Investigation of the complex scanning method for the cylindrical ultrasonic array

Abstract

This paper explores scanning method for the cylindrical array. To determine steps of the scanning sequence, ultrasonic fields of the cylindrical array were simulated while number of exited elements and the focal point varies. The width and the length of the main beam lobe at the arbitrary focal points were calculated, while beam is focused or steered. The investigation answers the question to what extent we can steer focused beam and how the beam steering influences resolution and scanning time, while the distance of defects from the probe is not a constant. The scanning method can be used with ultrasonic convex and cylindrical arrays while object under investigation has axial symmetry and task is to cover the area of investigation with the same probability.