Adaptive scanning technique for ultrasonic testing utilizing realtime lift-off detection
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United States of America Patent
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Apr 16, 1996
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app pub date -
Mar 16, 1993
filing date -
Mar 16, 1993
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Abstract
An adaptive scanning technique for ultrasonic testing of materials utilizing a realtime lift off detection system. The technique recognizes characteristic reflected/generated signals of partial and total lift off occurrences, wherein the ultrasonic transducer is separated from the surface of the test material. Once recognized and analyzed, these characteristic reflected signals are correlated with parameter changes preselected to compensate for such partial or total lift off occurrences. These parameter changes are communicated to a mechanical positioning system that alters the position, scanning speed, and vertical force with which mechanical compliance of the transducer is maintained with the test material.
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