| 摘要 |
Ultrasonic contact transducer with multiple ultrasonic emitting elements and means of bringing these elements into contact. This transducer is applicable particularly to non-destructive testing and comprises means ( 8, 10 ) for bringing elements ( 2 ) into contact with an object ( 6 ) to be checked and means ( 26, 28 , and 34 to 40 ) of determining the positions of elements relative to the object, using means bringing elements into contact, to determine delay laws to be applied to excitation pulses of the elements, to generate a focussed ultrasonic beam (F).
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