Improved non-destructive ultrasonic testing with coupling check

Details Improved non-destructive ultrasonic testing with coupling check Improved non-destructive ultrasonic testing with coupling check

G - Physics

01

N

G01N 29/26 (2006.01)

Patent

CA 2725297

The invention relates to a method for non-destructive ultrasonic testing of a test piece (7), said method comprising a plurality of testing cycles, each of said cycles comprising a transmitting of at least one ultrasonic impulse into the test piece (7) by a plurality of ultrasonic transducers (2) and a receiving of the at least one ultrasonic impulse passing through the test piece (7) by the ultrasonic transducer (2) or optionally by other ultrasonic transducers. The method is characterized in that the plurality of ultrasonic transducers (2) are phase-controllable and form at least one group radiator (1), and that the method comprises at least one first testing cycle in which the phase-controllable ultrasonic transducers (2) of the at least one group radiator (1) are controlled during transmitting such that the rear wall echo of the test piece (7) is detected by said group radiator during receipt and that the method comprises at least one second testing cycle in which the phase-controllable ultrasonic transducer (2) of the same at least one group radiator (1) are controlled during transmitting such that a different main direction of propagation (8, 8') of the transmitted ultrasonic impulse into the test piece (7) is attained than that from the first testing cycle. The invention further relates to an associated

L'invention concerne un procédé d'examen non destructif à ultrasons d'une pièce à tester (7), lequel comprend plusieurs cycles de test qui incluent respectivement l'envoi d'au moins une impulsion ultrasonore dans la pièce à tester (7) par plusieurs transducteurs d'ultrasons (2) et la réception de ladite impulsion ultrasonore passée à travers la pièce à tester (7) par les ou éventuellement d'autres transducteurs d'ultrasons (2). Le procédé est caractérisé en ce que lesdits transducteurs d'ultrasons (2) peuvent être commandés en phase et forment au moins un transducteur matriciel (1), en ce que le procédé comprend au moins un premier cycle de test au cours duquel les transducteurs d'ultrasons (2) commandables en phase dudit transducteur matriciel (1) sont commandés de telle sorte, lors de l'émission, que l'écho de fond de la pièce testée (7) est détecté par ce transducteur matriciel lors de la réception et en ce que le procédé comprend au moins un deuxième cycle de test au cours duquel les transducteurs d'ultrasons (2) commandables en phase dudit transducteur matriciel (1) sont commandés lors de l'émission de telle sorte que le sens de propagation principal (8, 8') de l'impulsion ultrasonore émise obtenu dans la pièce testée (7) est différent de celui du premier cycle de test. L'invention concerne en outre un dispositif correspondant et son utilisation.

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