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Ultrasonic phased array technology for the non-destructive testing of marble sculptures

: Tiefensee, F.; Weber, P.; Kunz, S.; Pamplona, M.; Simon, S.


Studies in conservation 62 (2017), No.1, pp.55-60
ISSN: 0039-3630
ISSN: 0370-9124
Journal Article
Fraunhofer IBMT ()

The medical ultrasonic phased array technology was modified for the non-destructive testing of marble sculptures and the feasibility of the approach was evaluated. For this purpose, 1 MHz, 64-channel phased array electronic and phased array transducers were developed. The specifications of the electronics and the transducers are presented and discussed. Ultrasound images of inner structures of a marble sculpture are presented. The problem of the acoustic matching layers for different states of deterioration is discussed and the developments in view of a suitable matching layer solution are presented. This matching layer is combined with a new coupling technique that protects the marble surface. The results of experiments on ultrasound phantoms and on a marble sculpture are presented.