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Liquid volume measurement with a closed Helmholtz resonator under microgravity conditions.

Author(s) : NAKANO A., TORIKATA Y., YAMASHITA T., et al.

Summary

The authors attempted to apply the Helmholtz resonance technique to cryogens to confirm the applicability of the technique for measuring liquid volume under microgravity conditions. An experimental cell, which is regarded as a closed Helmholtz resonator, was prepared and liquid nitrogen used as a test liquid. A swept frequency signal was added to a loudspeaker and the acoustic response was detected by measuring the electrical impedance of the loudspeaker's voice coil. The Helmholtz resonance frequency was analyzed by use of the maximum entropy method. The Helmholtz resonance frequencies obtained under microgravity conditions agreed with the resonance frequencies obtained under terrestrial conditions. The authors confirmed that the Helmholtz resonance technique is applicable to cryogens under microgravity conditions. [Reprinted with permission from Elsevier. Copyright, 2005].

Details

  • Original title: Liquid volume measurement with a closed Helmholtz resonator under microgravity conditions.
  • Record ID : 2006-2803
  • Languages: English
  • Publication date: 2006/02
  • Source: Source: Cryogenics/Proc. Space Cryog. Workshop, Colorado Springs
    vol. 46; n. 2-3; 126-131; fig.; 10 ref.

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