| Zugriffsnummer | 29971 |
| Dokumenttyp | Dissertation |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Dynamic-weighing calibration for liquid flowmeters: a new approach |
| Autor(in); Institution |
Aguilera, Jesus; 1.5, Flüssigkeiten, PTB-Braunschweig
|
| Quelle/Jahr | (2012), 147 S. |
| Dissertationsvermerk | Dissertation, Technische Universität Ilmenau, 2012 |
| URL | |
| Zusammenfassung | The aim of this dissertation is to describe the first steps made towards the realization of a new calibration method for liquid flowmeters. Such a research work carried out at the liquid flow department of the Physikalisch-Technische Bundesanstalt consists in a dynamic weighing approach, which enables to estimate the mass flow rate several times understationary and quasi-steady conditions, and thus shortening the calibration time. The latter statement represents a significant benefit for flow calibration laboratories, which seek to reduce their calibration costs,energy consumption, and workload.The proposed calibration method relies on a thorough analysis of the interaction between the acting flow-induced forces present in the measurement process, and the dynamics of the weighing system. Then, a series of signal processing techniques based on such ananalysis are implemented, in order to attenuate the magnitude of the undesired flow-induced forces as well as the embedded measurement noise from the system's output signal, so that the measurand can be determined as a time-varying state variable.The effectiveness of this new flowmeter calibration method is validated by a series of numerical and experimental tests, in which according to their results, it reveals that an accuracy level smaller than 0,1% is attainable by applying the proposed method. Furthermore, this document offers a guideline of how to improve in future the performance of the proposed measurement principle. |
