This paper is divided into four sections, the first being the introduction. Section 2 gives a brief description of the development of the system, focusing on the ultrasonic subsystem and the robot control. This section also provides the main parameters of the complete system, such as type of ultrasonic transducer, operating frequency, gain range,
bandwidth or the communication protocol between the control PC and the robot. Section 3 provides results from measurements made on samples with controlled crack geometries as well as internal density maps. Finally, Section 4 presents the main conclusions from this work.