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A Novel Approach to Acoustic Liquid Density Measurements Using a Buffer Rod Based Measuring Cell

Bergen Open Research Archive

Show simple item record Bjørndal, Erlend Frøysa, Kjell-Eivind Engeseth, Svein-Atle 2008-10-06T13:58:05Z 2008-10-06T13:58:05Z 2008-08-08 en 2008-08-08
dc.identifier.citation Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on 2008 55 (8): 1794-1808 en
dc.identifier.issn 0885-3010
dc.description.abstract A new method for measuring the pressure reflection coefficient in a buffer rod configuration is presented, together with experimental results for acoustic measurements of the liquid density, based on the measurement of the liquid's acoustic impedance. The method consists of using 2 buffers enclosing the liquid in a symmetrical arrangement with a transducer fixed to each buffer. One of the transducers is used in a pulse-echo mode while the other transducer operates as a receiver. The echo amplitudes leading to the pressure reflection coefficient as found by this method possess advantages such as reduced attenuation due to a shorter liquid transmission path and reduced interference, as compared with the ABC method. Measurements with distilled water and with special density calibration oil qualities have been performed using both the new method and the ABC method and are shown for the new method to give a density span within plusmn0.15% of the reference values. A comparison of the measured densities based on both a time-domain and a l2-norm frequency domain integration signal processing approach is given, along with a recommendation as to how the signal processing should be performed. en
dc.language.iso eng en
dc.publisher IEEE en
dc.subject Acoustic impedance en
dc.subject Acoustic measurement en
dc.subject Acoustic transducers en
dc.subject Density measurement en
dc.subject Frequency-domain analysis en
dc.subject Oils en
dc.subject Time-domain analysis en
dc.subject Water en
dc.subject Acoustic liquid density measurements en
dc.subject Buffer rod based measuring en
dc.subject Cell en
dc.subject Density span en
dc.subject Distilled water en
dc.subject Echo amplitudes en
dc.subject Interference reduction en
dc.subject l2-norm frequency en
dc.subject Domain integration signal processing approach en
dc.subject Liquid acoustic impedance measurement en
dc.subject Liquid transmission path en
dc.subject Pressure reflection coefficient measurement en
dc.subject Pulse-echo mode en
dc.subject Special density calibration oil qualities en
dc.subject Time-domain processing en
dc.subject Transducer arrangement en
dc.title A Novel Approach to Acoustic Liquid Density Measurements Using a Buffer Rod Based Measuring Cell en
dc.type Peer reviewed en
dc.type Journal article en
dc.subject.nsi VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430 en
dc.license.uri no
dc.licence ©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. eb
dc.rightsHolder IEEE en

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