FIFTH CANADIAN CONFERENCE ON NONDESTRUCTIVE ... - IAEA

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Further development of the system will proceed along 2 divergent
paths. On one hand, there is a desire to build a production
version of the current research system. In this case flexibility
can be sacrificed, to some extent, for the sake of reducing
costs. Two changes likely to be made will be the use of a
somewhat lower resolution display, and the replacement of the DTR
with a peak detector and a hardware circuit for time-of-f1ight
measurements.
The second development path will see the implementation of more
sophisticated defect sizing and location techniques. Since the
system already offers the capability to digitize rf echo signals,
no specialized hardware should be necessary in order to
experiment with the use of methods such as amplitude-time locus
curves (ALOK) and the synthetic aperature focussing technique
(SAFT), among others (11).
ACKNOWLEDGEMENTS
The authors wish to thank the staff of Physical Metallurgy
Research Laboratories, CANMET and in particular Mr. V. Caron and
Dr. J. T. McGrath for their numerous helpful suggestions,
continued interest in the project, and a number of special
references.