Ultrasonic inspection of complex composites

Complex composites are widely used in aerospace, automobile industry and other fields. Because parts of complex surface to be detected are usually parts with variable thickness. After analyzing the disadvantages of current testing method, an improved real-time sensitivity adjusting method based on stable amplitude is presented. Part curvatures (convex and concave) have a significant effect on both the ultrasonic response and the scanning resolution requirements. In order to ensure more ultrasonic signals transmitted through composites, transducer should always automatically follow the changing shape of curved surface. A twin-robot testing system is introduced to accomplish testing complex surface automatically. Moreover, the experimental results of testing different complex composites supported the opinion above.