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This work presents an ultrasonic non-destructive technique for in service railway wheels inspection. To overcome the problem of accessibility to critical regions where cracks may appear this method uses phased-array with immersion coupling, which allows carrying out the inspection process on non-dismantled wheels sets. The acquired frames are subjected to compound imaging methods in order to improve...
This paper introduces the fast focal law calculator (FFLC), a Newton-Raphson based algorithm that performs such task accurately at high speed. It is especially well suited for dynamic focusing through arbitrary geometry interfaces, where other algorithms are order of magnitude slower. In spite of the high speed of the FFLC, errors are kept very small, typically within a few tens of picoseconds. Besides...
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