DISPOSITIF DE CONTROLE DE QUALITE DE PIECES TUBULAIRES PAR ULTRASONS

Immersed testing of a moving tubular part within a tank filled with an acoustic couplant fluid is performed by means of at least one stationary but positionally adjustable ultrasonic emitter-receiver tranducer 22a, 22b of annular design having a flat active face 26a, 26b directed towards a stationar...

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Hauptverfasser: R. GAMBIN, J.P. DUFAYET
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J.P. DUFAYET
description Immersed testing of a moving tubular part within a tank filled with an acoustic couplant fluid is performed by means of at least one stationary but positionally adjustable ultrasonic emitter-receiver tranducer 22a, 22b of annular design having a flat active face 26a, 26b directed towards a stationary ultrasonic mirror 18, 16. The mirror surrounds the tube and reflects the ultrasonic beam onto the tube wall at a constant angle of incidence. The active transducer face is divided into at least two separate active parts (Figs. 2, 3 not shown) which are excited cyclically and successively in time. The inspection device achieves high signal reproducibility in any angular location of flaws and a substantially enhanced signal-to-noise ratio. Inspection can be by transverse waves A2 or longitudinal waves A1. In the latter case a helical mirror 18 is associated with an effectively spiral transducer (Fig. 3).
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subjects INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
title DISPOSITIF DE CONTROLE DE QUALITE DE PIECES TUBULAIRES PAR ULTRASONS
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