Method and device for automatic determination of the permeability of a porous material having alternating levels of porosity
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United States of America Patent
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Feb 13, 2007
Grant Date -
Sep 30, 2004
app pub date -
Aug 8, 2002
filing date -
Aug 28, 2001
priority date (Note) -
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Abstract
A method and device for using a permeameter comprising a measuring head (2) opposite which the sheet or strip (1) is displaced step by step. The method and device can comprise a registration including the determination of the permeability profile of the strip (1) over a period T including two different successive permeability ranges, determination of a sinusoid from said profile, the of two extremes of said sinusoid, centering the measuring head (2) on the second extreme, and moving the strip step by step by T/2 and, at each step, performing a permeability measurement.
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