Method for reducing digital data in an emat pig

Details Method for reducing digital data in an emat pig Method for reducing digital data in an emat pig

G - Physics

01

N

G01N 29/24 (2006.01) F16L 55/26 (2006.01) G01N 29/07 (2006.01) G01N 29/11 (2006.01) G01N 29/40 (2006.01) G01N 29/44 (2006.01)

Patent

CA 2596609

The invention relates to a method for reducing digital data which can be obtained with an electromagnetic acoustic transducer (EMAT) pig. Said method increases the fidelity of reproduction compared to traditional methods, without increasing and/or without significantly increasing the amount of data which is to be memorised. Said method enables, after the testing step, the ultrasonic envelopes to be reconstructed without a significant loss of information, from the data which is recorded in a reduced manner. Said method evaluates the size of the enveloping by method groups in order to determine the size. The size determination is discriminated in the quality thereof by the method groups in order to determine the signal base.

L'invention concerne un procédé de réduction de données numérisées obtenues avec un racleur à transducteur électromagnétique-acoustique (EMAT). Ce procédé augmente sensiblement la fidélité de reproduction par rapport à des procédés classiques, sans augmenter ou sans augmenter de manière significative la quantité de données à mémoriser. Ce procédé permet, après la phase d'essai, une reconstruction des enveloppes des signaux ultrasonores, sans perte d'information significative, à partir des données enregistrées de façon réduite. Ledit procédé évalue la largeur des enveloppes par le groupe de procédés pour déterminer des dimensions. La détermination de dimensions est discriminée du point de vue de sa qualité par le groupe de procédés pour déterminer le bruit de fond des signaux.

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