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Ultrasonic imaging methods-principles, realisations and applications

: Schmitz, V.

Iida, K.; Whittle, J.M. ; American Society for Metals -ASM-, Metals Park/Ohio; British Institute of Nondestructive Testing:
10th International Conference on NDE in the Nuclear and Pressure Vessels Industries
Metals Park/Ohio, 1990
ISBN: 0-87170-506-0
International Conference on NDE in the Nuclear and Pressure Vessels Industries <10, 1990, Glasgow>
Conference Paper
Fraunhofer IZFP ()
Fehlerprüfung; synthetische Apertur; Ultraschallabbildung; Zerstörungsfreie Prüfung

Ultrasonic methods for the evaluation of welding defects which are able to specify flaw position, flaw depth, inclination and shape are known as imaging or reconstruction methods. Due to the rapid development of modern my-processor techniques more and more equipment is available on the market which use manipulators and color screens for the presentation of the raw data or the processed B-Scan images. Systems like ALOK, Comson, P-Scan, SAFT, SuperSAFT, ZIP-Scan use either high-frequency of rectified data. Their technical realizations differ due to aspects like application as a searching method or as an analyzing method or concerning data reduction questions, off-line, on-line or realtime processing, easy handling or price of the equipment. This paper tries to compare systematically the different concepts and the implementation especially with respect to data acquisition and pixel oriented imaging. Examples of the different methods should allow to gain a deeper understanding of ultrasoni c imaging methods.