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Detection of moving objects and flows in liquids by ultrasonic phase conjugation

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Abstract

The possibility for the application of the method of parametric phase conjugation of ultrasonic waves in measuring the velocity of moving objects and flows is investigated. Results of experimental measurements of the Doppler frequency shift are presented for a low-frequency wave (1 MHz) generated by phase-conjugate waves (10 MHz and 11 MHz) propagating in opposite directions in the presence of a moving scatterer. The super high sensitivity of the phase of the low-frequency wave to variations in the spatial position of the scatterer is used to measure the velocity of the object. The presence of flows in the region of propagation of phase-conjugate waves returned leads to an uncompensated Doppler shift of the phase of the phase-conjugate wave at the primary radiation source. The implementation of this feature of ultrasonic phase conjugation for the detection and measurement of the flow velocities in a liquid is demonstrated experimentally.

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Authors and Affiliations

  1. Moscow State Institute of Radio Engineering, Electronics, and Automation, pr. Vernadskogo 78, Moscow, 117454, Russia

    Yu. V. Pyl’nov

  2. Institut d’Electronique, de Micro-electronique et de Nanotechnologie (IEMN-DOAE-UMR CNRS 8520), Ecole Centrale de Lille, Villeneuve d’Ascq Cedex, 59651, France

    Yu. V. Pyl’nov, P. Pernod & V. L. Preobrazhenskii

  3. Wave Research Center, Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia

    V. L. Preobrazhenskii

Authors
  1. Yu. V. Pyl’nov
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  2. P. Pernod
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  3. V. L. Preobrazhenskii
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Translated from Akusticheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 51, No. 1, 2005, pp. 128–132.

Original Russian Text Copyright © 2005 by Pyl’nov, Pernod, Preobrazhenskii.

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Pyl’nov, Y.V., Pernod, P. & Preobrazhenskii, V.L. Detection of moving objects and flows in liquids by ultrasonic phase conjugation. Acoust. Phys. 51, 105–109 (2005). https://doi.org/10.1134/1.1851635

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  • DOI: https://doi.org/10.1134/1.1851635

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