Hardware Equipment for Realtime-Determination of Data Gained from A-Scans by Automatic Ultrasonic Inspection for Flaw-Reconstruction by ALOK

Abstract

F r a u n h o f e r -I n s t i t u t f u r z e r s t o r u n g s f r e i e P r u f v e r f a h r e n Bldg. 37, U n i v e r s i t y , 6600 Saarbrucken, FRG ABSTRACT We d e s c r i b e an apparatus f o r automatic u l t r s v e r s e waves a t frequencies from 1 t o 4 MHz t h e described system has t h e f o l l o w i n g i mp o r t a n t and newly developed f e a t u r e s : -h i g h dynamic amplitude range o f 100 dB, -s i g n a l processing o f a complete A-scan i n r e a l --a p p l i c a t i o n o f a new search a l g o r i t h m , -t r a c k i n g o f a l l s i g n a l maxima o r i g i n a t e d from -t r a n s i t t i m e measurement o f maxima w i t h h i g h -p r o g r a m a b i l i t y of a l l i n s t r u m e n t a l and t e s t The developed data a r e analysed by ALOK procedure f o r t h e r e c o n s t r u c t i o n of f l a w s and d e f e c t s . time, f l a w s o r d e f e c t s , r e s o l u t i o n (50 n s ) , parameters f o r each t e s t mode.