FAST AND ACCURATE MEASUREMENT OF THE RMS VALUE OF A NONCOHERENT SAMPLED SINE WAVE

Daniel Belega, Dominique Dallet

Abstract

In this paper a new estimator for the measurement of the rms value of a noncoherent sampled sine-wave is proposed. The key feature of this estimator is that the sine-wave offset, <i>a priori</i> estimated, is removed from the sine-wave. A formula used to estimate the sine-wave offset is also given in the paper. It has been proved by means of computer simulations and experimental results that by the proposed estimator accurate rms measurements are obtained if the total harmonic distortion (THD) of the sine-wave is smaller than or equal to -30 dB.

Keywords

sine-wave rms estimation, noncoherent sampling mode, windowing

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IMEKO-WC-2009-TC4-284.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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