Time Delay Estimation in Two-Phase Flow Investigation Using the γ-Ray Attenuation Technique. - Publikacja - MOST Wiedzy

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Time Delay Estimation in Two-Phase Flow Investigation Using the γ-Ray Attenuation Technique.

Abstrakt

Time delay estimation is an important research question having many applications in a range of technologies. Measurement of a two-phase flow in a pipeline or an open channel using radioisotopes is an example of such application. For instance, the determination of velocity of dispersed phase in that case is based on estimation of the time delay between two stochastic signals provided by scintillation probes. The proper analysis of such signals, usually in presence of noise, requires the use of advanced statistical signal processing. In this paper, the simulation studies of time delay estimation were carried out with the use of the following differential methods: average magnitude difference function, and average square difference function and proposed combined methods comprising the above-mentioned differential and cross-correlation functions are presented. Attached simulations have been carried out for models of stochastic signals corresponding to the signals obtained in gamma-ray absorption measurements of gas-liquid flow in a horizontal pipeline. The standard uncertainties of time delay estimations have been determined for each of the methods. Improved metrological properties have been stated in the combined methods in comparison with the classical cross-correlation procedure.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
MATHEMATICAL PROBLEMS IN ENGINEERING nr 2014, strony 1 - 10,
ISSN: 1024-123X
Język:
angielski
Rok wydania:
2014
Opis bibliograficzny:
Hanus R., Zych M., Petryka L., Świsulski D.: Time Delay Estimation in Two-Phase Flow Investigation Using the γ-Ray Attenuation Technique. // MATHEMATICAL PROBLEMS IN ENGINEERING. -Vol. 2014, nr. ID 475735 (2014), s.1-10
Weryfikacja:
Politechnika Gdańska

wyświetlono 19 razy

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