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Instruments and Systems: Monitoring, Control, and Diagnostics

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Assessment of the suppression ratios of network and pulse noise in digital voltmeters
V.G. GALALU, S.A. KIRAKOSIAN

There are the results of digital simulation in NI LabVIEW the sustainability decades with different weighting factors to the effects of
impulse noise and normal noise for digital voltmeters bitwise encoding. The choice the best of the decade and the study of cancellation noise and industrial noise using the eight best decades has this article. The ratios of cancellation of impulse noise for positive and negative noise are significantly different. It is shown that the arithmetic mean of the repeated measurements of the unknown DC voltage with superimposed noise close to the actual value of the measured quantity. If the integral action time is 100 ms, that sinusoidal noise is suppressed to 100 dB, and impulse noise is suppressed from 50 to 60 dB. Since a most of the technological processes are relatively slow, the method of digital filtering (averaging) of 50–100 measurements can significantly improve the accuracy of measurement of physical quantities.
Keywords: noise stability, impulse noise, noise, set of weight coefficients, Fibonacci code, digital filtering.

Contacts: E-mail: asni@fep.tti.sfedu.ru

Pp. 11-18.

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