[9A9] X-ray television scanning detector
V Troitskiy, M Karmanov and R Pastovenskiy
E O Paton Electric Welding Institute, Ukraine
A highly sensitive X-ray television detector has been created at the Paton Electric Welding Institute (Ukraine), which uses an inexpensive digital fluoroscopic mini-sensor S10811-11 (Hamamatsu Photonics, Japan). These sensors have super-high resolution: pixel size 20 micrometers, working area 24 × 34 mm (1700 × 1200 pixels). Such characteristics are unattainable for similar large panels that are widely used all over the world.
The principle of scanning and stitching images of individual fragments of an object is used to increase the testing area. Scanner stepper drive moves the detector. The adjacent pieces of digital X-ray images received by scanning are stored and stitched by software in full-format digital image.
The cost of such systems is an order of magnitude lower and the resolution is five times higher in comparison to full-format semiconductor sensors. The time of obtaining a digital radiation image 300 × 34 mm is less than 3 minutes.
The thickness of the objects being tested for such a type of sensor (maximal voltage – 70 kV) is 6 mm aluminium.
These works on the creation of scanners for monitoring large extended objects should find wide application and are a good basis for an international project for monitoring of continuously operating objects, for example blades of wind power generators.
The principle of scanning and stitching images of individual fragments of an object is used to increase the testing area. Scanner stepper drive moves the detector. The adjacent pieces of digital X-ray images received by scanning are stored and stitched by software in full-format digital image.
The cost of such systems is an order of magnitude lower and the resolution is five times higher in comparison to full-format semiconductor sensors. The time of obtaining a digital radiation image 300 × 34 mm is less than 3 minutes.
The thickness of the objects being tested for such a type of sensor (maximal voltage – 70 kV) is 6 mm aluminium.
These works on the creation of scanners for monitoring large extended objects should find wide application and are a good basis for an international project for monitoring of continuously operating objects, for example blades of wind power generators.
