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NDT Research
Saferay Project
ChainTest Project
Polytec Project
ROBAIR Project
FilmFree Project
LRUCM Project
OLIWAM Project
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SAFERAY
Project
The objective of the Saferay project was to develop digital
radiographic techniques and hardware for the inspection of
safety critical welds and castings. These inspections are
currently done with traditional fine-grain film, as these films
have high resolution and good contrast, which make them ideal
for imaging small defects. Unfortunately, they suffer from the
following drawbacks:
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They require large amounts of
radiation, and increased exposure times to expose the film.
This increases production time and cost. The amount of
radiation involved has health and safety implications:
digital radiography uses less than 4% of the required
radiation of such films, and typically less than 10% of the
exposure time.
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The film does not have the
inherent advantages of a digital image, which include image
processing, communication and file-sharing
The reason fine-grain film is used instead of digital, is that
the resolution and contrast is sufficient to image small
defects, while current digital systems are not. The project
objective then, was to develop digital systems to rival
fine-grain film. This were achieved by:
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Developing digital
radiographic hardware to improve their performance
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Developing digital
radiographic techniques, using projection magnification, to
increase the resolution of the final image, and
direct-direct digital detectors to improve contrast and
inherent unsharpness.
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Automated Defect Recognition (ADR)
will be developed for castings and welds
Research and Development
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