发明名称 |
Apparatus and method for permeability measurement |
摘要 |
<p>The present invention provides an apparatus for use in measuring permeability of a material. The apparatus 1 comprises a non-conzact probs 6 comprising an inner pipe 8 and an outer pipe 10 which are arranged coaxially; a gas inlet for admitting a flow of gas into a first space 9 defined between the inner and outer pipes; and pressure difference measuring systems DP for measuring a pressure difference DELTA P between said first space (PI) and a second space (P2) comprising the interior of the inner pipe8. The probe 6 is mounted on a moveable head assembly 11 and the apparatus 1 further includes a position control system 12, 22 for controlling the movement of the head assembly 11 so as to cause the probe 6 to scan across a surface 2 of the material to be analysed, while maintaining the probe 6 at a constant distance Z from said surface 2, and for collecting pressure difference DELTA P measurements, using said pressure difference measuring device DP during scanning movement of the probe 6. <IMAGE></p> |
申请公布号 |
EP1262762(A2) |
申请公布日期 |
2002.12.04 |
申请号 |
EP20020253714 |
申请日期 |
2002.05.27 |
申请人 |
HERIOT-WATT UNIVERSITY |
发明人 |
SMART, BRIAN GEORGE D.;SOMERVILLE, JAMES MCLEAN;BOWEN, DAVID GORDON;AL-JABARI, NAIM WAJIH |
分类号 |
G01N33/24;G01N15/08;(IPC1-7):G01N15/08 |
主分类号 |
G01N33/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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