ULTRASOUND INSPECTION METHOD AND APPARATUS
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United States of America Patent
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Issued Date -
Feb 10, 2011
app pub date -
Apr 20, 2009
filing date -
May 1, 2008
priority date (Note) -
Abandoned
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Abstract
A method of inspecting a component, the component comprising a hole with an entrance. The method comprises: directing ultrasound into the component via a liquid coupling medium; receiving ultrasound from the component via the liquid coupling medium; and processing the received ultrasound to determine a property of the component. The entrance of the hole is sealed with tape to prevent the liquid coupling medium from flowing into the entrance of the hole.The tape has an acoustic impedance within 40% of the acoustic impedance of the liquid coupling medium. By selecting a tape with an acoustic impedance relatively close to that of the liquid coupling medium (which in most cases will be water) the tape is relatively transparent to ultrasound and thus enables at least the presence or absence of a defect in a wall of the hole to be determined.
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