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Method for digital measurement of phase-frequency characteristics for a fixed-length ultrasonic spectrometer

  • Acoustic Signals Processing and Computer Simulation
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Abstract

One of the most accurate methods for measuring the compressibility of liquids is resonance measurement of sound velocity in a fixed-length interferometer. This method combines high sensitivity, accuracy, and small sample volume of the test liquid. The measuring principle is to study the resonance properties of a composite resonator that contains a test liquid sample. Ealier, the phase-locked loop (PLL) scheme was used for this. In this paper, we propose an alternative measurement scheme based on digital analysis of harmonic signals, describe the implementation of this scheme using commercially available data acquisition modules, and give examples of test measurements with accuracy evaluations of the results.

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Authors and Affiliations

  1. Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia

    M. E. Astashev

  2. Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia

    M. E. Astashev, K. N. Belosludtsev & D. P. Kharakoz

Authors
  1. M. E. Astashev
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  2. K. N. Belosludtsev
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  3. D. P. Kharakoz
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Correspondence to M. E. Astashev.

Additional information

Original Russian Text © M.E. Astashev, K.N. Belosludtsev, D.P. Kharakoz, 2014, published in Akusticheskii Zhurnal, 2014, Vol. 60, No. 3, pp. 312–319.

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Astashev, M.E., Belosludtsev, K.N. & Kharakoz, D.P. Method for digital measurement of phase-frequency characteristics for a fixed-length ultrasonic spectrometer. Acoust. Phys. 60, 335–341 (2014). https://doi.org/10.1134/S1063771014030038

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  • DOI: https://doi.org/10.1134/S1063771014030038

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