发明授权
- 专利标题： Measurement of propagating acoustic waves in compliant pipes
- 专利标题（中）： 柔性管道中传播声波的测量
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申请号： US09344070申请日： 1999-06-25
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公开(公告)号： US06435030B1公开(公告)日： 2002-08-20
- 发明人: Daniel L. Gysling , Rebecca S. McGuinn
- 申请人： Daniel L. Gysling , Rebecca S. McGuinn
- 主分类号： G01N2900
- IPC分类号： G01N2900
摘要：
A pipe 16 having a produced fluid 18 (liquid an/or gas) and at least two acoustic pressure sensors 20-24, is provided with a cylindrical sleeve 30 attached to the pipe 16 at two locations around a sensing region where the sensors 20-24 are located, the sleeve forming a closed cavity 32 filled with a fluid (or material) having an acoustic impedance (&rgr;c2) that is much less than the acoustic impedance (&rgr;c1) of the produced fluid 18 in the pipe 16 (i.e., &rgr;c2
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