G - Physics – 01 – N
Patent
G - Physics
01
N
349/42
G01N 29/04 (2006.01) G01N 29/14 (2006.01) G01S 5/22 (2006.01)
Patent
CA 1178706
ABSTRACT The invention relates to the monitoring of the presence of cracks, formation of cracks and growth of cracks in constructions, preferably complex steel con- structions, for example off-shore platforms. The crack indication is brought about by recording and analysis of acoustic emission from a crack in the construction and the invention is characterized in that a plurality of sensors, for example microphones or hydro- phones, are mounted in the medium which surrounds the construction and record acoustic emissions from a crack to the medium which surrounds the construction. The sig- nals measured by means of the sensors are fed to a signal analysis system in a computor which renders it possible to determine the position of the emission source, that is to say the crack, by analysis of the sensor signals caused by acoustic emission.
384475
Gowling Lafleur Henderson Llp
Kockums Ab
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