Method of detecting discontinuities on elongated workpieces
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United States of America Patent
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Jan 18, 2005
Grant Date -
Dec 25, 2003
app pub date -
Apr 29, 2003
filing date -
Apr 29, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
In a method of detecting discontinuities on elongated workpieces, in particular tubes and bars, using ultrasonic testing system, a test object is positioned in relationship to a test head of the testing system, with the test object and the test head being moveable to one another. Signals from the test head are transmitted to an evaluation unit, where they are digitized and evaluated. The digitized signals of a test shot of a length position X are compared with digitized signals of a test shot of a length position X+.DELTA.X, wherein .DELTA.X is a multiple of a shot distance, and the difference is evaluated.
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