Non-destructive testing by ultrasound of foundry products

G - Physics – 01 – N

Patent

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Details

G01N 29/06 (2006.01) G01N 29/04 (2006.01) G01N 29/22 (2006.01) G01N 29/26 (2006.01) G01N 29/265 (2006.01) G01N 29/44 (2006.01)

Patent

CA 2656120

Non-destructive testing device for tubes. It collects information from the imperfections of signals captured by ultrasonic receivers following the selective excitation of ultrasonic emitters according to a selected time law. The receivers form a selected geometrical layout, ultrasonically coupled by a relative rotation/translation movement with the tube. The device comprises a converter (891; 892) selectively isolating a numerical representation of echoes in designated time windows, according to the movement, and by creating an image (901; 902) of the imperfections, a filter (921; 922) that determines the presumed imperfection zones (Zcur) and their properties, a combiner (960) that prepares the digital work inputs from an extract (951; 952) of the images of an zone of imperfection, the properties of the latter taken from the filter, and context data (740), a neuronal circuit (970) that receives the work inputs, a digital decision and alarm stage (992) operating based on the neuronal circuit output, and an automated sorting and marking device (994) for the tubes considered to be non compliant by the decision and alarm stage.

Dispositif de contrôle non destructif de tubes. Il tire des informations sur des imperfections de signaux captés par des récepteurs ultrasonores consécutivement à l'excitation sélective d'émetteurs ultrasonores selon une loi de temps choisie. Les récepteurs forment un agencement de géométrie choisie, couplé de manière ultrasonore, avec mouvement relatif de rotation/translation, avec le tube. Le dispositif comprend un convertisseur (891; 892) isolant sélectivement une représentation numérique d'échos dans des fenêtres temporelles désignées, en fonction du mouvement, et en tirant une image (901; 902) d'imperfections, un filtre (921; 922) déterminant des zones d'imperfection présumée (Zcur) et des propriétés de celles-ci, un combinateur (960) préparant des entrées numériques de travail à partir d'un extrait (951; 952) des images d'une zone d'imperfection, de propriétés de celle-ci issues du filtre, et de données de contexte (740), un circuit neuronal (970) recevant les entrées de travail, un étage numérique de décision et d'alarme (992) opérant sur la base de la sortie du circuit neuronal, et un automate de tri et de marquage (994) des tubes décidés non conformes par l'étage de décision et alarme.

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