Methods of measurement signal acquisition from the rotational flow meter for frequency analysis

Dariusz Świsulski; Robert Hanus; Marcin Zych; Leszek Petryka

doi:10.1051/epjconf/201714302124

Methods of measurement signal acquisition from the rotational flow meter for frequency analysis

Abstract

One of the simplest and commonly used instruments for measuring the flow of homogeneous substances is the rotational flow meter. The main part of such a device is a rotor (vane or screw) rotating at a speed which is the function of the fluid or gas flow rate. A pulse signal with a frequency proportional to the speed of the rotor is obtained at the sensor output. For measurements in dynamic conditions, a variable interval between pulses prohibits the analysis of the measuring signal. Therefore, the authors of the article developed a method involving the determination of measured values on the basis of the last inter-pulse interval preceding the moment designated by the timing generator. For larger changes of the measured value at a predetermined time, the value can be determined by means of extrapolation of the two adjacent interpulse ranges, assuming a linear change in the flow. The proposed methods allow analysis which requires constant spacing between measurements, allowing for an analysis of the dynamics of changes in the test flow, eg. using a Fourier transform. To present the advantages of these methods simulations of flow measurement were carried out with a DRH-1140 rotor flow meter from the company Kobold.

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Authors (4)

Dariusz Świsulski dr hab. inż.
Robert Hanus
- Politechnika Rzeszowska, Wydział Elektrotechniki i Informatyki
Marcin Zych
- Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie, Wydział Geologii, Geofizyki i Ochrony Środowiska
Leszek Petryka
- Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie, Wydział Fizyki i Informatyki Stosowanej

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Category:: Conference activity
Type:: materiały konferencyjne indeksowane w Web of Science
Published in:: EPJ Web of Conferences no. 143, pages 1 - 6,
ISSN: 2100-014X
Title of issue:: 11th International Conference on Experimental Fluid Mechanics (EFM) strony 1 - 6
ISSN:: 2100-014X
Language:: English
Publication year:: 2017
Bibliographic description:: Świsulski D., Hanus R., Zych M., Petryka L..: Methods of measurement signal acquisition from the rotational flow meter for frequency analysis, W: 11th International Conference on Experimental Fluid Mechanics (EFM), 2017, EDP Sciences,.
DOI:: Digital Object Identifier (open in new tab) 10.1051/epjconf/201714302124
Verified by:: Gdańsk University of Technology