Verfahren und Anordnung zur Abbildung von Ultraschall- Wellenfedern
The method for imaging of ultrasonic wave fields, so that ultrasonic waves are cyclically excited in the object (2) to be tested, and the object surface is scanned at points of the object surface. The time related signals picked up by a sensor (8) are digitalised and stored. An instantaneous value to a specified point of time is used, and at least one image, corresponding to an instantaneous recording of the wave field, is produced. The excitation of the ultrasonic waves results using a converter (4) or a laser pulse. The instantaneous value from the respective space point to the selected time is stored, or the respective complete time signals from each space point are stored. USE/ADVANTAGE - Non destructive testing or medical diagnosis field. Recording and imaging is facilitated on any surface with high sensitivity. Cost is low. Inhomogeneities and-or defects are detected and characterised, non-destructively.
DE 1996-19603574 A: 19960201