Noninvasive magnetic-marking-based flow metering with optically pumped magnetometers
Abstract: We present a noninvasive procedure that measures the flow velocity of a fluid by using polarized hydrogen nuclei in the fluid. The measurement procedure is based on a time-of-flight method where magnetic information is applied on the fluid with a permanent magnet and an RF-pulse. In contrast to other methods, this magnetic-marking method works without tracers. The read-out of the magnetic information is performed by optically pumped magnetometers downstream. In order to function, the magnetometers have to be operated in a magnetic shield with magnetic field strengths lower than 100 nT, i.e., in the zero-to-ultra-low-field regime. In this regime, the magnetometers are capable of detecting induced magnetic signals of 10 pT or less with an inline-flow setup. The results presented in this paper demonstrate the viability of optically pumped magnetometers for flow metering. The first metering results yielded an average accuracy of 3% at flow velocities between 13 cm/s and 22.4 cm/s
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Anmerkungen
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Applied sciences. - 12, 3 (2022) , 1275, ISSN: 2076-3417
- Ereignis
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Veröffentlichung
- (wo)
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Freiburg
- (wer)
-
Universität
- (wann)
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2022
- Urheber
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Schmieder, Leonhard
Koss, Peter A.
Lambrecht, Armin
Kühnemann, Frank
- DOI
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10.3390/app12031275
- URN
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urn:nbn:de:bsz:25-freidok-2255814
- Rechteinformation
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Kein Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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25.03.2025, 13:53 MEZ
Datenpartner
Deutsche Nationalbibliothek. Bei Fragen zum Objekt wenden Sie sich bitte an den Datenpartner.
Beteiligte
- Schmieder, Leonhard
- Koss, Peter A.
- Lambrecht, Armin
- Kühnemann, Frank
- Universität
Entstanden
- 2022
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