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

Robert Hanus; Marcin Zych; Leszek Petryka; Dariusz Świsulski

doi:10.1155/2014/475735

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

Abstract

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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Authors (4)

Robert Hanus
- AGH .
Marcin Zych
- AGH Katedra Geofizyki
Leszek Petryka
- AGH .
Dariusz Świsulski dr hab. inż.

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: MATHEMATICAL PROBLEMS IN ENGINEERING no. 2014, pages 1 - 10,
ISSN: 1024-123X
Language:: English
Publication year:: 2014
Bibliographic description:: 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, (2014), s.1-10
DOI:: Digital Object Identifier (open in new tab) 10.1155/2014/475735
Verified by:: Gdańsk University of Technology