METHOD AND APPARATUS FOR ULTRASONIC INSPECTION
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United States of America Patent
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Issued Date -
Aug 25, 2011
app pub date -
Sep 14, 2009
filing date -
Sep 13, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An inspection device in the form of an acoustic transducer with a number of transducer elements that are arranged in a circumferential array around substantially the whole circumference of the device, to transmit and receive acoustic signals around substantially the whole circumference of the device, typically at substantially the same time, allowing assessment of the inspected object from different perspectives without requiring moving parts on the inspection device. In some embodiments, the transducer elements are circumferentially offset to improve the resolution, and can be axially stacked along the device. Circumferential arrangement of the transducer elements in the device allows the device to transmit and receive signals around substantially its whole circumference, and thereby allows it to inspect whole pipe planar sections in real time, and without requiring rotation of the transducers, thereby avoiding moving parts. This also permits the device to measure and compare the return time and/or distance from the device to different points on a tubular being inspected, at the same axial location along the tubular, and this allows a qualitative or optionally a quantitative measurement of eccentricity.
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