Liquid Volume Measurement for Cryogens with a Closed Heimholtz Resonator under Micro-gravity Conditions
Refueling an orbiter transfer vehicle in orbit requires accurate sensing of tank fuel levels. To establish an effective technique for measuring liquid volume under the micro-gravity (μG)conditions, we had attempted to apply a Helmholtz resonance technique to cryogens. The technique is capable of measuring the volume of any liquid shape.It is an effective method for measuring liquid volumes that assume variable shapes under μG conditions. We used a closed-type resonator and measured the volumes of liquid nitrogen (LN2) under the μG conditions while parabolic flights were conducted.The loudspeaker was driven by a swept sound,and the response of the electrical impedance was analyzed by using FFT to obtain the Helmholtz resonance frequency.We calculated the liquid volumes from the resonant frequencies. The measured volumes were compared with the true volumes of LN2 and the data obtained in 2004.
Nakano A Torikata Y Yamashita T Tateno A Nishizu T
National Institute of Advanced Industrial Science and Technology,Tsukuba,Ibaraki 305-8564,Japan Mayekawa MFG.Co.,Ltd.,Tatsuzawa 2000,Moriya,Ibaraki 302-0118,Japan JECC TORISHA Co.,Ltd.,Yoshinodai 1-1-1,Kawagoe,Saitama 350-0833,Japan Graduate School of Agriculture,Kyoto University,Sakyo-ku,Kyoto 606-8502,Japan
国际会议
上海
英文
860-863
2008-04-05（万方平台首次上网日期，不代表论文的发表时间）