| 摘要 |
<p>An apparatus including at least one Lamb wave transducer (2) housed within a recording wheel (1) made of a flexible material, containing an acoustic coupling fluid and designed for rolling engagement with the surface of a product to be inspected. Said apparatus includes a roller (8) engaging the surface (10) of the product (11) to be inspected, and located upstream from the recording wheel (1) relative to the moving direction of said product, as well as an inlet (15) for controllably delivering an expendable coupling fluid with good surface wetting properties onto the surface (10) of the moving product. The apparatus is mounted on a movable carriage (5) that rolls along said surface (10) and is combined with supporting and guiding means (17-24) for controlling its position on the surface (10). The apparatus enables cross scanning for the ultrasonic inspection of a product (11) moving at high speed, e.g. a steel strip, during the production thereof.</p> |
