| 摘要 |
To inspect a part ( 1 ) by a non-destructive ultrasound inspection, the part is immersed in an acoustic wave conducting medium and an incident ultrasound wave ( 3 ) having a wide beam of section Sigma is emitted into the ultrasound-conducting medium towards the part. The characteristics of the waves ( 4, 5 ) reflected by faces ( 11, 12 ) of the part to be inspected are measured on at least a small section sigma, the characteristic dimensions of which are substantially less than those of the section Sigma. The location of the section or sections sigma is determined such that, despite the possible variations of the position of the part ( 1 ) and the relative slopes of its faces ( 11, 12 ), the section sigma is always located in the volumes passed through by the reflected waves ( 4, 5 ), for example substantially in an area close to the axis 31 of the incident beam ( 3 ) when the incident beam is controlled to be oriented substantially in a direction perpendicular to a face ( 11 ) of the part.
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