Accurate motion plan of ultrasonic linear array transducer for non-destructive 3D endoscopy of iconic cultural heritage assets

In the present work an instrumentation that combines ultrasonic tomography with accurate motion control is presented. The acquisition of high-response tomographic images is achieved using transducers in a linear array through the efficient control of their phase characteristics both in transmit and receive modes. Moreover, an accurate mechanical adaptation is designed in order to move the ultrasonic probe with a constant velocity and a sequence of tomographic images is recorded. Then, the 3D endoscopic characteristics of the measured object are extracted via the reconstruction of the 3D volume. Finally, the functionality of the proposed device is validated in a test-case that simulates a realistic mosaic that is covered by mortar.