طراحي و شبيه سازي پروب آرايه مايكرواستريپي مايكروويو

Air Coupled Ultrasound - New approaches in the field of coupling agent-free testing

Air-coupled ultrasound testing methods are becoming more important each day. This is primarily due to the possibility of a coupling agent-free measurement and the associated benefits. Simultaneously, the equipment technology and the ultrasonic transducers continue to evolve. Air-coupled ultrasonic testing is predominantly used in process control in production chains and is ideally suited for testing materials and structures such as composites, adhesives and honeycomb structures. Thus, a wide range of inspection tasks such as interface detection, the exposure of inhomogeneities or the detection of foreign object inclusion can be covered. Our article is intended to give an overview of developments in the field of air-coupled ultrasonic testing and to present them using the example of specific test tasks. Two most popular techniques: through transmission and guided waves are presented and compared. Selected testing examples cover materials widely used in aerospace industry such as honeycomb sandwich structures, CFRP - aluminum compounds and more