
Leibing Shi ; Jian Feng ; Bihong Zhou ; Lei Lai
Author_Institution :
Shanghai Inst. of Meas. & Testing Technol., Shanghai, China
Abstract :
The inherent relationship among frequency of measured signal, aperture time and attenuation of ADC has been revealed through theoretical analysis. A kind of attenuation measurement system which compares the results of asynchronous sampling method and AC/DC transfer method based on thermoelectric conversion is built to verify the relationship. Attenuation is compensated and the consistency between two methods is within 20μV up to 60th harmonic with the fundamental voltage of 0.5V, 50Hz.
Keywords :
analogue-digital conversion; attenuation measurement; harmonics; signal sampling; thermoelectric conversion; time measurement; AC-DC transfer method; ADC; aperture time measurement; asynchronous sampling method; attenuation measurement system; compensation; frequency 50 Hz; harmonics evaluation; periodic signal sampling method; signal measurement; thermoelectric conversion; voltage 20 muV to 0.5 V; Accuracy; Apertures; Attenuation; Attenuation measurement; Frequency measurement; Harmonic analysis; Sampling methods; ADC; Asynchronous sampling; compensation; harmonic voltage; sample aperture;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898380
